Registration Dossier
Registration Dossier
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EC number: 277-288-1 | CAS number: 73138-39-3
Endpoint summary
Administrative data
Description of key information
Additional information
Experimental studies assessing the toxicity of the UVCB substance fatty acids, coco, esters with 1,3-butanediol (CAS 73138-39-3) are available for three trophic levels, i.e. algae, fish, and aquatic invertebrates. The studies were performed according to appropriate guidelines and GLP.
The experimental studies resulted in short-term effect values of EL50 (48 h) = 37.59 mg/L (nominal loading rate) for aquatic invertebrates, and an ErL50 (72 h) = 16.95 mg/L (nominal loading rate) for algae. For fish a LC50 (96 h) > 10.26 mg/L (initial measured conc.) was determined (LC50 (96 h) > 100 mg/L nominal). Thus, algae was identified as the most sensitive trophic level. Long term toxicity data are available only for algae with an ErL10 (72 h) = 6.85 mg/L (nominal loading rate) and a NOErLR of 3.07 mg/L (nominal loading rate).
The toxicity control performed within the scope of the biodegradation screening test (OECD 301) revealed no toxic effects on aquatic microorganisms.
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