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Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

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Description of key information

The estimated 14 day LC50 is 67 ppm for earthworms.

Key value for chemical safety assessment

Short-term EC50 or LC50 for soil macroorganisms:
67 mg/kg soil dw

Additional information

Measured data are not available for the terrestrial toxicity endpoints. In accordance with column 2 of REACH Annex IX, 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 terrestrial 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.