Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 270-299-2 | CAS number: 68424-38-4 This substance is identified by SDA Substance Name: C16-C18 alkyl carboxylic acid sodium salt and SDA Reporting Number: 19-006-04.
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
- readily biodegradable > 60% BOD/COD | OECD 301 D | Fatty acid C 12-18, potassium salt
- readily biodegradable | OECD 301 E | Fatty acids, C12-18, potassium salts
- readily biodegradable 84% | OECD 301 F | Tall oil fatty acid
- readily biodegradable | OECD 301 E | soidium oleate
Key value for chemical safety assessment
Additional information
Fatty acids, C12-18, potassium salts meets the OECD criteria for "readily biodegradable" (>60% BOD/COD ) in a closed bottle test (30 days), which corresponds to OECD test method 301 D.
In another study the ultimate biodegradability of Fatty acids, C12-18, potassium salts was tested in the Modified OECD Screening Test (OECD 301 E). Under the chosen conditions 86% of the test substance was degraded within the 28 days test period, i.e. Fatty acids, C12-18, potassium saltspmet the pass level for ready biodegradability. Since the pass level (= 70% DOC removal according to the OECD-Guideline 301) was reached , Fatty acids, C12-18, potassium salts can be regarded as readily degradable.
In the modified OECD 301 E test the biological degradation of sodium oleate was determined. A starting concentration of 150 mg/l of pure substance was incubated for 20 days. Before the analysis each sample had to be filtered. So the precipitated soap was removed, and only the reduction of the dissolved soap and carboxylates was determined. It must be noted that with an initial weight of 150 mg/l only a part of the test substance is present in true dissolved form.
Sodium oleate shows a high solubility. The degradation of oleate is with 98.9 or 94.6% very high.
The DOC and COD reduction confirm a high metabolism.
From these available test results, it can be deduced that the fatty acid sodium salts of high chain length up to C18 are readily degraded. Hence, it can be concluded that lower chain lengths of C16 -18, sodium salt is readily biodegradable as well.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
