Mustard oil is of vegetable origin and is obtained from seeds of the black and white (Sinapis alba) mustard plants. In the crude state, black mustard oil (Brassica nigra, light color) has a spicy odor and a pungent taste. When refined it is neutral in odor and taste. White mustard oil (yellow color) has a bitingly pungent taste due to the allyl mustard oil it contains. See also IMDG Code & US CFR.
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