Peroxides hazard

Boyars, An Evaluation of Organic Peroxide Hazard Classification Systems and Test Methods , NOLTR 72-63 (1972) 23) L.F. Martin, "Or-... 

Watts, R.J., Kong, S., Dippre, M., and Barnes, W.T., Oxidation of sorbed hexachlo-robenzene using catalyzed hydrogen peroxide, /. Hazard. Mater., 39,33-37,1994. 

Sundstrom, D.W., Klei, H.E., Nalette, T.A., Reidy, D.J., and Weir, B.A., Destruction of halogenated aliphatics by ultraviolet catalyzed oxidation with hydrogen peroxide, /. Hazardous Waste Hazardous Mater., 3(1), 101-110, 1986. 

There is a long history of laboratory and plant fires and explosions involving the very high flammability and/or tendency to peroxide formation in these widely used solvents, diisopropyl ether being the most notorious. Methods of controlling peroxide hazards in the use of ethers have been reviewed [1], and information on storage, handling, purification [2,3] and disposal [4] have been detailed. 

Severe peroxide hazard on storage with exposure to air Discard within 3 months Diisopropyl ether Sodium amide (sodamide)... 

Peroxide hazard on concentration Do not distill or evaporate without first testing for the presence of peroxides Discard or test for peroxides after 6 months... 

Peroxide hazard on storage discard after 3 months ... 

May canse peroxide hazard discard after 1 year ... 

Flammability classifications for a selection of solvents (and some other substances) are given in Table 11.7. The chemicals are listed in order of increasing boiling point to the nearest 1°C. Solvents in Table 11.7 that are also peroxidation hazards may be identified from data in Tables 11.11 and 11.12. 

Peroxide hazard classification expert systems development at FM/Norwood is presently on hold until some of the resources noted become available. We have a way to go before a fully validated classification model is complete. At the same time, we are continuing to explore the possibility of using chemical database programs such as those available from Molecular Design Inc. and the University of Santiago, Chile (ARIUSA) as components of our chemical hazard expert systems. We are also looking at chemical databases on optical disc such as those available from DuPont, Aldrich, Micromedix and the Canadian Center for Occupational Safety and Health as components of future systems. 

Peroxide hazard on concentration do not distill or evaporate without first testing for the presence of peroxides. Date containers when opened and discard or test for peroxides 6 months after opening. On small fires, use dry chemical powder (such as Purple-K-Powder), alcohol-resistant foam, water spray, or COj extinguishers. 

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