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Hazard Predictions

• Corrosive: Reaction products may be corrosive
• Generates gas: Reaction liberates gaseous products and may cause pressurization
• Generates heat: Exothermic reaction at ambient temperatures (releases heat)

Benzene may liberate toxic HX gases upon reaction with the respective diatomic halogens or through reaction with the corresponding acyl halides (Rodd, E. H, Ed. Chemistry of Organic Compounds. New York: Elsevier Publishing Company, 1951. Vol. III pp. 90, 96-97).

The Friedel-Crafts acylation reaction between acyl halides and aromatic hydrocarbons generates HX gas and an aromatic ketone. However, this reaction requires a Lewis acid catalyst such as AlCl3 and will not occur on its own (Loudon, Marc. 2002. Organic Chemistry. 4th ed. New York: Oxford University Press. p. 713).

Potential Gas Byproducts

• Hydrogen Halide (HX)