SIST EN ISO 11140-1:2015

SLOVENSKI STANDARD
01-marec-2015
1DGRPHãþD
SIST EN ISO 11140-1:2009
Sterilizacija izdelkov za zdravstveno nego - Kemijski indikatorji - 1. del: Splošne
zahteve (ISO 11140-1:2014)
Sterilization of health care products - Chemical indicators - Part 1: General requirements
(ISO 11140-1:2014)
Sterilisation von Produkten für die Gesundheitsfürsorge - Chemische Indikatoren - Teil 1:
Allgemeine Anforderungen (ISO 11140-1:2014)
Stérilisation des produits de santé - Indicateurs chimiques - Partie 1: Exigences
générales (ISO 11140-1:2014)
Ta slovenski standard je istoveten z: EN ISO 11140-1:2014
ICS:
11.080.01 Sterilizacija in dezinfekcija na Sterilization and disinfection
splošno in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11140-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2014
ICS 11.080.01 Supersedes EN ISO 11140-1:2009
English Version
Sterilization of health care products - Chemical indicators - Part
1: General requirements (ISO 11140-1:2014)
Stérilisation des produits de santé - Indicateurs chimiques - Sterilisation von Produkten für die Gesundheitsfürsorge -
Partie 1: Exigences générales (ISO 11140-1:2014) Chemische Indikatoren - Teil 1: Allgemeine Anforderungen
(ISO 11140-1:2014)
This European Standard was approved by CEN on 23 August 2014.

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

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11140-1:2014 E
worldwide for CEN national Members.

Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 93/42/EC on medical devices .4

Foreword
This document (EN ISO 11140-1:2014) has been prepared by Technical Committee ISO/TC 198 "Sterilization
of health care products" in collaboration with Technical Committee CEN/TC 102 “Sterilizers for medical
purposes” the secretariat of which is held by DIN.
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 May 2015, and conflicting national standards shall be withdrawn at the
latest by May 2015.
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 ISO 11140-1:2009.
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.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 11140-1:2014 has been approved by CEN as EN ISO 11140-1:2014 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 93/42/EC on medical devices
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 93/42/EC on medical devices.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the clauses of this
standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of
conformity with the corresponding Essential Requirements of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this European Standard and Directive 93/42/EC
on medical devices
Clause(s)/sub-clause(s) of this Essential Requirements (ERs) Qualifying remarks/Notes
prEN ISO 11140-1 of Directive 93/42/EC
7.2
5.9 release of toxic substances
6.2.2 transfer type 1
6.4.2 transfer type. 3 – 6
7.2 test procedure
st
5.8 g) 7.3, 1 part Interfering substances
5.8 h) Safety precautions required
during and/or after use
6.2.2 Bleed and offset
4.1; 4.2; 5; 6.1; 6.2; 7; 8 8.7 type 1 indicator
5.8 13.1 Instructions for use
5.6, 5.7 13.2 Symbols
5.4, 5.6, 5.7, 5.8 i), 5.8 k) 13.3 a), b) Labelling
4 Classification of indicators
5.2 Critical variables and stated
values
5.8 j) 13.3 c) Labelling
5.4, 5.6, 5.7, 5.8 i), 5.8 k) 13.3 d) Labelling
4 Classification of indicators
5.2 Critical variables and stated
values
5.8 j) 13.3 e), f), g), h) Labelling, expiry date.
