For the purposes of this Chapter, a drug shall be deemed to be adulterated,—
(a) if it consists in whole or in part, of any filthy, putrid or decomposed substance; or
(b) if it has been prepared, packed or stored under insanitary conditions whereby it may have been contaminated with filth or whereby it may have been rendered injurious to health; or
(c) if its container is composed, in whole or in part, of any poisonous or deleterious substance which may render the contents injurious to health; or
(d) if it bears or contains, for the purposes of colouring only, a colour other than one which is prescribed; or
(e) if it contains any harmful or toxic substance which may render it injurious to health; or
(f) if any substance has been mixed therewith so as to reduce its quality or strength.