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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

WoE based on two pieces of information:
1. The tested analog substance 2-Propyn-1-ol, compd. with methyloxirane (38172-91-7), which structurally differs from the registered substance 2-Propyn-1-ol, compd. with oxirane by a methy side group in the oxirane chain, is almost not toxic to algae.
2. Based on an well established QSAR programm the most toxic component (mono-ethoxylate) of the registered substance 2-Propyn-1-ol, compd. with oxirane is not toxic to algae.
Conclusion: taken together there is strong evidence that the registered substance is almost not toxic for algae.

Key value for chemical safety assessment

EC50 for freshwater algae:
101 mg/L
EC50 for marine water algae:
10.1 mg/L
EC10 or NOEC for freshwater algae:
0.1 mg/L
EC10 or NOEC for marine water algae:
0.01 mg/L

Additional information