Title: Ammonium Sulfamate
CAS Registry Number: 7773-06-0
CAS Name: Sulfamic acid monoammonium salt
Additional Names: AMS
Trademarks: Ammate (DuPont)
Molecular Formula: H6N2O3S
Molecular Weight: 114.12
Percent Composition: H 5.30%, N 24.55%, O 42.06%, S 28.10%
Line Formula: NH4SO3NH2
Literature References: Weed-killing prepn: Cupery, Tanberg, US 2277744 (1941 to du Pont). Prepn from ammonia and sulfamic acid: Sisler, Audrieth, Inorg. Synth. 2, 180 (1946). Toxicity study: Ambrose, J. Ind. Hyg. Toxicol. 25, 26 (1943).
Properties: Hygroscopic crystals (large plates). mp 131°, dec 160°. Extremely soluble in water, liquid NH3; slightly soluble in ethanol; moderately soluble in glycerol, glycol, formamide. pH of 0.27M soln in H2O = 4.9. Aq solns are stable to boiling. LD50 orally in rats: 3.0 g/kg (Ambrose).
Melting point: mp 131°
Toxicity data: LD50 orally in rats: 3.0 g/kg (Ambrose)
CAUTION: Potential symptoms of overexposure are irritation of eyes, nose and throat; coughing, dyspnea. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 16.
Use: In the manuf of fire-retardant compositions, for flameproofing textiles and paper products; in the manuf of weed killing compositions; in electroplating solns; for the generation of nitrous oxide gas.