Active ingredient of marking nut is ?
a) Semecarpol
b) Crotin
c) Abrin
d) None
Correct Answer - A
Ans. is ‘a’ i.e., Semecarpol
Semicarpus anacardium or marking nut or bhilawan
Its seed are heart shaped, conical and black with acrid oily juice
which is brownish but turns black on exposure to air.
Active principles are semecarpol and bhilawanol.
Juice applied to skin produces irritation, painful blisters followed by
itching and eczema. Therefore it is used to produce artificial bruises.
It is also used by washerman to mark clothes.