Major Category
Nitrogen Compounds
Synonyms
2-Thiopseudourea; 2-Thiourea; Isothiourea; Pseudothiourea; Pseudourea, 2-thio-; Sulourea; THU; Thiocarbamide; Thiocarbonic acid diamide; Thiomocovina [Czech]; Thiourea; Thiuronium; Tsizp 34; Urea, 2-thio-; Urea, thio-; beta-Thiopseudourea; Urea, 2-thio-; Urea, thio- (8CI); [ChemIDplus] UN2811
Category
Thiourea Compounds
Description
White or off-white crystals or powder; [CAMEO]
Sources/Uses
Used in compounds to clean silver and copper; also used in diazo copy paper; [Kanerva, p. 1839] Used in photography (toning solution); [www.ci.tucson.az.us/arthazards/medium.html]
Comments
Thiourea (thiocarbamide) has been used as a fixative in photography and photocopying. It has also been used as a rubber and neoprene antioxidant. Photocontact dermatitis caused by thiourea has been observed in users of shoe insoles, adhesive tape, wet suits, and neoprene weather strips. Alkylated thioureas include diethylthiourea (DTU), Diphenylthiourea (DPTU), Ethylenethiourea (ETU), Dimethylthiourea (DMTU), and ethylbutylthiourea (EBTU). [Marks, 239-40] Danger of skin sensitization and photo-contact sensitization; [MAK] See "Ethylene thiourea,"
Vapor Pressure
0.0028 mm Hg
Lethal Concentration
LC50 (rat) > 900 mg/m3/4h
Dermatotoxin
PACD (photoallergic contact dermatitis)
IARC Carcinogen
Not classifiable
NTP Carcinogen
Anticipated human carcinogen
Diseases
Occupational diseases associated with exposure to this agent:
Processes
Industrial Processes with risk of exposure: