Registration Dossier
Registration Dossier
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EC number: 266-936-9 | CAS number: 67701-12-6 This substance is identified by SDA Substance Name: C14-C18 and C16-C18 unsaturated alkyl carboxylic acid zinc salt and SDA Reporting Number: 04-006-09.
Endpoint summary
Administrative data
Description of key information
Fatty acids, C14-18 and C16-18-unsatd., zinc salts is readily biodegradable based on data from analogous substances. Based on the solubility in water, its environmental fate is controlled by the mobility of zinc cations and C14-18 saturated and C16-18-unsatd. fatty acid anions under environmental conditions, and by fatty acids degrading via the β-oxidation pathway. Using QSAR (KOCWIN v2.00, EPI Suite v4.1), the log Koc values of tetradecanoic acid (C14 saturated), hexadecanoic acid (C16 saturated), octadecanoic acid (C18 saturated), cis-9-hexadecenoic acid (C16 unsat.), 9-octadecenoic acid (C18 unsat.), 9,12-octadecadienoic acid (C18 unsat.) and 9,12,15-octadecatrienoic acid (C18 unsat.) were estimated based on the respective logKoc with 3.54, 4.12, 4.71, 3.80, 4.38, 4.06 and 3.73 (corresponding to Koc values of 3,430, 13,230, 51,050, 6,242, 24,080, 11,360 and 5,357 L/kg), respectively. Transport and distribution coefficients are reported for zinc cations, which will be released upon dissolution in water. However, 70 % of zinc is removed from the water column under reference conditions for EU regional waters (EUSES) (see section 5.6.: “removal from the water column”). Please refer to the endpoint summary of the respective assessment entity for further details.
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