Source, Etc

The oil expressed from the seeds of Brassicasinapioides, Roth, and of Brassica alba, Boissier. (Compare ' Black Mustard Seeds.')

Description, Etc

Brownish-yellow; specific gravity 0.914 to 0.920; congealing point - 17°; iodine value 96 to 110 (black mustard) or 92 to 97 (white mustard). Constituents similiar to those of rape oil; used as a mildly stimulating embrocation; also for lubricating, burning and soap-making.