User Guide to Thresholds and Classification - Environmental ...

80User Guide for Thresholds and Classifications7. Substances with Oxidising Properties – Class 57.1. IntroductionSubstances that have the capacity to oxidise are assessed for their ability to promote fire, usually byproviding oxygen and releasing chemical energy. The Hazardous Substances and New Organisms Act 1996(HSNO Act) thresholds distinguish between two categories: those that are organic peroxides and those thatare not.For both types of oxidising substances, the Recommendations on the Transport of Dangerous Goods ModelRegulations (United Nations, 1999b) (UN Model Regulations) test criteria have been adopted for theestablishment of the HSNO Act thresholds and classification levels. The thresholds are equivalent to thelimits already used in practice by the Chief Inspector of Dangerous Goods under the Dangerous Goods Act1974.Swimming pool cleaner (calcium hypochlorite) is an example of a substance that would be included, whileorganic peroxide mixtures with less than 1% available oxygen would be excluded, for example, some antiacneskin treatments where benzoyl peroxide is the active ingredient.7.2. DefinitionsThe following terms are used in the Hazardous Substances (Minimum Degrees of Hazard) Regulations 2001and Hazardous Substances (Classification) Regulations 2001 in respect of substances with oxidisingproperties, or relate to the classification criteria.Termas defined in UN Test Series Aas defined in UN Test Series Bas defined in UN Test Series Cas defined in UN Test Series Das defined in UN Test Series EDefinitionTested using the procedures specified in section 21, pp 197–212, of the UNManual of Tests and Criteria, and includes both the testing methods anddescriptions of the results contained in that section.Tested using the procedures specified in section 22, pp 213–216, of the UNManual of Tests and Criteria, and includes both the testing methods anddescriptions of the results contained in that section.Tested using the procedures specified in section 23, pp 217–228, of the UNManual of Tests and Criteria, and includes both the testing methods anddescriptions of the results contained in that section.Tested using the procedures specified in section 24, UN, pp 229–231, of theUN Manual of Tests and Criteria, and includes both the testing methods anddescriptions of the results contained in that section.Tested using the procedures specified in section 25, pp 233–247, of the UNManual of Tests and Criteria, and includes both the testing methods anddescriptions of the results contained in that section.January 2012 EPA0109