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104User Guide for Thresholds and Classificationssubstance is a liquid mixture that contains a solvent or desensitising agent, that solvent or desensitisingagent is an organic liquid that has a boiling point greater than or equal to 150°C .These classification criteria are summarised in Table 7.9. A substance is assigned to this category if itmeets all of the criteria in the row comprising the table.Table 7.9: Criteria for allocation to organic peroxide category Gi.Does notpropagate adetonation UNTest Series ADoes notpropagate adeflagrationUN Test SeriesCLow or noeffect whenheated underdefinedconfinementUN Test SeriesEIntended to bestored ortransported inbulkNo explosivepower UN TestSeries FNo effect whenheated underdefinedconfinementUN Test SeriesE*Note* The self-accelerating thermal decomposition temperature from Test Series H is greater than or equal to 60°C fora 50 kg quantity of the substance, and ,if the substance is a liquid mixture containing a solvent or desensitisingagent, that solvent or desensitising agent is an organic liquid with a boiling point greater than or equal to 150°C.7.7. DiscussionClassification of category E, F, or G is provided only for substances that in response to Test Series A do notdetonate, and in response to Test Series C do not deflagrate, and in response to Test Series E show either alow or no effect of heating under confinement. These classifications determine the degree to which theexplosive power or heating under confinement may be related to quantities in excess of 50 kg. Where thisdata is not sought, classification of category D is sufficient.That is, if a substance does not meet the criteria for a 5.2A, 5.2B, or 5.2C hazard classification, then a 5.2Dhazard classification applies, unless sufficient data is provided that show the effects meet the criteria forhazard classification 5.2E, 5.2F, or 5.2G.7.7.1. Multiple hazards classificationA substance may have more than one hazard classification where this is necessary to indicate differentclassifications according to different physical forms of the substance, if it is a solid, or different concentrationsof the substance, if it is a mixture, or has been desensitised or otherwise chemically altered to modify itsoxidising effects.Where a substance is made up of a mixture of one or more substances above the threshold for an organicperoxide and one or more substances that are not, it may, on testing, fail to meet the threshold criteria for anorganic peroxide. In this case, the substance mixture is classified as not hazardous based on the oxidisingproperty of the mixture.January 2012 EPA0109
105User Guide for Thresholds and ClassificationsReferencesASTM 2006. Test Method for Determining Whether a Material is a Liquid or a Solid, ASTM D4359-90.American Society for Testing and Materials, Philadelphia, PA.ISO 1996. Gases and Gas Mixtures: Determination of Fire Potential and Oxidising Ability for the Selection ofCylinder Valve Outlets, ISO 10156:1996. International Organization for Standardization, Geneva.United Nations 1994. European Agreement Concerning the International Carriage of Dangerous Goods byRoad. United Nations, Geneva.United Nations 1999a. Recommendations on the Transport of Dangerous Goods Manual of Tests andCriteria, 3rd revised edition. United Nations, New York and Geneva. (Note: Equivalent material can be foundin more recent versions of this document, for example, the 4th revised edition. Some material is available forpurchasing and downloading from http://www.unece.org/trans/danger/danger.htm.)United Nations 1999b. Recommendations on the Transport of Dangerous Goods Model Regulations, 11threvised edition. United Nations, New York and Geneva. (Note: Equivalent material can be found in morerecent versions of this document, for example, the 15th revised edition. Some material is available forpurchasing and downloading from http://www.unece.org/trans/danger/danger.htm.)January 2012 EPA0109
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