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EC number: 701-308-4 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Small Vinyl Ester was tested in a fresh water algal growth inhibition test, using Pseudokirchneriella subcapitata as the test organism. The study was based on the OECD Guideline No. 201, 2006, and the procedures were designed to meet the requirements for test methods described in the European Commission Regulation (EC) No. 440/2008, Part C.3, 2008; amended by EC No. 761/2009. Due to low solubility of Small Vinyl Ester in the test medium, concentration levels that might reduce algal growth by =50% were not reached. Hence the EC50 for both the growth rate reduction and the yield inhibition were beyond the range tested, and is concluded to exceed the TWA concentration of 1.1 mg/l. With 9.8% reduction of the growth rate at the highest test concentration of 1.1 mg/L (measured), the NOEC/EC10 is arbitrary set at 1.1 mg/L (measured).
Key value for chemical safety assessment
Additional information
Due to low solubility of Small Vinyl Ester in the test medium, concentration levels that might reduce algal growth by =50% were not reached. Hence the EC50 for both the growth rate reduction and the yield inhibition were beyond the range tested, and is concluded to exceed the TWA concentration of 1.1 mg/l. With 9.8% reduction of the growth rate at the highest test concentration of 1.1 mg/L (measured), the NOEC/EC10 is arbitrary set at 1.1 mg/L (measured).
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