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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

(72-h) EC50: >1170 mg/L growth rate Desmodesmus subspicatus, reliability 1. 
NOEC: 221 mg/L growth rate Desmodesmus subspicatus, reliability 1.

Key value for chemical safety assessment

Additional information

A 72-hour EC50 value of >1170 mg/L and NOEC of 221 mg/L have been determined for the effects of the test substance on growth rate of Desmodesmus subspicatus (tested as Scenedesmus subspicatus). The result is expressed in terms of the estimated concentration of the parent substance based on measured DOC concentration of the stock solution. However it is likely that the test organisms were primarily exposed to the hydrolysis products of the substance.

The study is supported by QSAR predictions for the hydrolysis product 2-methylpropylsilanetriol is (ErC50 value of 410 mg/L).