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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity of 1,5-naphthalene diisocyanate to aquatic algae (Desmodesmus subspicatus) was determined according to EU method C.3 which is in most parts equivalent to OECD 203 as is given as 72 hour-ErC50 = 8.74 mg/L, related to geometric mean measured concentrations. 72 hour-EC10, based on growth rate, is given as 0.512 mg/L (Bayer Industry Services, 2006)

Key value for chemical safety assessment

EC50 for freshwater algae:
8.74 mg/L
EC10 or NOEC for freshwater algae:
0.512 mg/L

Additional information

A 72h- NOErC stated in the study report is statistically significant, but not from a biological point of view. The reported ErC10 of 0.512 mg/L is statistically valid and biologically significant.