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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

In a ready biodegradability study, 1-bromopropane was treated with an inoculum for 28 days in a closed bottle test according to OECD 301 D and EU method C.4-E.
The toxicity control showed that the test substance is not toxic to the inoculum at the maximum test concentration of 5.6 mg/L.
19.2 % biodegradation was achieved after 28 days and therefore 1-bromopropane cannot be classed as readily biodegradable.
The results of a screening prediction using BIOWIN v4.1 were as follows:
• Biowin1 (Linear Model Prediction) : Biodegrades Fast
• Biowin2 (Non-Linear Model Prediction): Does Not Biodegrade Fast
• Biowin3 (Ultimate Biodegradation Timeframe): Weeks
• Biowin4 (Primary Biodegradation Timeframe): Days-Weeks
• Biowin5 (MITI Linear Model Prediction) : Biodegrades Fast
• Biowin6 (MITI Non-Linear Model Prediction): Does Not Biodegrade Fast
It can be reasonably concluded that the test material is inherently biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
inherently biodegradable

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