Section 2(1)(b) in Drugs (Prices Control) Order, 2013
(b)"active pharmaceutical ingredients or bulk drug" means any pharmaceutical, chemical, biological or plant product including its salts, esters, isomers, analogues and derivatives, conforming to standards specified in the Drugs and Cosmetics Act, 1940 (23 of 1940) and which is used as such or as an ingredient in any formulation;