CAS Registry Number: 86-88-4
CAS Name: 1-Naphthalenylthiourea
Additional Names: 1-(1-naphthyl)-2-thiourea; a-naphthylthiourea; N-1-naphthylthiourea; a-naphthylthiocarbamide; krysid; chemical 109
Trademarks: Anturat; Bantu; Rattrack
Molecular Formula: C11H10N2S
Molecular Weight: 202.28
Percent Composition: C 65.31%, H 4.98%, N 13.85%, S 15.85%
Literature References: Prepd from a-naphthylamine and ammonium or potassium or sodium thiocyanate: de Clermont, Wehrlin, Bull. Soc. Chim.  26, 125 (1876); Alvarez, C.A. 42, 4560 (1948); from a-naphthylisothiocyanate by treatment with alcoholic ammonia: Dyson, Hunter, Chem. News 134, 4 (1927). Rodenticide activity: Richter, J. Am. Med. Assoc. 129, 927 (1945). Review of carcinogenic risk: IARC Monographs 30, 347-357 (1983).
Properties: Prisms from alc. Bitter taste. mp 198°. Solubility in water at 25°: 0.06 g/100 ml; in acetone: 2.43 g/100 ml; in triethylene glycol: 8.6 g/100 ml. Fairly sol in hot alc.
Melting point: mp 198°
CAUTION: Potential symptoms of toxicity following ingestion of large doses are vomiting, dyspnea, cyanosis and coarse pulmonary rales; liver damage. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 20. May cause glomerular injury in nonlethal poisonings. See Clinical Toxicology of Commercial Products, R. E. Gosselin et al., Eds. (Williams & Wilkins, Baltimore, 5th ed., 1984) Section III, p 40-42.
Use: Rodenticide. Specific control for the adult Norway rat; less toxic to other rat species.