The Probert Encyclopaedia of Science & Technology

HYDROCYANIC ACID

Hydrocyanic Acid (Prussic Acid) was discovered by Scheele in 1782, and first prepared in a pure state by Gay-Lussac in 1811. It is found in the kernels of bitter almonds, peaches, apricots, plums, cherries and quinces and various plants leaves including beech, cherry and laurel. It is one of the most toxic substances known and is used to prepare cyanide. Hydrocyanic acid was originally known as Prussic acid on account of being the acid of Prussian Blue.
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