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Cyanide is unstable in water, but the reaction is slow until about 170 °C. It undergoes hydrolysis to give ammonia and formate, which are far less toxic than cyanide: [14] CN − + 2 H 2 O → HCO − 2 + NH 3. Cyanide hydrolase is an enzyme that catalyzes this reaction.
A hydrogen cyanide concentration of 100–200 ppm in breathing air will kill a human within 10 to 60 minutes. [68] A hydrogen cyanide concentration of 2000 ppm (about 2380 mg/m 3) will kill a human in about one minute. [68] The toxic effect is caused by the action of the cyanide ion, which halts cellular respiration.
Potassium cyanide is a compound with the formula KCN. It is a colorless salt, similar in appearance to sugar, that is highly soluble in water. Most KCN is used in gold mining, organic synthesis, and electroplating. Smaller applications include jewellery for chemical gilding and buffing. [4]
Pseudohalogens occur in pseudohalogen molecules, inorganic molecules of the general forms Ps–Ps or Ps–X (where Ps is a pseudohalogen group), such as cyanogen; pseudohalide anions, such as cyanide ion; inorganic acids, such as hydrogen cyanide; as ligands in coordination complexes, such as ferricyanide; and as functional groups in organic ...
Ammonium chlorate – [NH 4]ClO 3 [40] Ammonium cyanide – [NH 4]CN [41] Ammonium dichromate – [NH 4] 2 Cr 2 O 7 [42] Ammonium dihydrogen phosphate – [NH 4]H 2 PO 4; Ammonium hexafluoroaluminate – AlF 6 H 12 N 3 [43] Ammonium hexafluorophosphate – F 6 H4 NP [44] Ammonium hexachloroplatinate – [NH 4] 2 [PtCl 6] [45] Ammonium ...
Caesium is a relatively rare element, estimated to average 3 parts per million in the Earth's crust. [65] It is the 45th most abundant element and 36th among the metals. [ 66 ] Caesium is 30 times less abundant than rubidium , with which it is closely associated, chemically.
Structure and AFM image of dehydrobenzo[12]annulene, where benzene rings are held together by triple bonds. A triple bond in chemistry is a chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond.
This list is sorted by boiling point of gases in ascending order, but can be sorted on different values. "sub" and "triple" refer to the sublimation point and the triple point, which are given in the case of a substance that sublimes at 1 atm; "dec" refers to decomposition. "~" means approximately.