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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

No data are available for the toxicity to microorganisms of hexyl salicylate.  

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
100 mg/L

Additional information

No data has been generated to fulfil this data requirement. However, a biodegradation study with hexyl salicylate was conducted according to OECD guideline 301F with a nominal concentration of 100 mg/L.  Under the conditions of the test, hexyl salicylate underwent 91 % biodegradation after 28 days. Biodegradation reached 82 % at the end of the 10-day window (days 2 to 12).

Thus, hexyl salicylate should be regarded as readily biodegradable according to this test.

 

At the concentration used in the test (100 mg/L), hexyl salicylate is not inhibitory to the micro-organisms.

 

In the absence of toxicity study conducted according to OECD guideline 209 the ECHA guidance document, Chapter R7.8.16.1 states the following: “The assumption that the substance under investigation is not inhibitory to the micro-organisms when dosed in the test system is implicit in ready biodegradability testing (i.e. ... OECD 301F). If a compound degrades well in a ready biodegradability test, or does not inhibit the degradation of a positive control at a certain concentration, this concentration can be used as a NOEC value”.

 

Therefore it is considered appropriate to set the NOEC for this endpoint as 100 mg/L.