Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The calculated half life of monopropylene glycol is 0.83 days with a OH radical concentration of 1.5E06 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. Monopropylene glycol is expected to degrade rapidly in water from biological processes but is not expected to be significantly influenced by hydrolysis, oxidation, volatilization, bioconcentration, or absorption to sediment (OECD SIDS, 2001).


The calculated half life of monopropylene glycol in water is 2.3 years with an OH radical concentration of 10-17 mol/litre (Anbar, 1967). The indirect photolysis of monopropylene glycol by photochemically-produced hydroxy radicals is slow in water.