Skip to Main Navigation
Skip to Page Content

COVID-19 is an emerging, rapidly evolving situation.

Get the latest public health information from CDC and research information from NIH.

U.S. flag

An official website of the United States government

Dot gov

The .gov means it's official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you're on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Share This:
https://ntp.niehs.nih.gov/go/13752

Erythromycin stearate: Target Organs and Levels of Evidence for TR-338

Toxicology and Carcinogenesis Studies of Erythromycin Stearate (CASRN 643-22-1) in F344/N Rats and B6C3F1 Mice (Feed Studies)

Chemical (Study Title)
CASRN
Peer Review DateRoute/Exposure LevelsStudy Laboratory
Erythromycin stearate
643-22-1
07/14/1987Dosed-Feed
R: 0,5000,10000 M: 0,2500,5000 PPM/50 PER GROUP
Physiological Research Laboratory

Levels of Evidence

Male Rats: No Evidence
TypeOrgan/Tissue (Lesion)
Non-Neoplastic Lesions
  • LIVER: GRANULOMA 1/50 2/50 10/50
Female Rats: No Evidence
TypeOrgan/Tissue (Lesion)
Non-Neoplastic Lesions
  • LIVER: GRANULOMA 18/50 27/50 43/50
Male Mice: No Evidence
Female Mice: No Evidence