EN 71-4:2013

SLOVENSKI STANDARD
01-april-2013
1DGRPHãþD
SIST EN 71-4:2009
9DUQRVWLJUDþGHO.RPSOHWL]DNHPLMVNHSRVNXVHLQGUXJHSRVNXVHSULNDWHULK
VHXSRUDEOMDMRNHPLNDOLMH
Safety of toys - Part 4: Experimental sets for chemistry and related activities
Sicherheit von Spielzeug - Teil 4: Experimentierkästen für chemische und ähnliche
Versuche
Sécurité des jouets - Partie 4 : Coffrets d'expériences chimiques et d'activités connexes
Ta slovenski standard je istoveten z: EN 71-4:2013
ICS:
97.200.50 ,JUDþH Toys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 71-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2013
ICS 97.200.50 Supersedes EN 71-4:2009
English Version
Safety of toys - Part 4: Experimental sets for chemistry and
related activities
Sécurité des jouets - Partie 4: Coffrets d'expériences Sicherheit von Spielzeug - Teil 4: Experimentierkästen für
chimiques et d'activités connexes chemische und ähnliche Versuche
This European Standard was approved by CEN on 5 January 2013.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 71-4:2013: E
worldwide for CEN national Members.

Contents Page
Foreword . 3
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Chemical substances in experimental sets . 8
4.1 Chemistry sets . 8
4.2 Crystal growing sets . 14
4.3 Carbon dioxide generating experimental sets . 16
5 Equipment . 17
5.1 General requirements . 17
5.2 Containers and glassware . 18
5.2.1 Test tubes . 18
5.2.2 Other glassware . 18
5.2.3 Containers for reagents, substances and mixtures . 18
5.2.4 Packaging and closures . 18
5.2.5 Empty containers . 20
5.2.6 Test method for borosilicate glass . 20
5.3 Equipment for the transfer of liquid . 21
5.4 Test tube stand and test tube holder (see 5.1). 21
5.5 Eye protection (see 5.1) . 21
6 Marking . 21
6.1 General requirements . 21
6.2 Marking of individual containers, packaging and glassware . 22
6.3 Marking of the primary packaging . 22
7 Contents list with warnings and first aid information (see 5.1) . 23
8 Instructions for use (see 5.1) . 23
8.1 General instructions . 23
8.2 Advice for supervising adults . 24
8.3 Safety rules. 25
8.3.1 Chemistry sets . 25
8.3.2 Crystal growing sets . 25
8.3.3 Carbon dioxide generating experimental sets . 26
Annex A (normative) Test methods for closures of reagent containers. 28
Annex B (informative) Rationale . 29
Annex C (informative) Environmental considerations . 30
Annex D (informative) Significant technical changes between this European Standard and the
previous version . 31
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2009/48/EC . 32
Bibliography. 33

