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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The NOEC for named parameters is 32 mg/L, the LOEC is 100 mg test item/L. 

Key value for chemical safety assessment

EC50 for freshwater algae:
100 mg/L
EC10 or NOEC for freshwater algae:
32 mg/L

Additional information

There has been done no testing of beta-Cyclodextrin, acetate in a study according to OECD 201.

Therefore two read-across substances have been evaluated instead:

beta-Cyclodextrin (CAS RN 7585 -39 -9) and hydroxypropyl-beta-Cyclodextrin (CAS RN 128446 -35 -5).

beta-Cyclodextrin is the primary degradation product of beta-Cyclodextrin, acetate (readily biodegradeable, OECD 301D).

Hydroxypropyl-beta-Cyclodextrin has a similar structure but is not readily biodegradeable and is therefore considered as

a worst-case read-across approach for acute toxicity to aquatic algae.