In linseed & soybean oils. Naturally occurring in food; in refrigerants; metal degreasing; production of semiconductors; Fumigant. Insecticide. Industrial solvent. Intermediate. Degreaser for metals. Heat transfer medium; Insecticidal fumigant, germicide, intermediate, dyes, in pharmaceuticals, deodorant for garbage, Fumigant & insecticide; in manufacture chlorophenols, arylene sulfide polymers. Associated with tobacco: reported either as a natural component of tobacco, pyrolysis product (in tobacco smoke), or additive for one or more types of tobacco products.