Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The calculated half life of tripropylene glycol is 0.19 days with a OH radical concentration of 1.5E6 OH/cm3 (Aopwin, 2000).

In accordance with column 2 of REACH Annex VIII, the hydrolysis test does not need to be conducted as the substance is readily biodegradable. Furthermore, ethers and glycols are generally known to be resistant to hydrolysis (Harris, J.C., 1990). Therefore, the substance is not expected to undergo hydrolysis under environmentally relevant conditions. No photodegradation in water is expected, because of lack of UV absorption (OECD SIDS, 1994).

The rate constant used in the assessment are (EUSES calculations):

Degradation for hydrolysis

6.93E-07 d-1

Degradation for photolysis

6.93E-07 d-1

Degradation in air

0.19 d-1 (QSAR calculation)