Foreword
This document (EN 71-4:2013) has been prepared by Technical Committee CEN/TC 52 “Safety of toys”, the
secretariat of which is held by DS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by August 2013, and conflicting national standards shall be withdrawn at
the latest by August 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 71-4:2009.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.
The significant changes from the previous edition of this standard are detailed in Annex D.
This standard is part 4 of a series of standards for the safety of toys.
This part 4 of the EN 71 series is intended to be read in conjunction with EN 71, part 1.
EN 71, Safety of toys, consists of the following parts:
 Part 1: Mechanical and physical properties
 Part 2: Flammability
 Part 3: Migration of certain elements
 Part 4: Experimental sets for chemistry and related activities (the present document)
 Part 5: Chemical toys (sets) other than experimental sets
 Part 7: Finger paints — Requirements and test methods
 Part 8: Activity toys for domestic use
 Part 9: Organic chemical compounds — Requirements
 Part 10: Organic chemical compounds — Sample preparation and extraction
 Part 11: Organic chemical compounds — Methods of analysis
 Part 12: N-Nitrosamines and N-nitrosatable substances
 Part 13: Olfactory board games, gustative board games, cosmetic kits and gustative kits
 Part 14: Trampolines for domestic use
In addition to the above parts of EN 71, the following guidance documents have been published:
 CR 14379:2002, Classification of toys — Guidelines,
 CEN/TR 15071:2005, Safety of toys — National translations of warnings and instructions for use in EN 71
 CEN/TR 15371:2013, Safety of toys — Replies to requests for interpretation of EN 71-1, EN 71-2, and
EN 71-8.
According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Introduction
This European Standard, EN 71-4, is intended to reduce the risks and health hazards to a child when
experimental sets involving chemical experiments are used as intended or in a foreseeable way, bearing in
mind the behaviour of children.
During use of these experimental sets, the hazards should be kept to a minimum by the provision of
appropriate information to make the experiments safe and controllable. Therefore, this European Standard
specifies warning phrases and instructions for use for experimental sets.
As a general rule, experimental sets are designed and manufactured for particular ages of children. Their
characteristics are related to the age and stage of development of the children, and their use presupposes
certain aptitudes. Age requirements are therefore given.
The requirements of this European Standard do not release parents or carers from their responsibility of
watching over the child while he or she is carrying out experiments. On the contrary, the use of these sets
requires close supervision by adults.
1 Scope
This European Standard specifies requirements for the maximum amount and, in some cases, the maximum
concentration of certain substances and mixtures used in experimental sets for chemistry and related
activities.
These substances and mixtures are:
 those classified as dangerous by the EC-legislation applying to dangerous substances [1], [2] and
dangerous mixtures [2], [3];
 substances and mixtures which in excessive amounts could harm the health of the children using them
and which are not classified as dangerous by the above mentioned legislation; and
 any other chemical substance(s) and mixture(s) delivered with the experimental set.
This standard applies to experimental sets for chemistry and related activities including crystal growing sets,
carbon dioxide generating experimental sets and supplementary sets. It also covers sets for chemical
experiments within the fields of mineralogy, biology, physics, microscopy and environmental science
whenever they contain one or more chemical substances and/or mixtures which are classified as hazardous
according to Regulation (EC) No. 1272/2008 [2].
This standard also specifies requirements for marking, a contents list, instructions for use, eye protection and
for the equipment intended for carrying out the experiments.
This standard does not apply to toys that are covered by EN 71-13 (e.g. cosmetic kits). Requirements for
certain other chemical toys are given in EN 71-5.
NOTE The terms “substance“ and “preparation“, as used in Directives 67/548/EEC [1] and 1999/45/EC [3], are also
used in the “REACH Regulation”, Regulation (EC) No. 1907/2006 [4]. According to the Globally Harmonised System
(GHS) of classification and labelling of chemicals, which in the European Union has been enacted by Regulation (EC) No.
1272/2008 (classification, labelling and packaging of substances and mixtures) [2], the timetable for the introduction of
GHS has to be followed.
The words “preparation” and “mixture” should be considered synonymous; both are a mixture or solution of substances
that do not react with each other. The old term “preparation” will be replaced by the new term “mixture” in due course. In
this standard, only the term “mixture” is used.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
EN 71-1, Safety of toys — Part 1: Mechanical and physical properties
EN 862, Packaging — Child-resistant packaging — Requirements and testing procedures for non-reclosable
