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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Monopropylene glycol was found readily biodegradable after 28 days under aerobic conditions.
In an OECD306 test (seawater), 23.6 % biodegradation was observed after 64 days.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Under aerobic conditions, 106.8 % (O2 consumption), 81.7% (CO2 evolution) and 98.3% (DOC removal) biodegradation was found for 100 mg/l monopropylene glycol tested according to OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test) (West et al., 2007) and in another OECD 301 F study 81 -97% biodegradation was found for 84 mg/l monopropylene glycol tested under aerobic conditions (The Dow Chemical Company, 1999). In further assessment monopropylene glycol is considered ready biodegradable. In an OECD306 test (seawater), after 64 days 95.8 % biodegradation was observed (DOC removal) and 90.6% biodegradation was observed (CO2 evolution)(West et al., 2007)