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Description of key information

Chronic study in rats exposed via inhalation for up to 21.5 months and a sub-chronic 26 week oral gavage study in rats . 

Key value for chemical safety assessment

Carcinogenicity: via oral route

Endpoint conclusion
Dose descriptor:
89.1 mg/kg bw/day

Carcinogenicity: via inhalation route

Endpoint conclusion
Dose descriptor:
364 mg/m³

Justification for classification or non-classification

In a sub-chronic and chronic toxicity studies in rats exposed to 1 -nitropropane there was no increased tumor incidences in male or female rats. Therefore, the carcinogenicity of 1 -nitropropane is not classifiable according to GHS.

Additional information

In a chronic toxicity study, male and female Long-Evans rats were exposed to 100 ppm (364 mg/m3) 1 -nitropropane vapor for 7 hours a day 5 days a weeks for up to 21.5 months. Upon histologic examination no hepatocarcinomas were found in the exposed group.

In a sub-chronic study, male Spraque Dawley rats were exposed to 1 mmole//kg (89.1 mg/kg) of 1 -nitropropane 3 x a week for 16 weeks then once per week for an additional 10 weeks. No treatment related tumours occurred in the rats.