An aqueous solution of hydrogen cyanide. Also known as prussic acid.
a solution of hydrogen cyanide, HCN, in water; a weak toxic acid, made use of as a fumigant
a solution of hydrogen cyanide in liquid; poor solutions are employed in fumigating plus the synthesis of organic compounds
a colorless, mobile, volatile fluid, HCN, having a characteristic peach-blossom odor. It is perhaps one of the most deadly poisons. It's produced by the action of sulphuric acid on yellowish prussiate of potassium (potassium ferrocyanide), and chemically resembles hydrochloric and hydrobromic acids. Called in addition prussic acid, hydrogen cyanide, etc.