Registration Dossier
Registration Dossier
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EC number: 952-252-4 | CAS number: -
Biodegradation in soil
Administrative data
Link to relevant study record(s)
Description of key information
Half-life in soil: 16.9 d (12 °C) based on soil-simulation study (OECD 307)
Key value for chemical safety assessment
- Half-life in soil:
- 16.9 d
- at the temperature of:
- 12 °C
Additional information
The registered substance is an Alkyl phosphate and stearyl amine salts (EC = 952-252-4). It is mainly composed by primary alkylamines (CAS 90640-32-7, UVCB), Monoalkyl dihydrogenophosphate and Dialkyl hydrogenophosphate salts (CAS 39471-52-8, Multi-Constituent). This different chemical structures are constituted by variable chain lenght with C16 and C18.
If no data are available on a salt, effects may be read-across from the anion or cation, whichever has the most toxic effect (according REACH guidance document R7b v4, June 2017 p81). It was considered that environmental fate and ecotoxicity of the registered substance as driven by properties of the dissociated alkylammonium part (for more details, please see the Read-across justification document).
Amines, C16-18-alkyl simulation test in soil :
An OECD 307 aerobic soil transformation study (3 soils) was carried out with [1-14C]-Hexadecanamine (Harlan, 2010). Although this C16 amine is strongly sorbing to soil (median Kpsoil of 3875 L/kg at lowest measured concentration) half-lives between 8.1 and 9 days at 20 degree C were determined. The median Half-life of 8.9 d at 20 degree C corresponds to a median Half-life of 16.9 d at an environmental temperature of 12 degree C.
Phosphoric acid, octadecyl ester simulation test in soil:
The results of the feasibility trial demonstrate that conducting a full study according to OECD Guideline 307, “Aerobic and Anaerobic Transformation in Soil”, would not provide any further useful information. It is unlikely that a full study would meet the objectives of the OECD Guideline 307.
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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