Title: Carnidazole
CAS Registry Number: 42116-76-7
CAS Name: [2-(2-Methyl-5-nitro-1H-imidazol-1-yl)ethyl]carbamothioic acid O-methyl ester
Additional Names: O-methyl [2-(2-methyl-5-nitroimidazol-1-yl)ethyl]thiocarbamate
Manufacturers' Codes: R-25831
Trademarks: Spartrix (Janssen)
Molecular Formula: C8H12N4O3S
Molecular Weight: 244.27
Percent Composition: C 39.34%, H 4.95%, N 22.94%, O 19.65%, S 13.13%
Literature References: Prepn and antiprotozoal activity: J. Heeres et al., DE 2429755; eidem, US 3928374 (both 1975 to Janssen); eidem, Eur. J. Med. Chem. - Chim. Ther. 11, 237 (1976). Crystal structure of monohydrate: N. M. Blaton et al., Acta Crystallogr. B35, 753 (1979). Clinical efficacy in vaginal trichomoniasis: A. Notowicz et al., Br. J. Vener. Dis. 53, 129 (1977); P. Chaudhuri, A. C. Drogendijk, Eur. J. Obstet. Gynecol. Reprod. Biol. 10, 325 (1980).
Properties: Crystals from ethanol, mp 142.4° (dec).
Melting point: mp 142.4° (dec)
Therap-Cat-Vet: Antiprotozoal (Trichomonas).
Carnitine Carotol Caroverine Caroxazone Carpaine

Systematic (IUPAC) name
O-Methyl [2-(2-methyl-5-nitro-1H-imidazol-1-yl)ethyl]carbamothioate
Clinical data
Trade names Spartix
AHFS/ International Drug Names
Legal status  ?
CAS number 42116-76-7
ATCvet code QP51AA09
PubChem CID 3032998
ChemSpider 2297829
Synonyms R 25831
Chemical data
Formula C8H12N4O3S 
Mol. mass 244.271 g/mol
Physical data
Melt. point 124.4 °C (256 °F) [1]

Carnidazole is an antiprotozoal drug of the nitroimidazole class used in veterinary medicine. It is used to treat Trichomonas infection.[1]