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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

Description of key information

A test with the marine water algae Skeletonema costatume performed according to test guideline ISO 10253 and GLP guidelines revealed a 72h ErC50 of 142 mg/L and a NOEC of 32 mg/L.

Key value for chemical safety assessment

EC50 for marine water algae:
142 mg/L
EC10 or NOEC for marine water algae:
32 mg/L

Additional information

In the key study (reliable with restrictions), the toxicity of DHX2 to the marine water algae Skeletonema costatum was tested according to GLP and test guideline ISO 10253 over a concentration range of 32 - 10000 mg/L. The 72h ErC50 and NOEC were determined to be 142 mg/L and 32 mg/L, respectively. Information on test substance purity was lacking and solubility in marine water was not confirmed at levels > 1000 mg/L.