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EC number: 201-224-3
CAS number: 79-77-6
Acutely toxic for aquatic invertebrates
Four guideline studies on the toxicity of Beta-Ionon on aquatic
invertebrates are available. The key results were obtained by a study
performed in compliance with OECD guideline 202 including analytical
dose verification. Daphnia magna was exposed to Beta-Ionon for 48
hours and an EC50 of 4.03 mg/l based on nominal concentrations was
determined (BASF AG, 2004). In a screening study following EEC Directive
93/32/EEC an EC50 > 1 mg/l was determined after 48 hours (BASF AG,
2004). Two further studies investigating the toxicty of Beta-Ionon on
D. magna in accordance to German standard DIN 38412 part L11 are
available. The test animals were either single bred or bred in
massculture. For the single-bred Daphnia an EC50 of 1.09 mg/l was
determined and a comparable EC50 of 1.05 mg/l was determined. However,
in both studies a solubiliser was used (BASF AG, 1990).
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