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EC number: 205-087-0
CAS number: 133-06-2
Captan is acute toxic in aquatic systems with the most sensitive species fish (Salmo trutta LC50 (96 h) = 0,093 mg/L; Oncorhynchus mykiss NOEC(21d) = 0.056 mg/L)) leading to classification as acute toxic in aquatic systems category 1 (H400) according to Annex 1, Chapter 4 of regulation 1272/2008.
For algae based on biomass lower toxicity was observed (Pseudokirchnerella subcapitata EC50 (96 h): 1.6 mg/L; NOEC (96 h): 0.2 mg/L). Even for invertebrates low toxicity was found (Daphnia magna EC50 (48 h) > 7.1 mg/L; NOEC (21 d) = 0.56 mg/L). The effects on aquatic microorganisms are comparable to algae and invertebrate results (STP EC50 (3 h) = 8.2 mg/L); NOEC (3 h) = 0.64 mg/L).
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