Title: Erythromycin Estolate
CAS Registry Number: 3521-62-8
CAS Name: Erythromycin 2￠-propanoate dodecyl sulfate (salt)
Synonyms: erythromycin propionate lauryl sulfate; lauryl sulfate salt of the propionic acid ester of erythromycin; propionylerythromycin lauryl sulfate
Trademarks: Eritroger (Isnardi); Eromycin; Ilosone (Lilly); Lauromicina (Dukron); Neo-Erycinum (Schering AG); PELS; Roxomicina; Stellamicina; Eriscel (Rachelle); Estomicina (Bergamon); Eupragin (Alcon-Thilo); Marcoeritrex; Togiren (Schwarzhaupt)
Molecular Formula: C52H97NO18S
Molecular Weight: 1056.39
Percent Composition: C 59.12%, H 9.26%, N 1.33%, O 27.26%, S 3.04%
Line Formula: C40H71NO14.CH3(CH2)11OSO3H
Literature References: Prepn from propionyl erythromycin: Stephens
et al., J. Am. Pharm. Assoc. 48, 620 (1959); Bray, Stephens,
US 3000874 (1961 to Lilly). Toxicity: E. I. Goldenthal,
Toxicol. Appl. Pharmacol. 18, 185 (1971). Comprehensive description: J. M. Mann,
Anal. Profiles Drug Subs. 1, 101-117 (1972). For structure see Erythromycin.
Properties: Long needles, mp 135-140° (dec). pKa 6.9. Soly in water: 0.024 mg/ml; sol in alcohol, acetone, chloroform. LD50 orally in rats: >5000 mg/kg (Goldenthal).
Melting point: mp 135-140° (dec)
pKa: pKa 6.9
Toxicity data: LD50 orally in rats: >5000 mg/kg (Goldenthal)
Therap-Cat: Antibacterial.
Keywords: Antibacterial (Antibiotics); Macrolides.
