Registration Dossier
Registration Dossier
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EC number: 200-875-0 | CAS number: 75-50-3
Endpoint summary
Administrative data
Description of key information
Additional information
Trimethylamine lacks the functional groups which will be able to undergo hydrolysis under environmental conditions. Additionally, in accordance with REACH Annex VIII column 2 section 9.2.2.1, a study on hydrolysis does not need to be conducted since the substance TMA is readily biodegradable. Therefore, neither experimental nor estimated data on hydrolysis are available.
Concerning phototransformation in air the half-life of trimethylamine was calculated to be 5.52 hours, using SCR AOP v1.92a. A degradation rate constant of 69.8 E-12 cm³/molecules*sec and a 24 -hour-day was assumed. Atkinson (1986) calculated that 50 % degradation of trimethylamine would have been occured after 4 hours by indirect photolysis using hydroxyl radicals. Another calculation was performed by Atkinson and Carter (1984) with an average atmospheric O3 concentration of 7 E-11 molecule/cu-cm. In this case 50 % degradation would have been observed after 1.2 days by indirect photolysis.
Phototransformation of trimethylamine in water was also determined by calculation (Guesten et.al., 1981). As sensitiser OH molecules are assumed with a rate constant of 13100000000 L/molecule*sec. Via indirect photolysis a half-life of 62 days can be estimated for trimethylamine.
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