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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short term effects on fish ranged from 74 to 725 mg B/L. Equivalent concentrations of sodium pentaborate would be:


Anhydrous: 281 to 2750 mg/L,


Pentahydrate: 404 to 3957 mg/L.


Short term effects on aquatic invertebrates ranged from 45 to 1376 mg B/L. Equivalent concentrations of sodium pentaborate would be:


Anhydrous: 171 to 5220 mg/L,


Pentahydrate: 246 to 7511 mg/L.


Short term effects on the algae Pseudokirchneriella subcapitata (formerly Selenastrum capricorntum) were observed at 40 mg B/L. Equivalent concentrations of sodium pentaborate would be:


Anhydrous: 152 mg/L,


Pentahydrate: 218 mg/L.


These data support a conclusion that borates should not be classified as dangerous for the environment.

Additional information