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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The toxicity of Cyclohexane, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethyl-, homopolymer, caprolactam-blocked to the unicellular freshwater green alga Pseudokirchneriella subcapitata was determined according to the principles of OECD Guideline No. 201 for Testing of Chemicals (2006). The aim of the study was to assess the effects on growth rate and yield production over a period of 72 hours. Six replicates were tested each for the limit concentration and the control. A slight inhibition on growth of the freshwater green alga Pseudokirchneriella subcapitata was found after 72 hours of exposure to the test substance. The NOEC for inhibition of the specific growth rate after 72 hours was 0.0579 mg/L. A slight yield inhibition (< 20 %) was found at the limit concentration. 

Key value for chemical safety assessment

Additional information