packages for non-pharmaceutical products
EN ISO 868, Plastics and ebonite — Determination of indentation hardness by means of a durometer (Shore
hardness) (ISO 868)
EN ISO 8317, Child-resistant packaging — Requirements and testing procedures for reclosable packages
(ISO 8317)
ISO 7619-1, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1:
Durometer method (Shore hardness)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
chemical toy
toy intended for the direct handling of chemical substances and mixtures and which is used in a manner
appropriate to a given age-group and under the supervision of an adult
3.2
experimental set
chemical toy where the experimental and explorative character in playing with single chemical substances and
mixtures along strict instructions dominates over the creative ideas of the user
3.3
chemistry set
experimental set consisting of one or more chemical substances and/or mixtures with or without equipment
intended for carrying out chemical experiments
Note 1 to entry: The definition also covers experimental sets for chemical experiments within the fields of mineralogy,
biology, physics, microscopy and environmental sciences whenever they contain one or more chemical substances and/or
mixtures which are classified as hazardous according to Regulation (EC) No 1272/2008, excluding crystal growing sets
and carbon dioxide generating experimental sets.
3.4
crystal growing set
experimental set consisting of one or more chemical substances for growing crystals without any reaction
between the supplied substances
Note 1 to entry: A crystal growing set is used to grow crystals of different substances in aqueous solutions. The
crystals may be grown on different materials (e.g. stones or gypsum) and can be coloured in different ways (e.g. with food
colours): The expanding nature of the growing crystal is not subject to requirements within EN 71-1 for expanding
materials as the expansion is not related to the absorption of water in the crystal and the expansion usually takes place
over a long period of time (several days or weeks).
3.5
carbon dioxide generating experimental set
experimental set consisting mainly of a carbon dioxide-donor substance or mixture and a carbon dioxide-
liberating substance or mixture which after combination generate carbon dioxide in the presence of water in
an open system without any gas-tight restriction or confinement
Note 1 to entry: The set is used to carry out and observe chemical reactions where there is no intention to generate
carbon dioxide in order to demonstrate speed, velocity or noise.
3.6
supplementary set
incomplete experimental set which is intended to be used with a complete experimental set
3.7
cosmetic kit
toy, the purpose of which is to assist a child to learn to make products such as fragrances, soaps, creams,
shampoos, bath foams, glosses, lipsticks, other make-up, tooth-paste and conditioners
1)
4 Chemical substances in experimental sets
4.1 Chemistry sets
Only the chemical substances, mixtures and indicators given in Table 1 and Table 2 may be supplied in
chemistry sets or in a supplementary set for a chemistry set up to the amounts and concentrations specified in
those tables.
The quality of the chemicals used should be appropriate for the experiments described. In particular, the
chemicals should not contain impurities or substances that allow undefined and dangerous reactions to occur.
Apart from its presence in tincture of iodine, denatured alcohol (ethanol) shall not be supplied in a chemistry
set. However, where experiments contained in the instructions of a chemistry set require it, the use of
denatured alcohol may be suggested in the instructions.
The use of reagents listed in Table 3 may be suggested in the instructions at concentrations not exceeding
those specified in this table. The substances specified in Table 3 shall not be supplied in a chemistry set.
The instructions for use may suggest the use of other substances that are not classified as dangerous
substances [1], [2] (e.g. sucrose or table sugar) or mixtures that are not classified as dangerous mixtures [2],
[3]. Other dangerous substances shall not be supplied with the set.
The substances and mixtures in a chemistry set or in a supplementary set of a chemistry set shall be supplied
in containers which are provided with closures (see 5.2.4.1).
NOTE 1 Samples of rocks, stones, minerals on which to perform experiments in order to distinguish their composition
are sometimes supplied with the set.
Colorants and colouring materials which are not specified in Table 2 may only be supplied in chemistry sets if
they do not react with the substances and mixtures of the set and if they do not fulfil the criteria of any of the
following hazard classes:
 “acute toxicity” (hazard class 3.1),
 “skin corrosion/irritation” (hazard class 3.2),
 “serious eye damage/eye irritation” (hazard class 3.3),
 “respiratory or skin sensitisation” (hazard class 3.4),
 “germ cell mutagenicity” (hazard class 3.5),
 “carcinogenicity” (hazard class 3.6),
 “reproductive toxicity” (hazard class 3.7),
 “specific target organ toxicity — single exposure” (hazard class 3.8),
 “specific target organ toxicity — repeated exposure” (hazard class 3.9),
 “aspiration hazard” (hazard class 3.10).
Colorants which are permitted for use in food or cosmetics may be provided.

