Registration Dossier
Registration Dossier
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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
The determination of the abiotic degradation of FAT 40549/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 vinylation reaction of the main product of FAT 40549/A was determined at pH 4.0, pH 7.0 and pH 9.0 in the first section of this study. Due to the vinylation reaction found of the main product of FAT 40'549/A at 50 °C, further vinylation tests at pH 4.0 were performed at 60 °C and 70 °C and further vinylation tests at pH 7.0 were performed at 25 °C.
In the second section, the hydrolysis reaction of the vinylated main product of FAT 40549/A was observed at pH 4.0, pH 7.0 and pH 9.0. Due to the instability found of the vinylated main product of FAT 40'549/A at 50 °C, further hydrolysis tests at pH 4.0 were performed at 70 °C and 80 °C and further hydrolysis tests at pH 9.0 were performed at 60 °C and 70 °C.
In conclusion, the vinylation reaction (t1/2(25 °C)<24 hours) of the main product of FAT 40549/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 40549/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 40549/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).
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