Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Propyl gallate is not readily biodegradable, not bioaccumulating, and soluble in water (WS: 2.7 g/L). Due to its physicochemical properties, propyl gallate will be present, remain, or distribute to, aqueous compartments, and will be degraded or metabolized there.

Additional information

Propyl gallate was tested according to OECD 301F to be not readily biodegradable, therefore a study on hydrolysis was conducted. In an experimental study according to OECD 111 the test item was found to be hydrolytically stable at pH 4 (DT50 > 1 year at 25°C) and hydrolytically unstable at pH 7 and 9. The results for propyl gallate predict that this substance will have a half-life of 6 days at pH 7 and 3 days at pH 9.

Based on the log Kow of 1.8, the substance is expected to have low potential for adsorption to sediment and soil. In accordance with column 2 of REACH Annex VIII, the adsorption/desorption screening test has therefore not been conducted.

Since the outcome of the environmental risk assessment based on the available data indicates safe use, according to REACH Annex IX, endpoint 9.2, column 1, further biotic degradation testing is not required.

In accordance with column 2 of REACH Annex IX, a bioaccumulation study in aquatic or sediment species is not required because propyl gallate has a low octanol-water partition coefficient (log Kow < 3), and thus a low potential for bioaccumulation.