Registration Dossier
Registration Dossier
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EC number: 248-742-6 | CAS number: 27939-60-2
Endpoint summary
Administrative data
Description of key information
A measured Koc value of 160 (log Koc 2.2) indicates that the substance has low potential to adsorb to sediment/soil.
The Henry's law constant is calculated using the equation from EUSES. Using a molecular weight of 138.21 g/mol, and the experimentally determined vapour pressure of 66.1 Pa (at 24 °C) and water solubility of 381.8 mg/L (at 24°C) the Henry's law constant is calculated to be 12.1 Pa·m³/mol at environmental temperature (12 °C) or 25.3 at 25°C. According to ECHA guidance R7a on Henry C: “Table R.7.1–17 Conditions that have influence on HLC values: Important for aldehydes, which hydrate nearly completely in water, resulting in HLC apparent being several orders of magnitude lower than the intrinsic constant”. This means that the substance limitedly will volatilise from water.
Based on Level III environmental distribution modelling using EPISUITE (using the Smiles code O=CC1CC=C(C)CC1C (and not the CAS no. because the Cas no. in EpiSuite shows an alpha-beta conjugated aldehyde while the double bond is actually not conjugated), assuming equal and continuous releases to air, water and soil using the test substance and its measured physico-chemical parameters (water solubility and log Kow) as input, it is estimated that the majority of the substance released to the environment will partition mainly into soil (66%) and water (33.8%) with small amounts to air (0.084%) and sediment (0.103%).
The SimpleTreat model, which is incorporated in EUSES, simulates the distribution of the substance in a Sewage Treatment Plant. Model calculations show that 0% of the substance will be degraded and that 81.7%, 1.89% and 16.4% will partition to water, sewage sludge and air, respectively.
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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