Nomenclature
CAS number: 108-98-5
Benzenethiol; phenylmercaptan; phenylthiol.
C
6H
6S; mol wt 110.18.
C 65.41%, H 5.49%, S 29.10%.
Description and references
Prepd by the reduction of benzenesulfonyl chloride
with zinc dust in sulfuric acid: Adams,
Marvel, Org. Synth. 1, 71 (1921).
Properties
Liquid. Repulsive, penetrating, garlic-like odor,
esp when impure. d425 1.0728; bp760 168.3°; bp100 103.6°; bp50 86.2°; bp20 69.7°; bp1.0 18.6°; nD25 1.58603. Heat of fusion 24.90 cal/g; spec heat at
25°: 0.3829; entropy at 25°: 52.6. Insol in water. Very sol in
alc; miscible with ether, benzene, CS2. Feebly acidic.
Oxidizes in air, esp when dissolved in alcoholic ammonia, forming
diphenyl disulfide, C6H5SSC6H5. The hydrogen of the SH group is easily replaced by metals.Caution
Potential symptoms of overexposure
are irritation of eyes, skin and respiratory system; dermatitis; cyanosis;
coughing, wheezing, dyspnea, pulmonary edema, pneumonitis; headache,
dizziness, CNS depression; nausea, vomiting; kidney, liver and spleen
damage. See NIOSH Pocket Guide
to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 26.