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Toxicity to microorganisms

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Description of key information

No microbial inhibition test is available for propylene glycol n-propyl ether.  

Key value for chemical safety assessment

EC50 for microorganisms:
40 mg/L

Additional information

An aerobic biodegradation DOC die-away test following OECD Method 301A determinded propylene glycol n-propyl ether to be readily biodegradable as >70% of the material was degraded in the first 10 days. The highest concentration used in the study was 40 mg/L and no evident toxicity to the sludge occurred at this dose. This value of 40 mg/L is therefore used to calculate an STP PNEC inthe absence of any data on toxicity microorganisms.