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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Selenastrum capricornutum, 72hr:  EC50= 2490mg/l, EC10~450mg/l) by growth

Skeletonema costatum, 72hr EC50=391mg/l, EC10=188mg/l

Key value for chemical safety assessment

EC50 for freshwater algae:
2 490 mg/L
EC50 for marine water algae:
391 mg/L
EC10 or NOEC for freshwater algae:
450 mg/L
EC10 or NOEC for marine water algae:
188 mg/L

Additional information

In a guideline (OECD 201) GLP study, the acute toxicity of to Selenastrum capricornutum was assessed for a substance that meets the description “Ethanol, 2-butoxy- ,manufacture of, by-products from” and was found to be low. The 72 hour EC50 was estimated to be 1075mg/l using the biomass integral and 2490 mg/l by growth rate calculation. The 48 hour EC50 was 1054 mg/l by biomass integral and 1686mg/l by growth rate.

In a guideline (ISO) study, the 72 -hour EC50 of a substance that matches the description "Poly(oxy-1,2,-ethanediyl), α-butyl, ω-hydroxyl", in the marine algae Skeletonema costatum was determined to be 391 mg/L (95% CL 297 - 470 mg/L).