1) Words in italics are defined in Clause 3 (terms and definitions).
NOTE 2 The classification is detailed in Regulation (EC) No. 1272/2008 (Annex I, Part 3: Health Hazards).
Table 1 — Maximum amounts of chemical substances and mixtures for chemistry sets and labelling
(1 of 3)
Chemical Max. GHS Signal word CAS EINECS INDEX

substance/mixture amount Pictograms number number number
per set (see Figure 1)
Aluminium potassium 10043-67-
10 g − − 233-141-3 −
sulphate 1
Ammonium carbonate 10361-29-
5 g GHS07 Warning 233-786-0 −
Ammonium chloride 12125-02- 017-014-
30 g GHS07 Warning 235-186-4
9 00-8
Ammonium iron (III) 10138-04-
5 g GHS07 Warning 233-382-4 −
sulfate 2
Ammonium sodium 13011-54-
5 g − − 235-860-8 −
hydrogen phosphate 6
Calcium carbonate 100 g GHS07 Warning 471-34-1 207-439-9 −
Calcium chloride 10043-52- 017-013-
10 g GHS07 Warning 233-140-8
4 00-2
a
Calcium hydroxide 20 g GHS05 Danger 1305-62-0 215-137-3 −
Calcium nitrate GHS03, 10124-37-
5 g Warning 233-332-1 −
GHS07 5
a
Calcium oxide 10 g GHS05 Danger 1305-78-8 215-138-9 −
Calcium sulphate 100 g − − 7778-18-9 231-900-3 −
b
Charcoal 100 g − − 7440-44-0 231-153-3 −
Citric acid 20 g GHS07 Warning 77-92-9 201-069-1 −
Copper sheet 100 g − − 7440-50-8 231-159-6 −
Copper (II) oxide 10 g GHS07 Warning 1317-38-0 215-269-1 −
Copper (II) sulfate GHS07, 029-004-
15 g Warning 7758-98-7 231-847-6
GHS09 00-0
Disodium disulfite GHS05, 016-063-
10 g Danger 7681-57-4 231-673-0
GHS07 00-2
Glycerol (containing at
25 g − − 56-81-5 200-289-5 −
least 15 % water)
Table 1
(2 of 3)
Chemical Max. GHS Signal word CAS EINECS INDEX

