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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

PBT status:
PBT assessment does not apply
Justification:

Annex XIII to the REACH Regulation (Commission Regulation 1907/2006, as amended by Regulation 253/2011, 15 March 2011) states that the assessment of Persistence, Bioaccumulation and Toxicity will apply to all organic substances, including organometals. Silicon Nitride is an inorganic substance, and therefore does not meet this criteria; on this basis it is concluded that a PBT assessment is not necessary. It is concluded that Silicon Nitride

is not a PBT substance.

In addition to the above reasoning, it should be noted that Silicon Nitride is insoluble in water (<1 mg/L at 20°C), and so would not be expected to enter the aquatic phase, and therfore would not be expected to bio-concentrate across different trophic levels. Furthermore, none of the aquatic ecotoxicity testing nor the toxicity testing (for human health endpoints) conducted on Silicon Nitride has indicated any toxic effects, and Silicon Nitride does not meet the any criteria for classification as hazardous. It may therefore be concluded that Silicon Nitride would not meet the criteria as Toxic ("T-") as defined in Annex XIII of the REACH Regulation.