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:
Reliable terrestrial toxicity data are not available for Fatty acids, C14-18 and C16-18-unsatd., zinc salts. Thus, read across to the assessment entities soluble zinc substances and C14-18 fatty acids is applied, since zinc cations and fatty acid anions determine the fate and toxicity in the environment. Since C14-18-satd. and C16-18-unsatd. fatty acids have a low potential for terrestrial toxicity, the soil hazard assessment of Fatty acids, C14-18 and C16-18-unsatd., zinc salt is based on zinc ions. Please refer to the endpoint summary of the respective assessment entity for further details.
The potential of Fatty acids, C14-18 and C16-18-unsatd., zinc salts for secondary poisoning is very low for taking into account: i) the absence of indications for terrestrial and aquatic bioaccumulation at all trophic levels and biomagnification along the food chain for zinc ions (an essential element that underlies homeostatic regulation in all organisms) and fatty acid anions (an integral part of normal daily diet of birds and mammals), and ii) the respective low potential for mammalian toxicity.
Fatty acid anions (C14-18-satd. and C16-18-unsatd.):
Fatty acids as contained in plant and animal tissue are a natural component of soil, represent a significant part of the nutritional demands of living organisms, are rapidly degraded and non-bioaccumulative and have a of low toxic potential in soil and a low potential for secondary poisoning.
Zinc:
Regarding the toxicity of zinc ions to terrestrial organisms, high-quality NOEC/EC10 values are available covering soil macroorganisms, arthropods, plants, and microorganisms and ranging from 14.6 mg Zn/kg dw for arthropods (Folsomia candida) to 5855 mg Zn/kg dw for plants (Triticum aestivum). Zinc as essential element is regulated throughout the food chain, does not bioaccumulate and biomagnify and has a low potential for secondary poisoning.
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