SIST EN 15031:2022

SLOVENSKI STANDARD
SIST EN 15031:2022
01-julij-2022
Nadomešča:
SIST EN 15031:2014
Kemikalije, ki se uporabljajo za pripravo bazenske vode - Strjevanje na osnovi
aluminija
Chemicals used for treatment of swimming pool water - Aluminium based coagulants
Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Flockungsmittel auf
Aluminiumbasis
Produits chimiques utilisés pour le traitement de l'eau des piscines - Coagulants à base
d'aluminium
Ta slovenski standard je istoveten z: EN 15031:2022
ICS:
13.060.25 Voda za industrijsko uporabo Water for industrial use
71.100.80 Kemikalije za čiščenje vode Chemicals for purification of
water
SIST EN 15031:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 15031:2022

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SIST EN 15031:2022


EN 15031
EUROPEAN STANDARD

NORME EUROPÉENNE

June 2022
EUROPÄISCHE NORM
ICS 71.100.80 Supersedes EN 15031:2013
English Version

Chemicals used for treatment of swimming pool water -
Aluminium based coagulants
Produits chimiques utilisés pour le traitement de l'eau Produkte zur Aufbereitung von Schwimm- und
des piscines - Coagulants à base d'aluminium Badebeckenwasser - Flockungsmittel auf
Aluminiumbasis
This European Standard was approved by CEN on 20 April 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15031:2022 E
worldwide for CEN national Members.

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SIST EN 15031:2022
EN 15031:2022 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Description . 5
4.1 Aluminium sulfate . 5
4.2 Aluminium chloride (monomeric), aluminium chloride hydroxide (monomeric) and
aluminium chloride hydroxide sulfate (monomeric) . 8
4.3 Sodium aluminate . 11
4.4 Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate . 13
5 Purity criteria . 16
5.1 General. 16
5.2 Composition of commercial product . 16
5.3 Impurities and main by-products . 17
5.4 Chemical parameters. 17
6 Test methods . 18
6.1 Sampling . 18
6.2 Analyses. 19
7 Labelling - transportation - storage . 19
7.1 Means of delivery . 19
7.2 Risk and safety labelling in accordance with the EU Directives . 19
7.3 Transportation regulations and labelling . 23
7.4 Marking . 25
7.5 Storage . 25
Annex A (informative) General information on aluminium based coagulants . 27
Annex B (normative) General rules relating to safety . 29
Bibliography . 30

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SIST EN 15031:2022
EN 15031:2022 (E)
European foreword
This document (EN 15031:2022) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 15031:2013.
In comparison with the previous edition, the following technical modifications have been made:
— modification of 7.3 on transportation regulations and labelling, adding the sentence “The user shall
be aware of the incompatibilities between transported products.”;
— modification of 7.4 on marking. The requirements of marking are also applied to the accompanying
documents.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
3

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SIST EN 15031:2022
EN 15031:2022 (E)
Introduction
In respect of potential adverse effects on the quality of water for swimming pools, caused by the
products covered by this document:
a) this document provides no information as to whether the products may be used without restriction
in any of the Member States of the EU or EFTA;
b) it should be noted that, while awaiting the adoption of verifiable European criteria, existing
national regulations concerning the use and/or the characteristics of these products remain in
force.
NOTE Conformity with this document does not confer or imply acceptance or approval of the products in any
of the Member States of the EU or EFTA. The use of the products covered by this document is subject to regulation
or control by National Authorities.
4

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SIST EN 15031:2022
EN 15031:2022 (E)
1 Scope
This document is applicable to aluminium based coagulants (aluminium sulfate, aluminium chloride
(monomeric), aluminium chloride hydroxide (monomeric), aluminium chloride hydroxide sulfate
(monomeric), sodium aluminate and polyaluminium chloride hydroxide and polyaluminium chloride
hydroxide sulfate) used directly or for the production of formulations for treatment of water for
swimming pools.
It describes the characteristics of aluminium based coagulants and specifies the requirements and the
corresponding test methods for aluminium based coagulants. It gives information on their use in
swimming pool water treatment. It also determines the rules relating to safe handling and use
(see Annex B).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1302, Chemicals used for treatment of water intended for human consumption - Aluminium-based
coagulants - Analytical methods
ISO 3165, Sampling of chemical products for industrial use — Safety in sampling
ISO 6206, Chemical products for industrial use — Sampling — Vocabulary
ISO 8213, Chemical products for industrial use — Sampling techniques — Solid chemical products in the
form of particles varying from powders to coarse lumps
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
4 Description
4.1 Aluminium sulfate
4.1.1 Identification
4.1.1.1 Chemical name
Aluminium sulfate.
4.1.1.2 Synonym or common names
Aluminium sulfate, cake alum, alum.
NOTE In English the generic term “alum” is imprecise and is deprecated and in German the term “Alaun” is
misleading.
5

