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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

key study: K_Scheerbaum_2006: EC50 (72 h)=4.15 mg/L (growth rate); NOEC (72 h) = 2 mg/L (growth rate)

Key value for chemical safety assessment

EC50 for freshwater algae:
4.15 mg/L
EC10 or NOEC for freshwater algae:
2 mg/L

Additional information

The toxicity test to aquatic algae and cyanobacteria (Scheerbaum_2006) performed according to OECD 201 and GLP was rated with RL=1 (reliable without restrictions) and used as a key study. The results indicate that SymWhite 377 inhibits the growth of the freshwater green alga Desmodesmus subspicatus at geometrical mean measured test item concentrations >= 2.00 mg/L (biomass growth) and >= 4.38 mg/L (growth rate). The EC50-values with 95 % confidence intervals for inhibition of biomass growth (EbC50) and specific growth rate (ErC50) after 72 h were 2.42 (2.35 – 2.50) and 4.15 (4.00 – 4.30) mg/L, respectively. All effect levels are given based on geometrical mean measured concentrations of the test item SymWhite 377.