Triaryl Phosphate Ester Hydraulic Fluids - A Reassessment of Their Toxicity and Environmental Behaviour

Triaryl phosphates have been used as fire-resistant hydraulic fluids in hazardous applications for many years and are currently finding new markets. There have, however, been some historical concerns regarding their toxicity and ease of handling. This paper reviews the available test data (including the most recent ecotoxicity information) and confirms that commercially-available products have a generally favourable toxicity and ecotoxicity profile.