Clause(s)/sub-clause(s) of this Essential Requirements (ERs) Qualifying remarks/Notes
prEN ISO 11140-1 of Directive 93/42/EC
5.8 e) 13.3 i) Storage
5.8 g) Interfering substances
5.8 13.3 j) Instructions for use
5.8 h) 13.3 k) Safety precautions
5.4, 5.6, 5.7, 5.8 i), 5.8 k) 13.3 l) Labelling
4 Classification of indicators
5.2 Critical variables and stated
values
5.8 j) 13.3 m), n) Labelling
5.4 13.4 Marking
5.8 13.6 a) Marking
5.8 13.6 b) Marking
5.8 h) 13.6 e) Instructions after use
5.9 Toxicity declaration
5.8 g) 13.6 f) Interfering substances
5.8 h) 13.6 g), h), j), k), l), m), n), o), p) Instructions after use
5.9 Toxicity declaration
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
INTERNATIONAL ISO
STANDARD 11140-1
Third edition
2014-11-01
Sterilization of health care products —
Chemical indicators —
Part 1:
General requirements
Stérilisation des produits de santé — Indicateurs chimiques —
Partie 1: Exigences générales
Reference number
ISO 11140-1:2014(E)
©
ISO 2014
ISO 11140-1:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Categorization . 4
4.1 General . 4
4.2 Type 1: process indicators . 4
4.3 Type 2: indicators for use in specific tests . 5
4.4 Type 3: single critical process variable indicators . 5
4.5 Type 4: multicritical process variable indicators . 5
4.6 Type 5: integrating indicators . 5
4.7 Type 6: emulating indicators . 5
5 General requirements . 5
6 Performance requirements . 8
6.1 General . 8
6.2 Type 1 indicators. 9
6.3 Type 2 indicators. 9
6.4 Types 3, 4, 5 and 6 indicators . 9
7 Test methods . 9
7.1 General . 9
7.2 Off-set (transference) . 9
7.3 Procedure — Steam indicators . 9
7.4 Procedure — Dry heat indicators .10
7.5 Procedure — EO indicators .10
7.6 Procedure — Low temperature steam and formaldehyde indicators.11
7.7 Procedure — Vaporized hydrogen peroxide indicators .11
8 Additional requirements for process (Type 1) indicators .12
8.1 Process indicators printed or applied on to packaging material .12
8.2 Process indicators for steam sterilization processes .12
8.3 Process indicators for dry heat sterilization processes .12
8.4 Process indicators for ethylene oxide sterilization processes .13
8.5 Process indicators for radiation sterilization processes .13
8.6 Process indicators for low temperature steam and formaldehyde
sterilization processes .14
8.7 Process indicators for vaporized hydrogen peroxide sterilization processes.14
9 Additional requirements for single critical process variable (Type 3) indicators .15
10 Additional requirements for multicritical process variable (Type 4) indicators .15
11 Additional requirements for steam integrating (Type 5) indicators .16
12 Additional requirements for ethylene oxide integrating (Type 5) indicators .17
13 Additional requirements for emulating (Type 6) indicators .17
Annex A (normative) Method for demonstrating shelf-life of the product .19
Annex B (informative) Examples of testing indicators .20
Annex C (informative) Rationale for the requirements for integrating indicators and the link
to the requirements for biological indicators specified in ISO 11138 (all parts) and
microbial inactivation .22
Annex D (informative) Rationale for the liquid-phase test method for low temperature steam and
ISO 11140-1:2014(E)
formaldehyde indicators .29
Annex E (informative) Relationship of indicator and indicator system components .30
Bibliography .31
iv © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 198, Sterilization of health care products.
This third edition cancels and replaces the second edition (ISO 11140-1:2005), which has been technically
revised.
ISO 11140 consists of the following parts, under the general title Sterilization of health care products —
Chemical indicators:
— Part 1: General requirements
— Part 3: Class 2 indicator systems for use in the Bowie and Dick-type steam penetration test
— Part 4: Class 2 indicators as an alternative to the Bowie and Dick-type test for detection of steam
penetration
— Part 5: Class 2 indicators for Bowie and Dick-type air removal tests
ISO 11140-2 has been withdrawn and replaced by ISO 18472.
ISO 11140-1:2014(E)
Introduction
This part of ISO 11140 specifies performance requirements and/or test methods for chemical indicators
intended for use with sterilization processes employing steam, dry heat, ethylene oxide, γ or β radiation,
low temperature steam and formaldehyde or vaporized hydrogen peroxide.
Additional requirements for indicators intended for use with other sterilization methods (e.g. other
forms of moist heat sterilization) are not specifically provided in this part of ISO 11140; however, the
general requirements will apply.
The requirements for specific test indicators (e.g. Bowie-Dick test indicators and indicator systems) are
covered in other parts of ISO 11140.
Standards for sterilizers and for the validation and process control of sterilization describe performance
tests for sterilizers and methods of validation and routine control, respectively.
This part of ISO 11140 is intended for manufacturers of chemical indicators and specifies the general
requirements for chemical indicators. The categorization structure for chemical indicators is used solely
to denote the characteristics and intended use of each type of indicator when used as specified by the
manufacturer. This categorization has no hierarchical significance. The chemical indicators described
in this part of ISO 11140 are categorized into six types. The chemical indicators within each of these
categorizations are further subdivided by the sterilization process for which they are designed to be
used. This part of ISO 11140 defines the requirements for Type 1 and Types 3 to 6. In subsequent parts
of ISO 11140, the requirements for Type 2 indicators are categorized by their intended use. The use of
the indicators and indicator systems, specified in this part of ISO 11140, is described in for example the
ISO 11135, the ISO 17665- series, ISO 15882, EN 285, and EN 13060.
