Hydrogen cyanide (formerly known as prussic acid) is a chemical compound with the formula HCN and structural formula H−C≡N. It is a highly toxic and flammable liquid that boils slightly above room temperature, at 25.6 °C (78.1 °F).

2025年1月4日 · Hydrogen cyanide, a highly volatile, colorless, and extremely poisonous liquid. A solution of hydrogen cyanide in water is called hydrocyanic acid, or prussic acid. It was discovered in 1782 by a Swedish chemist, Carl Wilhelm Scheele, who prepared it …

Hydrocyanic acid is the solution of hydrogen cyanide in water. It is a highly poisonous chemical, also called as prussic acid. Formula and structure: The chemical formula of hydrocyanic acid is HCN.

Hydrocyanic acid is a liquid of hydrogen cyanide in water. The chemical formula of Hydrocyanic acid is HCN. Hydrocyanic acid is a colourless liquid whose vapour is lighter than air and dissipates rapidly. It is usually sold commercially as an aqueous solution containing 2 to 10% hydrogen cyanide.

At room temperature, hydrogen cyanide is a volatile, colorless-to-blue liquid (also called hydrocyanic acid). It rapidly becomes a gas that can produce death in minutes if breathed.

Also known as hydrocyanic acid (CAS Registry Number 74‐90‐8) or HCN, hydrogen cyanide is a rapid‐acting lethal agent that inhibits aerobic respiration at the cellular level, preventing cells from utilizing oxygen.

Hydrocyanic acid, also known as prussic acid or hydrogen cyanide (HCN), is an unstable, colorless, and extremely poisonous liquid that boils slightly above room temperature at 26 °C (78.8 °F). Discovered by Swedish chemist Carl Wilhelm Scheele in 1782, it has a pungent odor of almonds, which is detectable at concentrations above 5 ppm.

Carbon dioxide from the air is sufficiently acidic to liberate HCN from aqueous solutions of hydrocyanic acid [Lewis]. The solution also can evolve gaseous hydrogen cyanide when heated. Inhalation of gaseous HCN is quickly fatal by respiratory arrest.

The meaning of HYDROCYANIC ACID is an aqueous solution of hydrogen cyanide HCN that is a poisonous weak acid and is used chiefly in fumigating and in organic synthesis.

Hydrogen cyanide / hydrocyanic acid. Hydrogen cyanide (formula HCN) or prussic acid is a colourless to slightly yellowish liquid when it is pure. It is also flammable, soluble in water and highly volatile.