Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

No Aquatic toxicity data are available for Trimethyl borate since the compound rapidly hydrolyzes in water with a half-life of less than 1 second to form methanol and boric acid. Methanol is much less toxic to aquatic organisms compared to boric acid. Thus, PNEC values derived for boric acid are protective of the environment for the stoichiometric contribution of methanol.Therefore, toxicity data compiled on boric acid was used. The endpoints included in the dossier under environmental hazard assessment were reported from studies on the ecotoxicity of boron and various compounds, such as boric acid (H3BO3), anhydrous sodium tetraborate (Na2B4O7), and hydrated sodium tetraborates (Na2B4O7. xH2O). All endpoints were converted to concentrations of elemental boron (B) using the relative molar mass and then converted to Trimethyl borate for this IUCLID. Aquatic taxa included fish (fresh water and marine), amphibians, crustacea, insects, annelids, algae, protozoa, bacteria, cyanobacteria and higher plants (duckweed).