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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: Oldersama et al (2003): 72 h ErC50 = 37 mg/L  and 72 h ErC10 = 5.7 mg/L (Scenedesmus subspicatus)

Key value for chemical safety assessment

EC50 for freshwater algae:
37 mg/L
EC10 or NOEC for freshwater algae:
5.7 mg/L

Additional information

Oldersama et al (2003) was chosen as the key study on the basis that it was a well reported method study performed in line with standardised OECD and EU guidelines and conducted to GLP standard. In addition, the purity of the test substance was 99.66%. The 72 hour ErC50 for this study was determined to be 37 mg/L, 72 hour ErC10 = 5.7 mg/L.

The Ward et al (1996) study was another reliable guideline study, and gave a 96 h ErC50 of > 9.8 mg/L. The test material contained at least 99% pure Dimethyltin dichloride. Oldersama et al (2003) was chosen over this study on the basis that it gave a definitive ErC50 value as opposed to a limit value, and was also carried out for the typical 72 h for this endpoint, as opposed to 96 h in the Ward et al (1996) study.