a colorless poisonous gas, HCN, having a bitter almondlike odor: in aqueous solution it forms hydrocyanic acid.
a colourless poisonous liquid with a faint odour of bitter almonds, usually made by a catalysed reaction between ammonia, oxygen, and methane. It forms prussic acid in aqueous solution and is used for making plastics and dyes and as a war gas. Formula: HCN Also called hydrocyanic acid
hydrogen cyanide n.
A colorless, volatile, extremely poisonous flammable liquid miscible in water and used in the manufacture of dyes and fumigants.
A colorless, flammable, extremely poisonous liquid. Salts derived from it have many industrial uses, such as hardening iron and steel, extracting metals from ores, electroplating metallic surfaces, and making acrylonitrile, from which acrylic fibers and plastics are produced. It is also used to make dyes and poisons. A solution of hydrogen cyanide in water forms a colorless acid called hydrocyanic acid. Chemical formula: HCN.
- Hydrogen donor
hydrogen donor n. A substance or compound that gives up or transfers a hydrogen atom to another substance.
noun 1. a standard reference electrode with a potential of zero, used in pH measurements, consisting of a platinum-black surface covered with hydrogen bubbles.
- Hydrogen embrittlement
/ɪmˈbrɪtəlmənt/ noun 1. (engineering) the weakening of metal by the sorption of hydrogen during a pickling process, such as that used in plating
noun 1. a colorless corrosive gas, HF, the anhydride of hydrofluoric acid, used chiefly as a catalyst and in the fluorination of hydrocarbons. noun 1. a colourless poisonous corrosive gas or liquid made by reaction between calcium fluoride and sulphuric acid: used as a fluorinating agent and catalyst. Formula: HF 2. an aqueous solution of […]