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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

1. Summary

 No.  Item   Data
 6.1.1  Short-term toxicity to fish   96hr LC50 (Oryzias latipes) = 5.8mg/L
 6.1.3  Short-term toxicity to aquatic invertebrates   48hr EC50 (Daphnia magna) = 2.1mg/L
 6.1.4 Long-term toxicity to aquatic invertebrates 
  1. 21d EC50 (Daphnia magna) = 1.0mg/L

  2. 21d NOEC (Daphnia magna) = 0.74mg/L

 6.1.5  Toxicity to aquqtic algae and cyanobacteria (Selenastrum capricornutum)

    1.Area method:

    EC50(0-72hr) ≧ 18mg/L,

    NOEC(0-72hr) 18mg/L

    2.Rate method

    EC50(24-48hr) ≧ 18mg/L,

    NOEC(24-48hr) 1.8mg/L

2. Classification according to CLP(GHS)

Cyclohexene meets the criteria of Acute toxicity of Aquatic Chronic Category 2, and isn't rapidly degrading (BOD: 0%), though less bio-accumulative (BCF<45). Therefore, cyclohexene is classified as Aquatic Chronic Category 2.