Resistometers are used to characterize the performance of the chemical indicators described in this part
of ISO 11140, with the exception of Type 2 indicators. Requirements for resistometers are specified in
ISO 18472. Resistometers differ from sterilizers. As sterilizers cannot duplicate resistometer conditions
they should not be used to test the performance of chemical indicators. Sterilizers from different
manufacturers and of different ages have significantly different cycle profiles; for example, prolonged
preconditioning phases. Resistometers allow for precise control of the specific test cycle sequences in
order to study the effect of process parameters on indicator performance under controlled, repeatable
conditions. Guidance on the selection, use and interpretation of the results of chemical indicators is given
in ISO 15882. Users of chemical indicators are expected to make reference to this part of ISO 11140.
vi © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 11140-1:2014(E)
Sterilization of health care products — Chemical
indicators —
Part 1:
General requirements
WARNING — The use of this part of ISO 11140 can involve hazardous materials, operations
and equipment. This part of ISO 11140 does not purport to address all of the safety problems
associated with their use. It is the responsibility of the user of this part of ISO 11140 to determine
the applicability of national or regional regulatory requirements and to establish appropriate
occupational health and safety practices prior to use of any hazardous materials, operations
and/or equipment.
1 Scope
This part of ISO 11140 specifies general requirements and test methods for indicators that show exposure
to sterilization processes by means of physical and/or chemical change of substances, and which are
used to monitor the attainment of one or more of the process parameter(s) specified for a sterilization
process. They are not dependent for their action on the presence or absence of a living organism.
NOTE 1 Biological test systems are regarded as those test systems which are dependent for their interpretation
on the demonstration of the viability of an organism. Test systems of this type are considered in the ISO 11138-
series for biological indicators (BIs).
The requirements and test methods of this part of ISO 11140 apply to all indicators specified in
subsequent parts of ISO 11140, unless the requirement is modified or added to by a subsequent part, in
which case the requirement of that particular part will apply.
Relevant test equipment is described in ISO 18472.
NOTE 2 Additional requirements for specific test indicators/indicator systems (Type 2 indicators) are given in
ISO 11140-3, ISO 11140-4 and ISO 11140-5.
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.
ISO 8601:2004, Data elements and interchange formats — Information interchange — Representation of
dates and times
ISO 11135:2014, Sterilization of health-care products — Ethylene oxide — Requirements for the development,
validation and routine control of a sterilization process for medical devices
ISO 11137-1:2006, Sterilization of health care products — Radiation — Part 1: Requirements for development,
validation and routine control of a sterilization process for medical devices
ISO 11137-2:2013, Sterilization of health care products — Radiation — Part 2: Establishing the sterilization
dose
ISO 11137-3:2006, Sterilization of health care products — Radiation — Part 3: Guidance on dosimetric
aspects
ISO 11140-1:2014(E)
ISO 11138-1:2006, Sterilization of health care products — Biological indicators — Part 1: General
requirements
ISO 11138-2:2006, Sterilization of health care products — Biological indicators — Part 2: Biological
indicators for ethylene oxide sterilization processes
ISO 11138-3:2006, Sterilization of health care products — Biological indicators — Part 3: Biological
indicators for moist heat sterilization processes
ISO 11138-4:2006, Sterilization of health care products — Biological indicators — Part 4: Biological
indicators for dry heat sterilization processes
ISO 11138-5:2006, Sterilization of health care products — Biological indicators — Part 5: Biological
indicators for low-temperature steam and formaldehyde sterilization processes
ISO 11140-3:2007, Sterilization of health care products — Chemical indicators — Part 3: Class 2 indicator
systems for use in the Bowie and Dick-type steam penetration test
ISO 11140-4:2007, Sterilization of health care products — Chemical indicators — Part 4: Class 2 indicators
as an alternative to the Bowie and Dick-type test for detection of steam penetration
ISO 11140-5:2007, Sterilization of health care products — Chemical indicators — Part 5: Class 2 indicators
for Bowie and Dick-type air removal tests
ISO 17665-1:2006, Sterilization of health care products — Moist heat — Part 1: Requirements for the
development, validation and routine control of a sterilization process for medical devices
ISO/TS 17665-2:2009, Sterilization of health care products — Moist heat — Part 2: Guidance on the
application of ISO 17665-1
ISO/TS 17665-3:2013, Sterilization of health care products — Moist heat — Part 3: Guidance on the
designation of a medical device to a product family and processing category for steam sterilization
ISO 18472:2006, Sterilization of health care products — Biological and chemical indicators — Test
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
bleed
unintentional lateral migration of the indicator agent beyond the margins within which the indicator
agent was applied
3.2
critical process variable
variable identified as being essential to the attainment of sterilization and monitored by the chemical
indicator
3.3
endpoint
point of the observed change defined by the manufacturer, occurring after the indicator has been
exposed to specified stated values
3.4
exposure period
time from the attainment of the specified exposure conditions to its termination
2 © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
3.5
graduated response
progressive observable change occurring on exposure to one or more critical process variables allowing
assessment of the level achieved
3.6
indicator
combination of the indicator agent and its substrate that reveals change in one or more process variables
based on a chemical or physical change resulting from exposure to a process
Note 1 to entry: An indicator intended to be used only in combination with a specific test load is also termed an
indicator (both together becoming an indicator system).
