Explosives compatibility groups

Explosives, See also Explosive chemicals Transportation carriage, 447, 460, 594 compatibility groups, 456 hazard classification, 447, 455 Exposure limits. See Hygiene standards Eye protection, 435... 

Compatibility Group G comprises any substance which is an explosive substance because it is designed to produce an effect by heat, light, sound, gas or smoke, or a combination of these as a result of non-detonative, self-sustaining, exothermic chemical reactions, or an article containing such a substance or an article containing both a substance which is explosive because it is capable by chemical reaction in itself of producing gas at such a temperature and pressure. 

Fire Division 4 These explosives present no significant explosion hazard but have a moderate fire hazard. The effects of fire are usually confined within the package. An external fire would not cause mass explosion of a package of such items. There could be toxic substances in them which may evolve toxic fumes on burning. These explosives belong to UN Compatibility Group K. 

Boracitol. A HE compn listed in Ordn Safety Manual ORDM 7 224(1958),Tables 1904 1905,pp 19-3 19 15 as Storage Compatibility Group L and Explosive Hazard Class 9. The compn props of this HE could not be found in std ref works, reports or in Ord manuals... 

The purpose of the sub-classes 1.1, 1.2, 1.3, 1.4, 1.5 and 1.6 is to characterise the explosive properties of the substances and articles in Class 1 with regard to their activity and to some extent their sensitivity as well. The 13 Compatibility Groups A, B, C, D, E, F, G, H, J, K, L, N and S reflect mainly the specific type of explosives. The Classification Code, consisting of the Sub-Class and Compatibility Group (e.g. 1.1D for a mass-explodable detonating explosive or an article with such a substance), characterises goods in Class 1. 

NOTE 1 Explosive substances or mixtures in packaged form and articles may be classified under divisions 1.1 to 1.6 and, for some regulatory purposes, are further subdivided into compatibility groups A to S to distinguish technical requirements (see UN Recommendations on the Transport of Dangerous Goods, Model Regulations, Chapter 2.1). 

The pictogram for Divisions 1.1, 1.2 and 1.3 is also assigned to substances which have an explosive subsidiary risk, but without the indication of the division number and the compatibility group (see also Self-reactive substances and Organic peroxides ). 

In the explosives hazard class, next to the hazard subclass number on the placard there will be a letter, known as the compatibility group letter. 49 CFR 173.52, Tables... 

Chemicals to be transported must be packaged by the compatibility group and must comply with packaging and transportation requirements (LIR 405-10-01.0, Packaging and Transportation ). Containers that have explosives in them must comply with the requirements contained in the DOE Explosives Safety Manual and the packaging and transportation LIR. Federal DOT regulations in 49 CFR Parts 171-178 provide the guidance for transport, classification, and inspections of cylinders. 

Explosives are further assigned to one of thirteen compatibility groups (A through H, J, K, L, N, S) which identify the explosive article or substance and allow identification of other compatible explosives. 

DOT and GHS explosive classification system recognizes that some kinds of explosives are not compatible with others. During transport or storage, placing incompatible explosives together increases their hazard level. In order to address this issue, DOT identifies 35 compatibility groups and charts the combination of the hazard divisions and compatibility groups. 

An explosive is any substance or device that is designed to function by explosion, such as the extremely rapid release of gas and heat. Class 1 explosives are assigned a division and a compatibility group. The class, division, and compatibility group must be displayed on the hazard label. All explosives, except ammunition, must display an EX number on the package or shipping paper. The EX number is a product code that has been assigned by the associate administrator for hazardous materials. This verifies that the explosive has been... 

Group compatibility data indicates no reaction between propylene dichloride and aluminum oxide (which would form an outside layer on the aluminum metal). However, "heat generation, may cause pressurization" and "forms very unstable explosive metallic compounds" are the results of combining propylene dichloride and aluminum powder (NOAA 2002). 

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