National Toxicology Program

CASRN: 643-22-1

Formula: C37-H67-N-O13.C18-H36-O2

Synonyms/Common Names:

• OCTADECANOATE ERYTHROMYCIN (SALT)

Known Uses:

ANTIBACTERIAL AGENT. (TDB)

Short-Term Toxicity

• 14-Day (Dosed-Feed)  (C55674) Completed 
  • NTIS No. PB89-178537  (Peer Review 07/14/1987)
    Citation: Toxicology and Carcinogenesis Studies of Erythromycin Stearate (CAS No. 643-22-1) in F344/N Rats and B6C3F1 Mice (Feed Studies)
  • Rats: F344/N; Mice: B6C3F1
• 13-Week (Dosed-Feed)  (C55674) Completed 
  • NTIS No. PB89-178537  (Peer Review 07/14/1987)
    Citation: Toxicology and Carcinogenesis Studies of Erythromycin Stearate (CAS No. 643-22-1) in F344/N Rats and B6C3F1 Mice (Feed Studies)
  • Rats: F344/N; Mice: B6C3F1
  • Dose: 0,1250,20000 PPM/10 PER GROUP

Long-Term Carcinogenicity

• 2-YEAR (Dosed-Feed)  (C55674) Report Complete 
  • TR-338 (NTIS No. PB89-178537)  (Peer Review 07/14/1987)
    Toxicology and Carcinogenesis Studies of Erythromycin Stearate (CAS No. 643-22-1) in F344/N Rats and B6C3F1 Mice (Feed Studies)
  • Rats: F344/N; Mice: B6C3F1
  • Carcinogenesis Results
  • Male Rats No Evidence 
  • Female Rats No Evidence 
  • Male Mice No Evidence 
  • Female Mice No Evidence 
  • Dose: R: 0,5000,10000 M: 0,2500,5000 PPM/50 PER GROUP

Genetic Toxicology

• In Vitro Cytogenetics (CA/SCE)  (756378) Completed 
  • Citation: Anderson, B.E., Zeiger, E., Shelby, M.D., Resnick, M.A., Gulati, D.K., Ivett, J.L., and Loveday, K.S. Chromosome aberration and sister chromatid exchange test results with 42 chemicals. Environ. Molec. Mutagen. Vol. 16 (Suppl 18) (1990) 55-137
  • Chromosome Aberation Negative 
  • Sister Chromatid Exchange Negative 
• Mouse Lymphoma  (146253) Completed 
  • Citation: Myhr B.C., McGregor, D., Bowers, L., Riach, C., Brown, A., Edwards, I., McBride, D., Martin, R., and Caspary, W.J. L5178Y mouse lymphoma cell mutation assay results with 41 compounds. Environ. Molec. Mutagen. Vol. 16 (Suppl 18) (1990) 138-167
  •  Inconclusive 
• Salmonella  (457939) Completed 
  • Citation: Mortelmans, K., Haworth, S., Lawlor, T., Speck, W., Tainer, B., and Zeiger, E. Salmonella mutagenicity tests. II. Results from the testing of 270 chemicals Environ. Mutagen. Vol. 8 (Suppl 7) (1986) 1-119
  •  Negative