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36User Guide for Thresholds and ClassificationsA flammable substance is classified as having a particular hazard classification if it meets the criteria set outin the table in Schedule 2 to the Hazardous Substances (Classification) Regulations 2001 for that hazardclassification.The classification schemes for the various subclasses of flammable substances are summarised in Table3.1.Note that in the case of subclass 4.1.2 (self-reactive flammable solids), if a substance does not meet thecriteria for a 4.1.2A, 4.1.2B, or 4.1.2C hazard classification, then a 4.1.2D classification applies, unlesssufficient data are provided that show that the substance meets the criteria for hazard classification 4.1.2E,4.1.2F, or 4.1.2G. With respect to the criteria in the Hazardous Substances (Classification) Regulations 2001for subclass 4.1.2, Test Series A–G refer to the tests for self-reactive substances and organic peroxides insections 21–27, respectively, of the UN Manual of Tests and Criteria.January 2012 EPA0109
37User Guide for Thresholds and ClassificationsTable 3.1: Flammable property classificationCategoryof hazardSubclass of flammable hazardGases *Aerosols2.1.12.1.2Liquids3.1Liquiddesensitisedexplosives3.2Flammablesolids4.1.1Self-reactiveflammablesolids †4.1.2Desensitisedexplosives ‡4.1.3Spontaneouslycombustiblesubstances §4.2Substancesdangerouswhen wet #4.3A Ignitable at 13%volume in air or havea flammable rangewith air of 12%,regardless of LFLPressurisedmixturecontaining agas,compressed,liquefied, ordissolvedunderpressure;comprising5%, by mass,flammableingredients;under apressure> 100 kPa3.1AFlashpoint (closedcup)< 23 o C and initialboiling point 35 o C(equivalent to UNPG I)3.2A(equivalent toUN PG I)4.1.1A(equivalent toUN PG II)4.1.2A4.1.3A(equivalent toUN PG I)4.2APyrophoricsubstances(equivalent toUN PG I)4.3A(equivalent toUN PG I)BHave a flammablerange in mixture inair, otherthan those incategory A3.1BFlashpoint (closedcup) < 23 o C butinitial boiling point> 35 o C(equivalent to UNPG II)3.2B(equivalent toUN PG II)4.1.1B(equivalent toUN PG III)4.1.2B4.1.3B(equivalent toUN PG II)4.2BSelf-heatingsubstances(equivalent toUN PG II)4.3B(equivalent toUN PG II)January 2012 EPA0109
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