Mustard Gas
Title: Mustard Gas
CAS Registry Number: 505-60-2
CAS Name: 1,1¢-Thiobis[2-chloroethane]
Additional Names: bis(2-chloroethyl)sulfide; b,-dichloroethyl sulfide; 2,2¢-dichlorodiethyl sulfide; bis(b-chloroethyl)sulfide; 1-chloro-2-(b-chloroethylthio)ethane; sulfur mustard; yellow cross liquid
Trademarks: Kampfstoff "Lost"; Yperite
Molecular Formula: C4H8Cl2S
Molecular Weight: 159.08
Percent Composition: C 30.20%, H 5.07%, Cl 44.57%, S 20.16%
Line Formula: (ClCH2CH2)2S
Literature References: War gas prepd by treating ethylene with sulfur chloride (Levinstein process): Mann, Pope, J. Chem. Soc. 121, 594 (1922); by treating b,-dihydroxyethyl sulfide with HCl gas (German process): Meyer, Ber. 19, 3260 (1886); Ann. 240, 310 (1887); Gomberg, J. Am. Chem. Soc. 41, 1427 (1919). Reactions and derivatives: Helfrich, Reid, ibid. 42, 1208 (1920). Toxicity: Anslow et al., J. Pharmacol. Exp. Ther. 93, 1 (1948). Review of carcinogenic risk: IARC Monographs 9, 181-192 (1975); of toxicology and human exposure: Toxicological Profile for Mustard Gas (PB2004-100006, 2003) 287 pp.
Properties: Oily liquid. Deadly vesicant. Weak, sweet, agreeable odor. On cooling it forms prisms, mp 13-14°. d13 1.338 (solid); d420 1.2741 (liq). bp760 215-217°; bp10 98°. Volatile with steam. nD20 1.53125. Very sparingly sol in water; sol in fat solvents, other common organic solvents. High lipid soly. Vapor pressure: 0.025 mm (0°), 0.90 mm (30°). Hydrolyzed by alkalies. Recommended neutralizing agent and inactivator: Bleaching powder, sodium hypochlorite. LD50 in rats, mice (mg/kg): 3.3, 8.6 i.v. (Anslow).
Melting point: mp 13-14°
Boiling point: bp760 215-217°; bp10 98°
Index of refraction: nD20 1.53125
Density: d13 1.338 (solid); d420 1.2741 (liq)
Toxicity data: LD50 in rats, mice (mg/kg): 3.3, 8.6 i.v. (Anslow)
CAUTION: Overexposure may cause severe irritation and tissue damage to eyes, skin, and respiratory and GI tracts; symptoms may be delayed in onset. This substance is listed as a known human carcinogen: Report on Carcinogens, Eleventh Edition (PB2005-104914, 2004) p III-176.
Use: Formerly in chemical warfare. In biological studies of alkylating agents.

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