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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Study was conducted according to OECD guideline 201, data are reliable without restrictions. 

Key value for chemical safety assessment

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

Additional information

The toxicity of Silastol H 200 TS on the growth of the fresh water green alga Desmodesmus subspicatus was tested in a study

according to OECD guideline 201.

No significant effects were observed up to and including the highest test concentration (WAF of 100 mg/L Silastol H 200 TS).

Growth rate:

EC50: > 100 mg/L (nominal)

NOEC:100 mg/L (nominal)


EC50: > 100 mg/L (nominal)

NOEC:100 mg/L (nominal)