substance/mixture amount Pictograms number number number
per set (see Figure 1)
Hexamethylene-
GHS02, 612-101-
10 g Warning 100-97-0 202-905-8
b
tetramine (solid fuel) GHS07 00-2
Iron fillings/iron
100 g GHS02 Warning 7439-89-6 231-096-4 −
b
powder
Iron (III) chloride GHS05,
10 g Danger 7705-08-0 231-729-4 −
GHS07
Iron (II) sulfate 026-003-
10 g GHS07 Warning 7720-78-7 231-753-5
00-7
Lactose 100 g − − 63-42-3 200-559-2 −

Lead-free solder 100 g − − − − −
Magnesium strip 3 g GHS02 Warning − − −
Magnesium sulfate 25 g − − 7487-88-9 231-298-2 −
Manganese (IV) 025-001-
5 g GHS07 Warning 1313-13-9 215-202-6
dioxide 00-3
Manganese (II) sulfate GHS08, 025-003-
15 g Warning 7785-87-7 232-089-9
GHS09 00-4
Ninhydrin 1 g GHS07 Warning 485-47-2 207-618-1 −
Pepsin A GHS07, 647-008-
10 g Danger 9001-75-6 232-629-3
GHS08 00-6
Potassium bromide 15 g GHS07 Warning 7758-02-3 231-830-3 −
Potassium −
10 g − − 13746-66-2 237-323-3
b
hexacyanoferrate (III)
Potassium −
10 g − − 13943-58-3 237-722-2
b
hexacyanoferrate (II)
Potassium iodide 10 g − − 7681-11-0 231-659-4 −
Potassium GHS03,
025-002-
c
permanganate 15 g GHS07, Danger 7722-64-7 231-760-3
00-9
GHS09
Potassium
permanganate: GHS03,
sodium sulphate 10 g GHS07, Danger − − −
mixture (1:2) (mass GHS09
fraction)
Silver nitrate
(0,01 g/ml mass GHS07, 047-001-
10 ml Warning 7761-88-8 231-853-9
concentration aqueous GHS09 00-2
solution)
Sodium acetate 20 g − − 127-09-3 204-823-8 −
Sodium carbonate 011-005-
50 g GHS07 Warning 497-19-8 207-838-8
00-2
Table 1
(3 of 3)
Chemical Max. GHS Signal word CAS EINECS INDEX

substance/mixture amount Pictograms number number number
per set (see Figure 1)
Sodium chloride 100 g − − 7647-14-5 231-598-3 −
Sodium hydrogen
50 g − − 144-55-8 205-633-8 −
carbonate
Sodium hydrogen 016-046-
30 g GHS05 Danger 7681-38-1 231-665-7
sulphate 00-X
Sodium silicate
solution 100 ml GHS05 Danger − − −
(SiO :Na O > 2)
2 2
Sodium sulfate 100 g − − 7757-82-6 231-820-9 −
Sodium thiosulfate 50 g − − 7772-98-7 231-867-5 −
Sulfur 016-094-
15 g GHS07 Warning 7704-34-9 231-722-6
00-1
Tannin 15 g − − 1401-55-4 215-753-2 −
−
Tartaric acid
20 g GHS07 Warning 87-69-4 201-766-0
−
Tin (II) chloride
15 g GHS07 Warning 7772-99-8 231-868-0
b
Tincture of iodine
053-001-
(0,025 g/ml mass
10 ml GHS02, Danger 7553-56-2 231-442-4 003
concentration
d
ethanolic solution)
b −
Urea
10 g − − 57-13-6 200-315-5
Zinc powder 030-001-
20 g GHS09 Warning 7440-66-6 231-175-3
(stabilised)/zinc pellets 01-9
Zinc sulfate GHS05,
(heptahydrate) 20 g GHS07, Danger 7446-20-0 231-793-3 −
GHS09
If not mentioned otherwise, the maximum amounts of the solid substances in Table 1 refer to the anhydrous
chemicals. Equivalent amounts of the hydrated chemicals may replace the anhydrous substances.
a
Only one of these substances shall be provided in each set.
b
Generally, IUPAC chemical nomenclature is used with the exceptions of these substances.
c
Only to be provided in chemistry sets intended for children over the age of 12 years.
d
Denatured alcohol (ethanol).
If indicators are supplied in solution, their solid contents shall not exceed the amounts and concentrations
specified in Table 2.
NOTE 3 Non-bleeding indicators in books, pads or rolls are not of toxicological concern and are sometimes supplied
without any quantity limitations for the relevant indicator(s).
Table 2 — Maximum amounts and concentrations of indicators for chemistry sets and labelling
Chemical Max. GHS Signal CAS EINECS INDEX