Note 2 to entry: See Annex E.
3.7
indicator agent
active substance(s) or combination of substances
Note 1 to entry: See Annex E.
3.8
indicator system
combination of an indicator and a specific test load
3.9
off-set
transfer of indicator agent to a material in intimate contact with the surface of the indicator
3.10
process parameter
specified value for a critical process variable
Note 1 to entry: The specification for a sterilization process includes the process parameters and their tolerances.
[SOURCE: ISO/TS 11139:2006, 2.34]
3.11
saturated steam
water vapour in a state of equilibrium between condensation and evaporation
3.12
stated value
SV
value or values of a critical process variable at which the indicator is designed to reach its endpoint as
defined by the manufacturer
3.13
substrate
carrier or support material on to which the indicator agent is applied
Note 1 to entry: See Annex E.
3.14
visible change
change defined by the manufacturer, which can be seen in Type 1 indicators after exposure to one or
more critical process variables of the process
ISO 11140-1:2014(E)
4 Categorization
4.1 General
The chemical indicators or indicator systems described in this part of ISO 11140 are for use in three
main applications:
a) to allow differentiation between unprocessed and processed items;
b) in specific tests and/or procedures, e.g. the Bowie-Dick test;
c) placement inside individual load items in order to assess attainment of the process parameter(s)
and attainment of the respective parameter(s) at the point of placement.
The six indicator types described in the main body of this part of ISO 11140 are categorized according
to their performance requirements. Table 1 describes three categories according to their intended use.
The chemical indicators within each of these categorizations are further subdivided by the sterilization
process for which they are designed to be used. These categorizations have no hierarchical significance.
Attainment of the chemical indicator’s end point should not be regarded as an indication of attainment
of an acceptable sterility assurance level, but rather one of many factors which should be taken into
consideration when judging the acceptability of a sterilization process.
Table 1 — Categories according to intended use
Intended use Type Category Description (intended use)
Indicate exposure to a process to allow differ- 1 e1 “Exposure” or process indicator
entiation between unprocessed and processed
Requirements according to Type 1
items, and/or indicate gross failure of a steriliza-
tion process.
Indicators for use in special applications, e.g. 2 s2 “Special” indicator (e.g. Bowie-
Bowie and Dick-type test. Dick)
Requirements in accordance with
ISO 11140-3, ISO 11140−4, and
ISO 11140−5.
Indicators to be placed This indicator only 3 i3 “Internal” indicator
inside individual load reacts to one critical
Single variable indicator
items and to assess attain- process variable.
ment of the critical process
Requirements according to Type 3
variables at the point of
This indicator reacts 4 i4 “Internal” indicator
placement.
to more than one
Multivariable indicator
critical process vari-
able. Requirements according to Type 4
This indicator reacts 5 i5 “Internal” indicator
to all critical process
Integrating indicator
variables.
Requirements according to Type 5
This indicator reacts 6 i6 “Internal” indicator
to all critical process
Emulating indicator
variables.
Requirements according to Type 6
4.2 Type 1: process indicators
Process indicators shall be designed for use with individual items (e.g. packs, containers) to show that
the unit has been directly exposed to the sterilization process and to distinguish between processed
and unprocessed items.