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EN 15031:2022 (E)
4.1.1.3 Relative molecular mass
342,14 for Al (SO ) .
2 4 3
4.1.1.4 Empirical formula
Al (SO ) .
2 4 3
4.1.1.5 Chemical formula
Al (SO ) ·nH O.
2 4 3 2
1
4.1.1.6 CAS Registry Number
Al (SO ) : 10043–01–3.
2 4 3
Al (SO ) ·16 H O: 16828–11–8.
2 4 3 2
Al (SO ) ·18 H O: 7784–31–8.
2 4 3 2
2

4.1.1.7 EINECS reference
Al (SO ) : 233–135–0.
2 4 3
4.1.2 Commercial forms
Aluminium sulfate is available in solid hydrated forms, with different particle sizes (slabs, kibbled,
ground, granulated) and in aqueous solutions.
4.1.3 Physical properties
4.1.3.1 Appearance
The product is a white solid or colourless to yellow, clear liquid.
4.1.3.2 Density
The density of a typical aluminium sulfate solution is given in Table 1 and varies depending on the mass
fraction of the active matter (aluminium content), expressed in grams per kilogram of solution
(Al g/kg).
Table 1 — Density of solution
Aluminium concentration Density at 15 °C
g/kg of solution g/ml
40,8 1,310
41,6 1,315
42,5 1,320
43,3 1,325
44,2 1,330
45,0 1,335

1
Chemical Abstracts Service Registry Number.
2
European Inventory of Existing Commercial Chemical Substances.
6

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4.1.3.3 Solubility
The theoretical limit of active matter content for a typical solution is given in Table 2.
Table 2 — Solubility
Temperature Active matter in Al
°C g/kg of solution
- 1 44,7
24 44,8
The practical limit of solubility depends on the temperature and the device used for solubilisation of the
solid form (slabs, kibbled, ground or granulated).
An indication of practical limits is given in Table 3.
Table 3 — Indication of practical limits of solubility
Temperature Active matter Al Solubility in grams solid form
(containing Al 90 g/kg of solid)
°C g/kg of solution
per kilogram of solution
15 37 410
4.1.3.4 Vapour pressure at 20 °C
Not known.
3
4.1.3.5 Boiling point at 100 kPa
Not known.
4.1.3.6 Crystallization point
The crystallization point of aluminium sulfate varies, depending on the concentration of the active
matter.
EXAMPLE – 7 °C for a typical solution of aluminium content of 42,4 g/kg of solution.
4.1.3.7 Specific heat
Not known.
4.1.3.8 Viscosity (dynamic)
The viscosity of aluminium sulfate solution varies greatly, depending on the concentration of the active
matter.
For a typical solution of aluminium content of 42,4 g/kg of solution, the viscosity is given in Table 4.

3
100 kPa = 1 bar.
7

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Table 4 — Viscosity
Temperature Viscosity
°C mPa·s
0 40,0
10 26,5
20 18,6
30 13,2
40 8,8
4.1.3.9 Critical temperature
Not applicable.
4.1.3.10 Critical pressure
Not applicable.
4.1.3.11 Physical hardness
Not applicable.
4.1.4 Chemical properties
Aluminium sulfate is an acidic hydrated salt or solution. Very diluted solutions hydrolyse and form a
precipitate of aluminium hydroxide.
Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH
value and the product should be used within an appropriate pH range.
4.2 Aluminium chloride (monomeric), aluminium chloride hydroxide (monomeric) and
aluminium chloride hydroxide sulfate (monomeric)
4.2.1 Identification
4.2.1.1 Chemical name
a) aluminium chloride (monomeric);
b) aluminium chloride hydroxide (monomeric);
c) aluminium chloride hydroxide sulfate (monomeric).
4.2.1.2 Synonym or common names
a) aluminium chloride;
b) aluminium chloride hydroxide;
c) aluminium chloride hydroxide sulfate.
4.2.1.3 Relative molecular mass
133,3 for AlCl .
3
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4.2.1.4 Empirical formula
a) AlCl ;
3
b) Al(OH) Cl with (a + b) = 3 and a less than or equal to 1,05;
a b
c) Al(OH) Cl (SO ) with (a + b + 2c) = 3 and a less than or equal to 1,05.
a b 4 c
4.2.1.5 Chemical formula
Variable (see 4.1.4).
4
4.2.1.6 CAS Registry Number
a) 7446-70-0;
b)
1) a and b variable: 1327-41-9 with a less than or equal to 1,05;
2) a = 1, b = 2: 14215-15-7;
c) a, b and c variable: 39290-78-3 with a less than or equal to 1,05.
5
4.2.1.7 EINECS reference
a) 231-208-1;
b)
1) 215-477-2;
2) 238-071-7;
c) 254-400-7.
4.2.2 Commercial forms
Aluminium chloride in the form of hexahydrate is available as crystals.
Liquid forms of aluminium chloride, aluminium chloride hydroxide and aluminium chloride hydroxide
sulfate (monomeric) are available as solutions or suspensions.
4.2.3 Physical properties
4.2.3.1 Appearance
The product is a white solid or colourless to yellow, clear liquid.
4.2.3.2 Density
The density depends on the particular composition, especially the aluminium ion content, expressed as
mass fraction of aluminium (Al) in %.