substance/mixture amount Pictograms word number number number
per set (see Figure 1)
Eosin 1 g GHS07 Warning 17372-87-1 241-409-6 −
Iodine (0,025 g/ml
mass concentration in
an aqueous solution
10 ml − − 7553-56-2 231-442-4 053-001-00-3
(0,025 g/ml mass
concentration) of
potassium iodide)
Litmus blue 1 g − − − − −
Litmus red 1 g − − 1393-92-6 215-739-6 −

Luminol (5 % (mass
fraction) mixture with 3 g − − 521-31-3 208-309-4 −
sodium sulfate)
Methyl orange
(15 % (mass fraction)
3 g GHS07 Warning 547-58-0 208-925-3 −
mixture with sodium
sulfate)
Methylene blue 1 g GHS07 Warning 61-73-4 200-515-2 −
Phenol red 1 g GHS07 Warning 143-74-8 205-609-7 −
Thymol blue 1 g − − 76-61-9 200-973-3 −
Bleeding universal
1 pad − − − − −
indicator paper
If not mentioned otherwise, the maximum amounts of the solid substances in Table 2 refer to the anhydrous
chemicals. Equivalent amounts of the hydrated chemicals may replace the anhydrous substances.

Table 3 — Maximum concentration of reagents not supplied with the chemistry set and labelling

Reagent Maximum GHS Signal CAS EINECS INDEX

concentration Pictograms word number number number
mol/l
(see Figure 1)
Ammonia solution 2 GHS07 Warning 1336-21-6 215-647-6 007-001-01-2
Hydrochloric acid 2 GHS07 Warning 7647-01-0 231-595-7 017-002-01-X
Hydrogen
1 - - 7722-84-1 231-765-0 008-003-00-9
a
peroxide
Sodium hydroxide
1 GHS05 Danger 1310-73-2 215-185-5 011-002-00-6
solution
Additional units (e.g. percentage) may also be used on the packaging, instructions for use etc.
a
The concentration of hydrogen peroxide is equivalent to a 3 % (volume fraction) solution.

a) GHS02 b) GHS03 c) GHS05
d) GHS07 e) GHS08 f) GHS09
These pictograms are taken from Regulation (EC) No. 1272/2008 of the European Parliament and the Council
of 16 December 2008 (also named GHS or CLP) on the classification, labelling and packaging of substances
and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation
(EC) No. 1907/2006. The dimensions and colours of these pictograms should comply with the requirements of
Annex I to this regulation [2].
Figure 1 — GHS pictograms
4.2 Crystal growing sets
Only the chemical substances given in Table 4 may be supplied in crystal growing sets or in a supplementary
set for a crystal growing set up to the amounts specified in that table.
A crystal growing set shall only contain substances which cannot react between each other.
The quality of the chemicals used in crystal growing sets should be appropriate for the experiments described;
in particular, the chemicals should not contain impurities or substances which allow undefined and dangerous
reactions to occur.
The substances and mixtures in a crystal growing set or in a supplementary set for a crystal growing set shall
be supplied in child-resistant packaging (see 5.2.4.2).
Only colourants and colouring materials which do not fulfil the criteria of any of the following hazard classes
 “acute toxicity” (hazard class 3.1),
 “skin corrosion/irritation” (hazard class 3.2),
 “serious eye damage/eye irritation” (hazard class 3.3),
 “respiratory or skin sensitisation” (hazard class 3.4),
 “germ cell mutagenicity” (hazard class 3.5),
 “carcinogenicity” (hazard class 3.6),
 “reproductive toxicity” (hazard class 3.7),
 “specific target organ toxicity — single exposure” (hazard class 3.8),
 “specific target organ toxicity — repeated exposure” (hazard class 3.9),
 “aspiration hazard” (hazard class 3.10),
shall be supplied in crystal growing sets. Colourants which are permitted for use in food or cosmetics may be
provided.
NOTE The classification is detailed in Regulation (EC) No. 1272/2008 (Annex I, Part 3: Health Hazards).
If substances are supplied as mixtures or if substances/mixtures are supplied in solution, their solid contents
shall not exceed the amounts specified in Table 4.
Samples of materials on which to grow the crystals may be supplied with the set (e.g. plaster of Paris
(gypsum), different stones, different minerals) without limits to their quantities. For gypsum, applicable
requirements are specified in EN 71-5 (i.e. labelling etc.).
Table 4 — Maximum amounts of chemical substances for crystal growing sets and labelling
(1 of 2)
Chemical substance Max. GHS Signal CAS EINECS INDEX

