Registration Dossier
Registration Dossier
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EC number: 200-816-9 | CAS number: 74-86-2
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The estimated 96-hour EC50 is 57 mg/L for fresh water algae.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 57 mg/L
Additional information
Measured data are not available for the aquatic toxicity endpoints. In accordance with column 2 of REACH Annex VII and VIII, the acute toxicity tests do not need to be conducted if there are mitigating factors indicating that aquatic toxicity is unlikely to occur. Acetylene is a gas at standard temperature and pressure and is expected to partition primarily to air.
The ECOSAR model (Nabholz and Mayo-Bean 2009) has been used to calculate the likely toxicity of acetylene to aquatic organisms. The ECOSAR model is an appropriate QSAR model for Acetylene as it is based on a related chemical dataset that calculates the toxicity of neutral organic hydrocarbons whose mode of action is non-polar narcosis.
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