Ace Your RETA CIRO Exam 2025 – Cool Your Way to Refrigeration Mastery!

The Environmental Protection Agency (EPA) does not classify anhydrous ammonia as a carcinogen. This distinction is based on the available scientific evidence regarding the potential health effects of anhydrous ammonia exposure. The EPA has focused on the toxicological effects of ammonia, which primarily relate to respiratory irritation and other acute effects rather than carcinogenic potential.

In contrast, organizations such as the American Conference of Governmental and Industrial Hygienists (ACGIH), the International Agency for Research on Cancer (IARC), and the National Toxicology Program (NTP) have evaluated anhydrous ammonia differently, and while opinions may vary, they do consider the chemical in relation to its potential hazard assessments, with some reference to carcinogenicity based on different weight-of-evidence criteria. Understanding these regulatory positions is critical for safety and compliance in industrial refrigeration environments where anhydrous ammonia is commonly used.