Seeds of white mustard, these are dominated by sinalbin (see under glucosinolates) which after hydrolysis converts to p-hydroxybenzyl isothiocyanate (pungent tasting, non-volatile).
HMPC: not edited
ESCOP: not processed
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.
Empirical medicine: neuralgia, rheumatic complaints, flu-like infections.
Commercially available are "mustard plasters" with a pulpy mustard seed preparation on plaster base; also a tincture (mustard spirit - Spiritus sinapis).