4
Chemical Abstracts Service Registry Number.
5
European Inventory of Existing Commercial Chemical Substances.
9

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Typical values for solutions:
a) aluminium chloride: 1,3 g/ml for 5,8 % Al;
b) aluminium chloride hydroxide: 1,35 g/ml to 1,40 g/ml for 9,5 % Al;
c) aluminium chloride hydroxide sulfate:
— 1,18 g/ml to 1,22 g/ml for 5,3 % Al;
— 1,18 g/ml for 4,2 % Al.
4.2.3.3 Solubility
Aluminium chloride, aluminium chloride hydroxide and aluminium chloride hydroxide sulfate
(monomeric) are fully miscible with water.
NOTE Depending on the particular product, diluted solutions can hydrolyze and form a precipitate.
4.2.3.4 Vapour pressure
Not known.
6
4.2.3.5 Boiling point at 100 kPa
Not known.
4.2.3.6 Crystallization point
Typical values for solutions:
a) aluminium chloride: – 20 °C for 5,8 % Al;
b) aluminium chloride hydroxide:
— ≤ – 20 °C for 9,5 % Al;
— approximately – 20 °C for 12,4 % Al;
c) aluminium chloride hydroxide sulfate:
— 10 °C to – 15 °C for 5,3 % Al;
— 5 °C for 4,2 % Al.
4.2.3.7 Specific heat
Not known.
4.2.3.8 Viscosity (dynamic)
Typical values for solutions at 20 °C:
a) aluminium chloride: approximately 10 mPa·s for 5,8 % Al;

6
100 kPa = 1 bar.
10

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SIST EN 15031:2022
EN 15031:2022 (E)
b) aluminium chloride hydroxide:
— 10 mPa·s to 50 mPa·s for 9,5 % Al;
c) aluminium chloride hydroxide sulfate:
— 3 mPa·s to 10 mPa·s for 5,3 % Al.
4.2.3.9 Critical temperature
Not applicable.
4.2.3.10 Critical pressure
Not applicable.
4.2.3.11 Physical hardness
Not applicable.
4.3 Sodium aluminate
4.3.1 Identification
4.3.1.1 Chemical name
Aluminium sodium oxide.
4.3.1.2 Synonym or common name
Sodium aluminate.
4.3.1.3 Relative molecular mass
82 for NaAlO .
2
4.3.1.4 Empirical formula
NaAlO 0,1 Na O·nH O (n varies from 0,3 to 0,4).
2 2 2
4.3.1.5 Chemical formula
NaAlO .
2
7
4.3.1.6 CAS Registry Number
11138-49-1.
8
4.3.1.7 EINECS reference
234-391-6.
4.3.2 Commercial form
Sodium aluminate is available as solids (powder or granules) or solutions.

7
Chemical Abstracts Service Registry Number.
8
European inventory of Existing Commercial chemicals Substances.
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4.3.3 Physical properties
4.3.3.1 Appearance
The product is a white powder or granules or colourless to yellow liquid.
4.3.3.2 Density
3
The absolute density of solid products is 2,35 g/cm .
3 3
The tamped bulk density (powder) is between 1 g/cm to 1,2 g/cm (depends on grain size).
The density of solutions is 1,5 g/ml for a solution containing 10 % of active matter, expressed as mass
fraction of aluminium in the product (10 % Al).
4.3.3.3 Solubility
Sodium aluminate is soluble in water to yield solutions of up to 12,7 % Al at 20 °C (concentration higher
than 400 g/l).
NOTE Depending on temperature and degree of dilution, solutions of sodium aluminate can hydrolyse and
form a precipitate.
4.3.3.4 Vapour pressure
— Solid not applicable;
— Solution not known.
9
4.3.3.5 Boiling point at 100 kPa
— Solid not applicable;
— Solution not known.
4.3.3.6 Melting or crystallization point
— Solid melting point: approximately 1 650 °C;
— Solution typical values for crystallization point range between – 15 °C and – 25 °C.
4.3.3.7 Specific heat
Not known.
4.3.3.8 Viscosity (dynamic)
Typical values of dynamic viscosity for sodium aluminate solutions, containing 10 % Al and 12,7 % Al
are given in Table 5.

