https://ntp.niehs.nih.gov/go/7604

Target Organs and Levels of Evidence for TR-267

Toxicology and Carcinogenesis Studies of Propylene Oxide (CASRN 75-56-9) in F344/N Rats and B6C3F1 Mice (Inhalation Studies)

Chemical (Study Title)
CASRN		 Peer Review Date Route/Exposure Levels Study Laboratory
1,2-Propylene oxide
75-56-9		 06/29/1983 Inhalation
0,200,400 PPM/50 PER GROUP		 Battelle Northwest Laboratory

Levels of Evidence

Male Rats: Some Evidence
Type Organ/Tissue (Lesion)
Neoplastic Lesions
  • Nasal Cavity: ADENOMA 0/50 0/50 2/50
Non-Neoplastic Lesions
  • NASAL CAVITY: INFLAMMATION, SUPPURATIVE; HYPERPLASIA, EPITHELIAL; METAPLASIA, SQUAMOUS
Female Rats: Some Evidence
Type Organ/Tissue (Lesion)
Neoplastic Lesions
  • Nasal Cavity: ADENOMA 0/50 0/50 3/50
Non-Neoplastic Lesions
  • NASAL CAVITY: INFLAMMATION, SUPPURATIVE; HYPERPLASIA, EPITHELIAL; METAPLASIA, SQUAMOUS
Male Mice: Clear Evidence
Type Organ/Tissue (Lesion)
Neoplastic Lesions
  • Vascular System (Nasal Cavity): HEMANGIOMA 0/50 0/50 5/50; HEMANGIOSARCOMA 0/50 0/50 5/50
Non-Neoplastic Lesions
  • NASAL CAVITY: INFLAMMATION, SUPPURATIVE
Female Mice: Clear Evidence
Type Organ/Tissue (Lesion)
Neoplastic Lesions
  • Vascular System (Nasal Cavity): HEMANGIOMA 0/50 0/50 3/50; HEMANGIOSARCOMA 0/50 0/50 2/50
Non-Neoplastic Lesions
  • NASAL CAVITY: INFLAMMATION, SUPPURATIVE