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EC number: 285-550-1
CAS number: 85116-97-8
The test substance Fatty acids, C16-18, esters with diethylene
glycol (CAS 85116-97-8) is characterised by a low vapour pressure
(<0.00001 Pa at 20 °C, SPARC (v4.6)), a low water solubility (< 1 µg/L
at 20 °C, pH=6.3) and a log Koc indicating a potential for adsorption to
soil and sediment particles (log Koc ≥ 3.27, MCI method, KOCWIN v2.01).
Based on the result from a biodegradation study according to OECD 301B
the substance is readily biodegradable (95% after 28 d).
Based on this result, Fatty acids, C16-18, esters with diethylene
glycol will be significantly degraded in sewage treatment plants. In the
case insoluble chemicals enter a standard Sewage Treatment Plant (STP),
it will be extensively removed in the primary settling tank and fat trap
and thus, only limited amounts will get in contact with activated sludge
organisms. As a result of the potential for adsorption of the substance
(log Koc ≥ 3.27, MCI method, KOCWIN v2.01) a removal from the water
column to a significant degree by adsorption to sewage sludge can be
expected (Guidance on information requirements and chemical safety
assessment, Chapter R.7b, ECHA, 2016). In conclusion, the concentration
of the substance in conventional STP effluents is presumably marginal.
Due to ready biodegradability and based on the chemical structure,
abiotic degradation via hydrolysis is considered as not relevant for the
substance. Moreover, the substance is not volatile (vapour pressure <
0.00001 Pa at 20 °C) and thus evaporation to the air and subsequent
transport through the atmosphere to other environmental compartments is
Based on the physico/chemical properties such as low water
solubility and potential for adsorption a reduced availability in water
is expected. Moreover, the substance is expected to be metabolised in
aquatic organisms by breaking the ester bond and metabolisation of the
enzymatic hydrolysis products (fatty acid and fatty alcohol). Diethylene
glycol is expected to have a low potential for bioaccumulation based on
the log Kow of -1.47. It can be concluded that the bioaccumulation
potential of Fatty acids, C16-18, esters with diethylene glycol is
negligible. In addition BCF/BAF values estimated by QSAR (BCFBAF v3.01)
also support this assumption (BCF values all well below 2000 L/kg).
Please refer to IUCLID Section 5.3 for a detailed overview on
bioaccumulation of the substance.
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.
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