amount Pictograms word number number number
per set (see Figure
1)
g
a
Ammonium chloride 12125-02- 235-186- 017-014-
30 GHS07 Warning
9 4 00-8
Ammonium dihydrogen −
231-764-
orthophosphate (Ammonium 600 - - 7722-76-1
biphosphate)
Aluminium potassium sulfate 233-141-
600 - - 7784-24-9 −
b
Citric acid 201-069-
50 GHS07 Warning 77-92-9 −
Copper (II) sulfate GHS07, 231-847- 029-004-
50 Warning 7758-98-7
GHS09 6 00-0
Iron (II) sulfate 231-753- 026-003-
50 GHS07 Warning 7782-63-0
5 00-7
Magnesium sulfate 10034-99- 231-298- −
100 - -
8 2
Potassium dihydrogen 231-913- −
600 - - 7778-77-0
phosphate 4
Potassium hexacyanoferrate 13746-66- 237-323- −
100 - -
(III) 2 3
Potassium sodium tartrate 205-698- −
600 - - 6381-59-5
Sodium acetate 204-823- −
100 - - 127-09-3
Sodium hydrogen carbonate 205-633- −
600 - - 144-55-8
b
Sodium silicate 50 GHS05 Danger 1344-09-8 −
Sodium sulfate 231-820- −
100 - - 7757-82-6
Sodium thiosulfate 231-867- −
600 - - 7772-98-7
Strontium aluminate e.g. −
e.g. 234-
5 GHS 07 Warning 12004-37-
455-3
b
Tartaric acid 201-766- −
50 GHS07 Warning 87-69-4
Table 4
(2 of 2)
Chemical substance Max. GHS Signal CAS EINECS INDEX

amount Pictograms word number number number
per set (see Figure
1)
g
Trisodium citrate 200-675- −
600 - - 6132-04-3
c
e.g. 1314- e.g. 215- −
Zinc sulfide
5 - -
98-3 251-3
The maximum amounts specified in Table 4 refer to anhydrous chemicals. Equivalent amounts of the hydrated

chemicals may replace the anhydrous substances.
a
Shall be supplied as an aqueous solution.
b
Shall not be supplied in a set with sodium hydrogen carbonate.
c
Shall not be supplied in a set with any acid, e.g. citric acid.

4.3 Carbon dioxide generating experimental sets
Only the chemical substances given in Table 5 may be supplied in carbon dioxide generating experimental
sets whose function relies on the generation of carbon dioxide. The amounts supplied in a single set shall not
exceed those specified in Table 5. If mixtures of these substances are supplied in solid form, the single
mixture shall consist of stoichiometric equivalent amounts of acidic and CO -generating substances.
The quality of the chemicals used in carbon dioxide generating experimental sets should be appropriate for
the experiments described; in particular, the chemicals should not contain impurities or substances which
allow undefined and dangerous reactions to occur.
The substances in a carbon dioxide generating experimental set shall be supplied in child-resistant packaging
(see 5.2.4.3).
Carbon dioxide generating experimental sets may contain gypsum or colourants. For gypsum, applicable
requirements are specified in EN 71-5 (i.e. labelling etc.). Only colourants and colouring materials which do
not fulfil the criteria of any of the following hazard classes
 “acute toxicity” (hazard class 3.1),
 “skin corrosion/irritation” (hazard class 3.2),
 “serious eye damage/eye irritation” (hazard class 3.3),
 “respiratory or skin sensitisation” (hazard class 3.4),
 “germ cell mutagenicity” (hazard class 3.5),
 “carcinogenicity” (hazard class 3.6),
 “reproductive toxicity” (hazard class 3.7),
 “specific target organ toxicity — single exposure” (hazard class 3.8),
 “specific target organ toxicity — repeated exposure” (hazard class 3.9),
 “aspiration hazard” (hazard class 3.10),
shall be supplied in carbon dioxide generating experimental sets. Colourants that are permitted for use in food
or cosmetics may be provided.
NOTE The classification is detailed in Regulation (EC) No. 1272/2008 (annex I, Part 3: Health Hazards).
If substances are supplied as mixtures or if substances/mixtures are supplied in solution, their solid contents
shall not exceed the amounts specified in Table 5.
Table 5 — Maximum amounts of chemical substances for carbon dioxide generating experimental sets
and labelling
Chemical substance Max. GHS Signal CAS EINECS INDEX