4 © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
4.3 Type 2: indicators for use in specific tests
Type 2 indicators are intended for use in specific test procedures as defined in relevant
sterilizer/sterilization standards. The requirements for specific test indicators and indicator systems
(Type 2 indicators) are provided in ISO 11140-3, ISO 11140-4, and ISO 11140-5.
4.4 Type 3: single critical process variable indicators
A single critical process variable indicator shall be designed to react to one of the critical process
variables (see 5.2) and is intended to indicate exposure to a sterilization process at a stated value (SV)
of the chosen critical process variable (see 5.7 and 5.8).
4.5 Type 4: multicritical process variable indicators
A multicritical process variable indicator shall be designed to react to two or more of the critical process
variables (see 5.2) and is intended to indicate exposure to a sterilization process at SVs of the chosen
critical process variables (see 5.7 and 5.8).
4.6 Type 5: integrating indicators
An integrating indicator shall be designed to react to all critical process variables (see 5.2). The SVs are
generated to be equivalent to, or exceed, the performance requirements given in the ISO 11138- series
for BIs. The minimum SV shall be related to the minimum values required to achieve sterilization as
specified in International Standards ISO 11135, ISO 11137 (all parts), ISO 17665 (all parts), or by local
regulatory agencies (see Clauses 11 and 12).
NOTE The SVs demonstrate how the indicator integrates over the temperature range.
4.7 Type 6: emulating indicators
An emulating indicator shall be designed to react to all critical process variables for specified sterilization
processes. The SVs are generated from process variables of sterilization processes as specified in
International Standards ISO 11135, ISO 11137 (all parts) and ISO 17665 (all parts), or by regulatory
agencies (see Clause 13).
5 General requirements
5.1 The requirements given in this clause shall apply to all chemical indicators (CI) unless specifically
excluded or amended in a subsequent clause or part of ISO 11140.
NOTE For ease of reading, only the term “indicator” is used hereinafter, although requirements do also apply
to indicator systems.
ISO 11140-1:2014(E)
5.2 For the different sterilization processes, the following critical process variables are defined as being
critical:
STEAM Time, temperature, moisture
DRY HEAT Time and temperature
ETHYLENE OXIDE Time, temperature, relative humidity and ethylene oxide (EO)
concentration
RADIATION Total absorbed dose
LOW TEMPERATURE STEAM Time, temperature, moisture and formaldehyde concentration
AND FORMALDEHYDE
VAPORIZED HYDROGEN Time, temperature, hydrogen peroxide concentration
PEROXIDE
5.3 The manufacturer shall establish, document and maintain a formal quality system to cover all
operations required by this part of ISO 11140.
NOTE ISO 9001 and ISO 13485 describe requirements for quality systems for design, manufacture and
testing.
5.4 Each indicator shall be clearly marked with the type of process for which it is intended to be used
(see 5.6 and 5.7), and either
a) with a number indicating the type of indicator, i.e. 1 to 6, or
b) with a combination of a letter plus a number to indicate a category, i.e. e1, s2, i3, i4, i5, or i6.
For Type 3, 4, 5 and 6 indicators, each indicator shall be clearly marked with the SVs.
NOTE Some indicator manufacturers might use the category notation to provide additional guidance for the
intended use of the chemical indicator.
Where the size or format of the indicator does not permit this information to be stated in a font of six
characters per centimetre or larger, the information shall be provided on the label and/or instructions
for use.
5.5 The indicator shall comply with the requirements of this part of ISO 11140 for the duration of the
shelf-life as specified by the manufacturer (see Annex A).
5.6 Abbreviated descriptions of the process shall be in accordance with the following symbols:
— all steam sterilization processes
— all dry heat sterilization processes
6 © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
— all ethylene oxide sterilization processes
— all ionizing radiation sterilization processes
— all low temperature steam and formaldehyde sterilization processes
— all vaporized hydrogen peroxide sterilization processes
These descriptions are symbols and shall not be translated.
5.7 If the indicator is designed for use in a specific sterilization process, this information shall be stated
or coded on the indicator, or within the technical information leaflet.
For example, if the indicator is designated for use in steam at 121 °C for 15 min, it would appear as
follows:
121 °C 15 min
(See 5.6.)
