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Hazardous Products Regulations

Version of section 7.4.1 from 2015-02-11 to 2022-12-14:

Marginal note:Category

 An oxidizing gas is classified in the category of this hazard class in accordance with the following table:


Column 1Column 2
1Oxidizing Gases — Category 1A gas that has an oxidizing power > 23.5% based on one of the methods set out in the International Organization for Standardization standard ISO 10156:2010 entitled Gases and gas mixtures — Determination of fire potential and oxidizing ability for the selection of cylinder valve outlets, as amended from time to time

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