9
100 kPa = 1 bar.
12

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Table 5 — Viscosity
Temperature Viscosity
°C mPa·s
 10 % Al 12,7 % Al
– 5 1 250 15 000
0 650 7 000
5 360 2 850
10 200 1 650
15 140 900
20 120 560
4.3.3.9 Critical temperature
Not applicable.
4.3.3.10 Critical pressure
Not applicable.
4.3.3.11 Physical hardness
— Solid not known;
— Solution not applicable.
4.3.4 Chemical properties
Sodium aluminate solutions are highly alkaline. Their solutions hydrolyse and form a precipitate of
aluminium hydroxide when diluted beyond a particular level or neutralized.
Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH
value and the product should be used within an appropriate pH range.
When dissolved in drinking water, calcium is partially precipitated with aluminium hydroxide.
4.4 Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate
4.4.1 Identification
4.4.1.1 Chemical names
a) Polyaluminium chloride hydroxide;
b) Polyaluminium chloride hydroxide sulfate.
4.4.1.2 Synonym or common names
a) Polyaluminium chloride, PAC, PACl; basic aluminium chloride, BAC.
NOTE In French, the term “Polychlorure d'aluminium” is deprecated.
b) Polyaluminium chloride, PAC; polyaluminium chloride sulfate, PACS.
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4.4.1.3 Relative molecular mass
Variable (see 4.1.4).
4.4.1.4 Empirical formula
a) Al(OH) Cl with (a + b) = 3 and a greater than 1,05;
a b
b) Al(OH) Cl (SO ) with (a + b + 2c) = 3 and a greater than 1,05.
a b c
4
4.4.1.5 Chemical formula
Variable (see 4.1.4).
10
4.4.1.6 CAS Registry Number
(a ) a and b variable: 1327-41-9 with a greater than 1,05;
1
(a ) a = 2,5; b = 0,5: 12042-91-0;
2
(a ) a = 2; b = 1: 10284-64-7;
3
(b) a, b and c variable: 39290-78-3 with a greater than 1,05.
11
4.4.1.7 EINECS reference
(a1) 215-477-2;
(a ) 234-933-1;
2
(a ) 233-632-2;
3
(b) 254-400-7.
4.4.2 Commercial forms
These products are generally available as liquids.
4.4.3 Physical properties
4.4.3.1 Appearance
The product is colourless to yellow.
4.4.3.2 Density
The density depends on the particular composition, especially the aluminium ion content, expressed as
mass fraction of aluminium (Al %).
Typical values:
a) Polyaluminium chloride hydroxide: 1,35 g/ml to 1,40 g/ml for 9,5 % Al;
b) Polyaluminium chloride hydroxide sulfate:
1) 1,18 g/ml to 1,22 g/ml for 5,3 % Al;

10
Chemical Abstracts Service Registry Number.
11
European Inventory of Existing Commercial Chemical Substances.
14

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2) 1,16 g/ml for 4,2 % Al.
4.4.3.3 Solubility
All polyaluminium chloride hydroxides and polyaluminium chloride hydroxide sulfates are fully
miscible with water.
NOTE Depending on the particular product, dilute solutions can hydrolyze and form a precipitate.
4.4.3.4 Vapour pressure
Not known.
12
4.4.3.5 Boiling point at 100 kPa
Not known.
4.4.3.6 Crystallization point
Typical values for solutions:
a) Polyaluminium chloride hydroxide:
1) – 20 °C for 9,5 % Al;
2) 0 °C for 12,4 % Al;
b) Polyaluminium chloride hydroxide sulfate:
1) – 10 °C to - 15 °C for 5,3 % Al;
2) – 5 °C for 4,2 % Al.
4.4.3.7 Specific heat
Not known.
4.4.3.8 Viscosity (dynamic)
Typical values for solutions at 20 °C:
a) polyaluminium chloride hydroxide: 10 mPa·s to 50 mPa·s for 9,5 % Al;
b) polyaluminium chloride hydroxide sulfate: 3 mPa·s to 10 mPa·s for 5,3 % Al.
4.4.3.9 Critical temperature
Not applicable.
4.4.3.10 Critical pressure
Not applicable.
4.4.3.11 Physical hardness
Not applicable.

