User Guide to Thresholds and Classification - Environmental ...

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106User Guide for Thresholds and ClassificationsAppendix 7A: Organic peroxide classification: SubclassificationsThe classification steps are complex although methodical. The decision chart in Figure 7.1 identifies thesesteps, which are also summarised in Table 7.2 and set out in detail in Tables 7A.2–7A.7. These indicatesome subtle but important differences in how a substance may end up with an overall classification such ascategory B (7 paths) or category C (11 paths). Because of this, each of these separate paths is identified.This subclassification is not expected to affect packaging or transport labelling controls. It is expected thiswill assist users to identify innate hazards and precautions that should be taken.Each of the broad classifications category A to G is assigned a classification category suffix to indicate theresponse of the substance within the broad classification, to advise the hazardous effects of the substance.The classification suffixes and test result sequences are summarised in Table 7A.1, and shown for eachclassification category in Tables 7A.2–7A.7. While not part of the regulated classification scheme, these‗subclassifications‘ provide useful information for assessment purposes.In the tables below, a substance is assigned to a category if it meets all of the criteria in any of the rowscomprising the table relevant to that category.Table 7A.1: Classification as category A (four possible combination of test results)←Test response----------------------------------------------------------------------------->> Secondary classificationPropagates adetonation UN TestSeries APropagates adetonation as confinedUN Test Series BA 1Propagates adetonation UN TestSeries ADoes not propagate adetonation as confinedUN Test Series BPropagates a rapiddeflagration UN TestSeries CPropagates a rapiddeflagration as confinedUN Test Series DA 2Propagates a partialdetonation UN TestSeries APropagates a rapiddeflagration UN TestSeries CPropagates a rapiddeflagration as confinedUN Test Series DA 3Does not propagate adetonation UN TestSeries APropagates a rapiddeflagration UN TestSeries CPropagates a rapiddeflagration as confinedUN Test Series DA 4January 2012 EPA0109
107User Guide for Thresholds and ClassificationsTable 7A.2: Classification as category B (seven possible combinations of test results)←Test response----------------------------------------------------------------------------->> Secondary classificationPropagates adetonation UNTest Series ADoes notpropagate adetonation asconfined UNTest Series BPropagates arapiddeflagration UNTest Series CDoes notpropagate arapiddeflagration asconfined UNTest Series DViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 1Propagates adetonation UNTest Series ADoes notpropagate adetonation asconfined UNTest Series BPropagates aslowdeflagration orno deflagrationUN Test SeriesCViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 2Propagates apartialdetonation UNTest Series APropagates arapiddeflagration UNTest Series CDoes notpropagate arapiddeflagration asconfined UNTest Series DViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 3Propagates apartialdetonation UNTest Series APropagates aslow or nodeflagration UNTest Series CViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 4Does notpropagate adetonation UNTest Series APropagates arapiddeflagration UNTest Series CDoes notpropagate arapiddeflagration asconfined UNTest Series DViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 5Does notpropagate adetonation UNTest Series APropagates aslowdeflagration UNTest Series CViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 6Does notpropagate adetonation UNTest Series ADoes notpropagate adeflagration UNTest Series CViolent effectwhen heatedunder definedconfinementUN Test SeriesEUndergoes athermalexplosion asconfined UNTest Series GB 7January 2012 EPA0109
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