Registration Dossier
Registration Dossier
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EC number: 273-086-2 | CAS number: 68937-75-7
Endpoint summary
Administrative data
Description of key information
Additional information
Good quality read across data from the two main constituents (>10%) octanoic acid (C8, CAS 124 -07 -7) and decanoic acid (C10, CAS 334 -48 -5) of the UVCB substance fatty acids, C8 -10 (CAS 68937 -75 -7) as well as a read across to the analogue substance sodium laurate (CAS 629 -25 -4) were used to assess the short and long term toxicity of the substance to aquatic organisms.
Concerning short term toxicity data for all three trophic levels, algae was found to be the most sensitive organism with an ErC50 (72 h) of 15 mg/L (nominal), which resulted from a study conducted with the read across substance decanoic acid. Based on data from the read across substances octanoic and decanoic acid an EC50 (48 h) of > 21 mg/L (meas. geom. mean) was determined for aquatic invertebrates and an LC50 (96 h) of 18.9 mg/L (nominal) for fish.
Comparing the long-term results of the three trophic levels, aquatic invertebrates are considered to be the most sensitive aquatic organisms with a NOEC (21 d) of 0.2 mg/L (nominal), which resulted from a study performed with the read across substance decanoic acid.
Microorganisms are not expected to be sensitive to fatty acids, C8-10. This assumption is based on the EC10 (18 h) of 912 mg/L determined for the read across substance octanoic acid in a study conducted with Pseudomonas putida as the test organism.
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