Title: Metizoline
CAS Registry Number: 17692-22-7
CAS Name: 4,5-Dihydro-2-[(2-methylbenzo[b]thien-3-yl)methyl]-1H-imidazole
Additional Names: 2-[(2-methylbenzo[b]thien-3-yl)methyl]-2-imidazoline; 2-methyl-3-(D2-imidazolinylmethyl)benzo[b]thiophene; benazoline (obsolete)
Molecular Formula: C13H14N2S
Molecular Weight: 230.33
Percent Composition: C 67.79%, H 6.13%, N 12.16%, S 13.92%
Literature References: a-Adrenergic agonist. Prepn: FR M1614; FR 1355049 (1963, 1964 both to E. Merck), C.A. 58, 12574e (1963); 61, 4146e (1964). Pharmacology and toxicity: G. F. Rosati, M. G. Poletto, Farmaco Ed. Prat. 21, 204 (1966).
Properties: Crystals, mp 156-157°.
Melting point: mp 156-157°
Derivative Type: Hydrochloride
CAS Registry Number: 5090-37-9
Molecular Formula: C13H14N2S.HCl
Molecular Weight: 266.79
Percent Composition: C 58.53%, H 5.67%, N 10.50%, S 12.02%, Cl 13.29%
Properties: Crystalline powder, mp 244-246°. Slightly sol in water; very sol in ethanol, methanol. Practically insol in chloroform. LD50 in mice (mg/kg): 49 i.p.; 9.1 i.v.; 155 orally; in rats (mg/kg): 74 orally (Rosati, Poletto).
Melting point: mp 244-246°
Toxicity data: LD50 in mice (mg/kg): 49 i.p.; 9.1 i.v.; 155 orally; in rats (mg/kg): 74 orally (Rosati, Poletto)
Status: This monograph has been retired and is no longer subject to revision or update.

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