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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The EC50 for the toxicity of Petroleum gases category members to aquatic algae and cyanobacteria ranged from7.71 - 16.5 mg/l

Key value for chemical safety assessment

Additional information

No experimental data were available on the toxic effects of category members on aquatic algae and cyanobacteria. Due to the difficulty associated with aquatic toxicity testing with gases, QSAR calculations are considered suitable to estimate the effect concentration. ECOSAR Program v1.00 in EPI Suite v4.00 was used, which is acceptable with restrictions. QSAR calculations were conducted for substances which were representative of the carbon numbers of the members of the category (methane, ethane, propane, butane, isobutane and propane) The EC50 for toxicity to aquatic algae is estimated to range from 7.71 to 16.5 mg. l-1in fresh water.

However, due to the volatility of the petroleum gases, the calculated effect concentrations are not relevant in practice, but are used as an indication of potential toxicity