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EC number: 422-930-1 | CAS number: 780759-89-9 JAUNE TZ 4210
Endpoint summary
Administrative data
Description of key information
Additional information
The determination of the abiotic degradation of FAT 40'549/A was performed according to the OECD guideline no. 111 : "Hydrolysis as a function of pH" (1981) and the EEC directive 92/69, C7: "Abiotic degradation: hydrolysis as a function of pH" (1992).
The result showed the vinylation reaction (t1/2(25 °C) < 24 hours) of the main product of FAT 40'549/A and the following hydrolysis reaction (t1/2(25 °C) = 81 days) of the vinylated main product formed was estimated to be fast at 25 °C and pH 9.
Furthermore, the main product of FAT 40'549/A was considered to be stable at pH 4, since the half-life time for the vinylation reaction was estimated to be more than 1 year at 25 °C.
At pH 7, a relative slow vinylation (t1/2(25 °C) = 9.8 days) of the main product of FAT 40'549/A was determined at 25 °C and pH 7, but the vinylated main product formed is considered to be stable at this pH range (t1/2(25 °C) > 1 year).
Two studies were performed to investigate the biodegradability of the substance:
The ready biodegradability of FAT 40'549/A was investigated in the "Manometric Respirometry Test" over a period of 28 days. Only a very slight biochemical oxygen demand (2 mg O2/l) was measured for the test article in the two test flasks over the 28-day exposure period. Therefore, FAT 40'549/A was found to be practically non-biodegradable (2.7 %) under the test conditions over 28 days.
The inherent biodegradability of FAT 40'549/A was investigated in the "28-Day Zahn-Wellens / EMPA Test". The mean concentration of DOC (Dissolved Organic Carbon) in the test flasks containing the test article varied from 57.0 mg/l to 61.9 mg/l over the exposure period of 28 days and was higher in comparison to the initial mean DOC concentration of 56.2 mg/l measured on day 0 after 3 hours of exposure. Practically no DOC-removal was observed during the first three hours of exposure. Consequently, FAT 40'549/A was found to be non-biodegradable over the 28-day test period.
Further data on biodegradation are not available.
Studies on bioaccumulation and adsorption/desorption are not available and not required, as the substance has shown a strongly negative log POW and thus is considered neither bioaccumulative nor adsorptive to organic matter.
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