Seeds of black mustard, these are particularly high in sinigrin, from which the pungent-tasting volatile allyl isothiocyanate (allyl mustard oil) is formed.
HMPC: not edited
ESCOP: not edited
Commission E-monograph: for external use in catarrh of the respiratory tract, for segmental therapy as a poultice or mustard plaster in chronic degenerative joint disease and soft tissue rheumatism.
Commercially available "mustard plasters" with a pulpy mustard seed preparation on plaster base; also a tincture (mustard spirit - Spiritus sinapis).