516. Ammonium Dithiocarbamate

Nomenclature

CAS number: 513-74-6
Carbamodithioic acid ammonium salt (1:1); ammonium sulfocarbamate; dithiocarbamic acid monoammonium salt.
CH6N2S2; mol wt 110.20.
C 10.90%, H 5.49%, N 25.42%, S 58.19%.
NH2CSSNH4.

Description and references

Prepd from CS2 and NH3: Mathes, Inorg. Synth. 3, 48 (1950); Redemann et al., Org. Synth. coll. vol. III, 763 (1955); Gatlow, Hahnkamm, Z. Anorg. Allg. Chem. 364, 161 (1969). Crystal structure: Cappuchi et al., Chem. Commun. 1966, 44l.

Properties

Yellow, lustrous almost odorless, orthorhombic crystals when fresh. Undergoes a reversible, exothermic transition at 63°; mp 99° (dec). d420 1.451. Sol in water. Decomposes in air, and is then no longer clearly sol; acquires an odor of H2S; the decomposition products contain ammonium thiocyanate, ammonium sulfide, etc. Keep in tightly closed bottles.

Use

Instead of H2S or (NH4)2S for pptg metals in chemical analysis; synthesis of heterocyclic compounds.