5.8 Each package of indicators or the technical information leaflet supplied with the package shall
provide the following information:
a) the type or category (see Clause 4), process (see 5.6) and intended use (see 5.7) for which the
indicator is designed;
b) the critical process variable(s) to which the indicator will respond, and where applicable, their SVs;
c) the change that is intended to occur; and for colour change indicators where the colour change
cannot be adequately described, examples of the expected colour range for both changed and
unchanged indicators;
d) instructions for use essential to ensure proper functioning of the indicator;
e) the storage conditions, before and after use;
f) the nature of any change and the time period over which it can occur when completely/incompletely
changed indicators are stored according to the manufacturer’s instructions;
g) any interfering substances that are likely to be encountered, or conditions that are likely to occur,
during the intended use of the indicator and which are known to affect adversely the performance
of the indicator;
h) any safety precautions required during and/or after use;
ISO 11140-1:2014(E)
i) the manufacturer’s or supplier’s name and address; where national or regional regulations require,
for example in the EU, the EU’s authorized representative’s name and address;
j) the expiry date, or the manufacturing date plus shelf-life, under the specified storage conditions,
expressed in accordance with ISO 8601 (e.g. YYYY-MM);
k) a unique code (e.g. lot number) to provide traceability.
NOTE National or regional regulations could contain additional or different requirements.
5.9 The manufacturer shall retain documentary evidence that the indicator, when used as intended by
the manufacturer, does not release any substance known to be toxic in sufficient quantities to cause either
a health hazard, or a hazard to the intended properties of the product being sterilized before, during or
after the sterilization process for which it is designated.
5.10 If the indicator is designed for use with a specific test load only, this information shall be stated or
coded on the indicator, the package of indicators and the technical information leaflet supplied with the
package, together with the symbol (see Figure 1). If the size or format of the indicator does not permit
affixing of the symbol at a size 5 mm or greater, it is permissible to provide this information only on the
package of indicators and the technical leaflet.
Figure 1 — Symbol for designation for use with a specific test load only
6 Performance requirements
6.1 General
6.1.1 Resistometers (see ISO 18472) are used to characterize the performance of the chemical indicators
described in this part of ISO 11140 with the exception of Type 2 indicators (see 4.3). Resistometers
allow for precise specification and control of the specific test conditions and cycle sequences in order to
produce controlled, repeatable studies of the effect of process parameters on indicators. Resistometers
differ from conventional sterilizers; therefore, if conventional sterilizers are used to attempt to duplicate
resistometer conditions, erroneous and/or misleading results can occur.
6.1.2 The condition of the indicator after exposure to a sterilization process, during which all the critical
process variables met or exceeded the specified level to produce a visible change, graduated response or
end point, shall remain unchanged for a period of not less than six months from the date of use, when
stored under the conditions specified by the indicator manufacturer.
6.1.3 If incompletely changed indicators deteriorate on storage, either returning to the unchanged
condition or slowly completing the change reaction, this information shall be stated in the technical
information supplied by the manufacturer [see 5.8 f)].
6.1.4 Indicators for steam processes shall be tested according to the method in 7.4 and the specified
values in 11.7. The visible change or end point shall not be reached.
NOTE The dry heat test is designed to ensure that indicators for steam require the presence of steam in order
to respond.
8 © ISO 2014 – All rights reserved

ISO 11140-1:2014(E)
6.2 Type 1 indicators
6.2.1 After exposure of the indicator, the visible change shall be clearly observable (see Clause 8).
6.2.2 Migration of the indicator agent through the substrate to the surface opposite the one to which
the indicator agent was applied shall not occur before, during or after the sterilization process for which
it is designed, when tested according to the method given in 7.2 (see also 5.9).
6.3 Type 2 indicators
Specific requirements for Type 2 indicators and indicator systems are given in ISO 11140-3, ISO 11140-4,
and ISO 11140-5.
6.4 Types 3, 4, 5 and 6 indicators
6.4.1 After exposure of the indicator to the SVs of critical process variables, the end point shall be clearly
observable.
6.4.2 In use, the indicator agent shall not offset or bleed, penetrate the substrate to which it is applied,
or materials in which it is in contact, unless this is a specific design attribute, before, during, or after the
sterilization process for which it is designed when tested in accordance with the method in 7.2 (see also
5.9).
7 Test methods
7.1 General
Where appropriate, tests for compliance with the requirements for specific indicator types cited in
Clauses 6 to 13 shall be carried out by exposing the indicators to the conditions specified and using
equipment complying with ISO 18472, then examining the indicator for compliance.
Specific test methods for radiation indicators are not given here. Performance requirements for radiation
indicators are given in 8.5.
NOTE Test equipment and metho
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