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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

activated sludge respiration inhibition testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is highly insoluble in water, hence indicating that aquatic toxicity is unlikely to occur

Description of key information

According to Column 2 of REACH Annex VIII (standard information requirements for substances manufactured or imported in quantities of 10 tonnes per year or more) of Regulation (EC) No 1907/2006 and ECHA Guidance on information requirements and chemical safety assessment, STP toxicity testing (activated sludge respiratory inhibition testing) does not need to be conducted if there is no emission to a sewage treatment plant or there are mitigating factors, indicating that microbial toxicity is unlikely to occur, for instance the substance is highly insoluble in water (limitation of exposure). Hexagonal boron nitride is an inorganic crystalline solid covalent nitride with a high chemical inertness (1). It is inert to concentrated and dilute hydrochloric and nitric acid, aqua regia, and alkali solutions at the boiling temperature and it is practically insoluble in water (see section 4.8 of the IUCLID dossier).

Key value for chemical safety assessment

Additional information