Registration Dossier
Registration Dossier
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EC number: 201-074-9 | CAS number: 77-99-6
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
Trimethylolpropane is hydrolytically stable: The hydrolytic half-life at pH 4.0, 7.0, and 9.0 and 25°C was determined to be greater than 1 year in the dark. Reference: MITI, <= 1994
For the hydrolytical photodegradation a DT50 of 306 days was determined experimentally. Reference:
Reference: MITI, <= 1994
The half life of trimethylolpropane when reacting with OH-radicals in air was calculated to be approx. 28 hours (equivalent to 1.2 days).
Reference: Lanxess, 2009
Biodegradation
Trimethylolpropane was shown to be not readily biodegradable (Reference: Müller & Caspers, 1990), but fulfilled the criterion for inherent, ultimative biodegradability (70% degradability within 7 days) and was 100% inherently biodegradable after 28 days.
Reference: Caspers & Müller, 1992
The performance of a simulation test for ultimate degradation in surface water is scientifically not justified because the substance shows no hazard to humans or the environment and is inherently, ultimate biodegradable.
A sediment and a soil simulation test for biodegradation are not justified due to the low potential to adsorb to the sediment and to the soil and the resulting negligible exposure to sediment and soil.
Bioaccumulation
The bioconcentration potential of trimethylolpropane in fish was tested experimentally. The resulting log BCF of lower than 2, BCF < 17 indicates that the potential for bioconcentration in fish is low.
Reference: MITI, <= 1994
Adsorption/desorption on soil or sediment
The distribution coefficient koc was calculated from a log kow of -0.47 to be 1.5.
Reference: Schweitzer, 2010.
Trimethylolpropane has a low adsorption potential.
Henry´s Constant
The Henrys Law Constant was calculated by using HENRYWIN v3.10. From the values obtained with three different methods, the result from the Bond method was used for any exposure assessment: 1.48 E -08 atm m3/mol. The potential of trimethylolpropane to pass from the water phase into air is very low.
Reference: Lanxess, 2009
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