amount Pictograms word number number number
per set (see Figure 1)
g
a
Citric acid 100 GHS07 Warning 77-92-9 201-069-1 −
Disodium hydrogen −
20 − − 7558-79-4 231-448-7
phosphate
a
Malic acid 60 GHS07 Warning 6915-15-7 230-022-8 −
Potassium hydrogen −
50 − − 298-14-6 206-059-0
carbonate
Potassium dihydrogen −
100 − − 7778-77-0 231-913-4
phosphate
Sodium dihydrogen −
70 − − 7558-80-7 231-449-2
phosphate
Sodium hydrogen −
100 − − 144-55-8 205-633-8
carbonate
a
60 GHS07 Warning 87-69-4 201-766-0 −
Tartaric acid
The maximum amounts specified in Table 5 refer to anhydrous chemicals. Equivalent amounts of the hydrated
chemicals may replace the anhydrous substances.
a
Only one of these substances shall be provided in each set.
5 Equipment
5.1 General requirements
Experimental sets, excluding supplementary sets, shall be supplied with instructions for use (see Clause 8); a
contents list with warnings and first aid information (see Clause 7); the equipment necessary for carrying out
the experiments described in the instructions for use; and, if required, eye protection (see 5.5) and/or a test
tube stand (see 5.4).
Supplementary sets shall be supplied with instructions for use (see Clause 8) and a contents list with warnings
and first aid information, as specified in Clause 7.
All the experiments described in the instructions for use shall be evaluated by the manufacturer. In particular,
it shall not be possible for substances to be formed in amounts that are injurious to health.
Any known hazards arising from the use of the set, especially during the experiments, should be detailed (e.g.
handling of chemicals, handling of glassware, retarded boiling point, back flow of barrier water into overheated
glassware, evolution of gases and handling of burners and other heating sources).
5.2 Containers and glassware
5.2.1 Test tubes
5.2.1.1 Sets in which test tubes are heated
In experimental sets where the instructions for use include chemical experiments in which test tubes are
heated, all test tubes shall be made of borosilicate glass in order to be heat resistant.
Glass test tubes which are intended to be heated shall have dimensions greater than 110 mm in length and
greater than 15 mm in internal diameter.
Glass test tubes which are not intended to be heated, for example, those used as containers, shall have
dimensions not greater than 90 mm in length and not greater than 12 mm in internal diameter unless they are
made of borosilicate glass.
When necessary, borosilicate glass shall be identified by the test method described in 5.2.6.
5.2.1.2 Sets in which test tubes are not heated
In experimental sets where the instructions for use do not include chemical experiments in which glass test
tubes are heated, any glass tubes not made of borosilicate glass shall be labelled in accordance with 6.2.
5.2.2 Other glassware
In experimental sets where the instructions for use include experiments in which laboratory glassware is
heated, all glassware intended to be heated shall be made of borosilicate glass in order to be heat resistant.
This requirement does not apply to glass tubing intended to be heated for the purpose of bending.
Unless made of borosilicate glass, glassware which is not intended to be heated but which by its appearance
or shape could be construed as being suitable for heating shall be labelled in accordance with 6.2.
When necessary, borosilicate glass shall be identified by the test method described in 5.2.6.
5.2.3 Containers for reagents, substances and mixtures
Containers for reagents shall differ in size and shape from laboratory glassware to avoid them being mistaken
as glassware for use in experiments.
All containers for reagents, substances and mixtures shall be shock-resistant. They shall not break or crack
when subjected to the drop test specified in EN 71-1.
5.2.4 Packaging and closures
5.2.4.1 Chemistry sets
All substances and mixtures shall be supplied in child-resistant containers. Closures for child-resistant
containers shall comply with one of the following requirements:
a) they shall comply with EN ISO 8317;
b) they shall require two independent movements to be opened: a vertical force downwards and a torque in
the clockwise or anticlockwise direction (e.g. bayonet joint). When tested in accordance with A.1 (closure
test A), the closure shall not open; or
c) they shall consist of a snap-in stopper and shall require an external tool to be opened. The closure shall
only be opened by a specifically designed tool. When tested in accordance with A.2 (closure test B), the
closure shall not open.
Closures for containers intended to be used for liquids shall not break, crack or leak when tested in
accordance with A.3 (closure test C).
NOTE Compliance with these requirements is intended to prevent younger children accessing materials contained in
such containers.
5.2.4.2 Crystal growing sets
The following crystal growing substances shall be supplied in packaging that complies with 5.2.4.1:
 ammonium chloride,
 citric acid,
 copper (II) sulfate,
 iron (II) sulfate,
 sodium silicate,
 strontium aluminate,
 tartaric acid.
All other crystal growing substances in Table 4 shall be supplied either:
a) in containers which are provided with closures that comply with 5.2.4.1; or
b) in non-reclosable, child-resistant packaging which complies with EN 862.
The containers and/or packaging in which the substances are supplied shall not contain more than 200 g.
5.2.4.3 Carbon dioxide generating experimental sets
The following carbon dioxide generating substances shall be supplied in packaging that complies with 5.2.4.1:
 citric acid,
 tartaric acid,
 malic acid.
All other carbon dioxide generating substances in Table 5 shall be supplied either:
a) in containers which are provided with closures that comply with 5.2.4.1; or
b) in non-reclosable, child-resistant packaging which complies with EN 862.
5.2.5 Empty containers
Empty containers intended for storage of reagents shall have a maximum volume in accordance with Table 6.
Table 6 — Maximum volume of the empty containers for reagents (see Table 3)
Maximum volume
of the empty container
Reagent
ml
Ammonia solution 50
Hydrochloric acid 100
Hydrogen peroxide 100
Sodium hydroxide solution 100
5.2.6 Test method for borosilicate glass
5.2.6.1 General
Several methods exist to distinguish borosilicate glass, e.g. determination of density and refractive index. A
density method is given here.
5.2.6.2 Apparatus and reagent
5.2.6.2.1 25-ml pycnometer
5.2.6.2.2 Water bath, capable of maintaining a temperature of (20 ± 1) °C.
5.2.6.2.3 Deionised water
5.2.6.2.4 Analytical balance, accuracy 0,1 mg.
5.2.6.3 Procedure
Weigh the pycnometer (m ). Make sure that the fraction from the glass sample is clean. Place it in the
pycnometer and re-weigh the pycnometer (m ). Then fill up the pycnometer with water and place it in a water
bath until the contents equilibrate at 20 °C. Top up the pycnometer with water. Remove the pycnometer from
the water bath, dry exterior and weigh (m ). Empty the pycnometer. Fill up the pycnometer with water and
place in water bath until the contents equilibrate at 20 °C. Top up the pycnometer with water, dry and weigh.
Record the weight (m ).
(m − m )
2 0
ρ = ⋅ρWater(20°C)
Glass
(m − m + m − m )
1 3 2 0
where
is the density of the glass sample in g/cm3;
ρ
Glass
is the density of water at 20 °C ( );

ρ ρ = 0,9882 g / cm³
Water(20°C) Water(20°C)
is the mass of the empty pycnometer, in g;
m
is the mass of the pycnometer filled with water, in g;
m
is the mass of the pycnometer with the glass sample, in g;
m
is the mass of the pycnometer with glass sample and water, in g.
m
NOTE Reference densities for certain types of glass are:
 (2,40 ± 0,05) g/cm³ for sheet window glass;
 (2,48 ± 0,05) g/cm³ for soft soda glass;
 (2,25 ± 0,05) g/cm³ for borosilicate glass;
 (2,21 ± 0,05) g/cm³ for fused silica glass.
5.3 Equipment for the transfer of liquid
Mouth-actuated pipettes shall not be supplied. Where the transfer of liquid is required, a mechanical means
which does not allow any aspiration by the mouth shall be provided (e.g. dropper with a permanently fitted
teat).
5.4 Test tube stand and test tube holder (see 5.1)
The test tube stand shall not overturn when a test tube positioned in an outermost hole is filled with 5 ml of
water a
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