Title: Clopidol
CAS Registry Number: 2971-90-6
CAS Name: 3,5-Dichloro-2,6-dimethyl-4-pyridinol
Additional Names: meticlorpindol; clopindol
Trademarks: Coyden (Dow)
Molecular Formula: C7H7Cl2NO
Molecular Weight: 192.04
Percent Composition: C 43.78%, H 3.67%, Cl 36.92%, N 7.29%, O 8.33%
Literature References: Prepn: Stevenson, US 3206358 (1965 to Dow). Metabolism studies in chickens: Smith, Poult. Sci. 48, 420 (1969). Toxicity study: Plisek et al., Vet. Spofa 12, 111 (1970), C.A. 74, 138780p (1971).
Properties: Solid, mp >320°. Practically insol in water. LD50 orally in rats: 18 g/kg (Plisek).
Melting point: mp >320°
Toxicity data: LD50 orally in rats: 18 g/kg (Plisek)
CAUTION: Potential symptoms of overexposure are irritation of eyes, skin, nose, throat; cough. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 72.
Therap-Cat-Vet: Coccidiostat.
Clopirac Cloprednol Cloprostenol Clopyralid Cloquintocet-Mexyl

Systematic (IUPAC) name
Clinical data
Trade names Coyden
AHFS/ International Drug Names
Legal status  ?
CAS number 2971-90-6
ATC code None
PubChem CID 18087
ChemSpider 17084
KEGG D03559 YesY
Chemical data
Formula C7H7Cl2NO 
Mol. mass 192.04 g/mol
 YesY (what is this?)  (verify)

Clopidol is an organic compound that is used as in veterinary medicine as a coccidiostat. It is prepared industrially by a multistep process from dehydroacetic acid.[1]