Registration Dossier
Registration Dossier
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EC number: 251-649-3 | CAS number: 33704-61-9
Endpoint summary
Administrative data
Description of key information
The adsorption potential of the substance was determined in a study based on the batch equilibrium method. Under the conditions of the test, the log Koc of the substance was determined at 2.3 (equivalent Koc = 200 L/kg). Based on this value the substance has low potential for adsorption to solid surfaces and soil.
To assess the volatilisation potential of the substance a Henry's law constant was calculated in EUSES which showed a value of 3.92 Pa.m3/mol at 25°C and 1.88 Pa.m3/mol at 12°C. Distribution modelling showed that volatilisation only plays a minor role in the environmental behaviour of the substance.
Based on Level III distribution modelling using EPISUITE (assuming equal and continuous releases to air, water and soil) using the CAS number 33704-61-9 and the measured physico-chemical parameters as input, it is estimated that the majority of the substance released to the environment will partition mainly into soil (85%) and water (14%) with small amounts to sediment and air (both <1%).
The SimpleTreat model, which is incorporated in EUSES, simulated the distribution of the substance in a Sewage Treatment Plant based on vapour pressure, water solubility, log Kow and biodegradability. The model predicts that 92.3% of the substance will partition to water, 1.76% to sewage sludge (primary settler) and 5.2% to air.
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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