12
100 kPa = 1 bar.
15

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4.4.4 Chemical properties
Polyaluminium chloride hydroxide and polyaluminium chloride hydroxide sulfate are acidic liquids
which hydrolyze and form a precipitate of aluminium hydroxide when diluted beyond a particular level.
Since aluminium compounds are amphoteric in nature, the solubility of aluminium depends on the pH
value and the products should be used within an appropriate pH range.
NOTE A characteristic of these products is their high tendency to hydrolyze which restricts their use; this
tendency results from the particular oligomeric or polymeric composition.
These products vary in their relative basicity (mole ratio OH/3Al), the percentage of chloride and
sulfate ions present and in their method of manufacture.
These variations can affect their performance in the water treatment plant. Special water plant
requirements regarding, but not limited to, such items as organic matter removal, residual aluminium
levels and working pH values should be specified when possible, so that the product which best fits the
need can be offered.
For additional information on aluminium based coagulants, see Annex A.
5 Purity criteria
5.1 General
This document specifies the minimum purity requirements for aluminium based coagulants used for
the treatment of water for swimming pools. Limits are given for impurities commonly present in the
products. Depending on the raw material and the manufacturing process, other impurities can be
present and, if so, this shall be notified to the user and when necessary to relevant authorities.
The national regulations allow users to clarify whether the product is of appropriate purity for the
treatment of water for swimming pools, taking into account water quality, required dosage, contents of
other impurities and additives used in the product and not stated in this product standard.
Limits have been given for impurities and chemical parameters where these are likely to be present in
significant quantities from the current production process and raw materials. If the production process
or raw materials lead to significant quantities of other impurities, by-products or additives being
present, this shall be notified to the user.
5.2 Composition of commercial product
The concentration of active matter (aluminium ion content) in the manufactured product expressed in
grams per kilogram of product shall be within ± 3 % of the manufacturer's declared values.
The concentration of water-soluble aluminium in commercial products varies. Typical values are given
in Table 6.
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Table 6 — Typical values
Product Commercial form Aluminium
concentration
g/kg of product
Aluminium sulfate Solid 72 to 91
 Solution 32 to 44
Sodium aluminate Solid 225 to 238
 Solution 100 to 132
a
Solution 30 to 124
Aluminium chloride
a
Solid 30 to 254
Aluminium chloride hydroxide
a
Aluminium chloride hydroxide sulfate
b
Solution 30 to 124
Polyaluminium chloride hydroxide
b
Solid 30 to 254
Polyaluminium chloride hydroxide sulfate
a
The commercial products vary in the proportions of chloride and sulfate ions. The relative basicity of
these products, expressed as the mole ratio OH/3Al, shall be less than or equal to 0,35.
b
The commercial products vary in the proportions of chloride and sulfate ions. The relative basicity of
these products, expressed as the mole ratio OH/3Al, shall be greater than 0,35.
5.3 Impurities and main by-products
Impurities derived from the manufacturing or extraction processes include insoluble matter, trace
metals and organic compounds. If iron is present, the products shall conform to the requirements
specified in Table 7.
Table 7 — Limits of impurities
Product Grade Impurity Limit
g/kg of Al
Aluminium sulfate Iron free Iron (Fe) max. 1,60
 Low iron Iron (Fe) max. 1,60 < Fe ≤ 115
 All grades Insoluble matter max. 23
Sodium aluminate  Iron (Fe) max. 0,8
  Insoluble matter (solid product) max. 8
NOTE The value quoted for iron is both iron (II) and iron (III).
5.4 Chemical parameters
The product shall conform to the requirements specified in Table 8.
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Table 8 — Chemical parameters
Limit
Parameter
mg/kg of Aluminium
 Type 1 Type 2 Type 3
Arsenic (As) max. 14 40 100
Cadmium (Cd) max. 3 50 100
Chromium (Cr) max. 30 700 1 000
Mercury (Hg) max. 4 10 20
Nickel (Ni) max. 20 700 1 000
Lead (Pb) max. 40 200 800
Antimony (Sb) max. 20 40 120
Selenium (Se) max. 20 40 120
-
NOTE Cyanide (CN ) is usually not relevant because of the acidity of the product.
Pesticides and polycyclic aromatic hydrocarbons are not relevant since the raw
materials used in the ma
...