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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Based on the geometric mean measured concentrations of the test item 3,7,11-trimethyldodecyn-3-ol, the 72 hour-EC50 for algae was 0.314 mg/L and EC10 was 1.41 mg/L.

Key value for chemical safety assessment

EC50 for freshwater algae:
0.314 mg/L
EC10 or NOEC for freshwater algae:
0.141 mg/L

Additional information

A GLP study according to OECD 201 (BASF 2016; 60E0025/05X056) was conducted with 3,7,11-trimethyldodecyn-3-ol. The test substance was found to inhibit the growth of the freshwater green alga Pseudokirchneriella subcapitata over the period of 72 hours. The EC50-value for inhibition of specific growth rate (ErC50) after 72 hours was 0.314 mg test item/L, the EC20- and EC10-values were determined to be 0.184 and 0.141 mg test item/L (geometric mean measured concentrations of the test item).