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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

In a reliable study performed on freshwater algae, the substance was found not harmful to algae with a 72-hour EC50 = 598 mg a.i./L and 72-hour EC10 = 262 mg a.i./L.

Key value for chemical safety assessment

EC50 for freshwater algae:
598 mg/L
EC10 or NOEC for freshwater algae:
262 mg/L

Additional information

The substance was tested for toxicity on Pseudokirchneriella subcapitata in a study performed according to OECD Guideline 201 and in accordance with GLP.

The freshwater alga, Pseudokirchneriella subcapitata, was exposed to a geometric series of six treatment levels of2-isobutyl-2-methyl-1,3-dioxolane-4-methanol ranging from 31 to 944 mg a.i./L, based on mean, measured concentrations of this substance.

Toxicity of 2-isobutyl-2-methyl-1,3-dioxolane-4-methanol to P. subcapitata was assessed based on effects on growth rate and yield relative to the negative control group. The 72-hour EC50values for growth rate and yield were determined to be 598 mg a.i./L and 219 mg a.i./L, respectively. The 72 hour EC10 value for growth rate was determined to be 262 mg a.i./L.

Based on the results of this study, the test item is considered as not harmful to aquatic plants in accordance with the Regulation (EC) 1272/2008 (CLP).