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Standard
ISO 14456
Second edition
Gas cylinders — Gas properties and
2024-04
associated classification (FTSC) codes
Bouteilles à gaz — Propriétés des gaz et codes de classification
associés (FTSC)
Reference number
ISO 14456:2024(en) © ISO 2024
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ISO 14456:2024(en)
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© ISO 2024
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Published in Switzerland
© ISO 2024 – All rights reserved
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ISO 14456:2024(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Gas properties - Numerical gas code (FTSC) . 2
4.1 General .2
4.2 Fire potential, category I .2
4.3 Acute toxicity, category II .2
4.4 State of the gas (in the cylinder at 15 °C), category III .3
4.5 Corrosiveness, category IV .3
5 List of gases and liquids with the corresponding FTSC codes . 4
5.1 Basic principles and single gases .4
5.2 Assignment of a gas mixture to a group .4
5.3 Tables of compatible groups of gases and liquids .5
Annex A (informative) Chemical and hazard data related to additional proposed FTSC entries . 19
Bibliography .43
© ISO 2024 – All rights reserved
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ISO 14456:2024(en)
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 b
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