Amprolium Hydrochloride

Amprolium Hydrochloride Chemical formula
Synonyms: Amprolii Hydrochloridum; Amprolium, Chlorhydrate d’; Hidrocloruro de amprolio. 1-(4-Amino-2-propylpyrimidin-5-ylmethyl)2-methylpyridinium chloride hydrochloride.
Cyrillic synonym: Ампролия Гидрохлорид.

Chemical information

Chemical formula: C14H19ClN4,HCl = 315.2.
CAS — 121-25-5 (amprolium); 137-88-2 (amprolium hydrochloride).


In Fr. and US for veterinary use only. Also in BP(Vet).

BP(Vet) 2008

(Amprolium Hydrochloride). A white or almost white, odourless or almost odourless powder. Freely soluble in water; slightly soluble in alcohol; practically insoluble in chloroform; very slightly soluble in ether.

USP 31

(Amprolium). A white to light yellow powder. Freely soluble in water, in alcohol, in dimethylformamide and in methyl alcohol; sparingly soluble in dehydrated alcohol; practically insoluble in acetone, in butyl alcohol, and in isopropyl alcohol.


Amprolium hydrochloride is an antiprotozoal used in veterinary practice, alone or with other drugs such as ethopabate, for the control of coccidiosis in pigeons and in poultry.
Published October 11, 2018.