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EC number: 270-451-8 | CAS number: 68440-34-6
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (activated sludge, 3d) of 5.2mg Zn/L ; read-across
Key value for chemical safety assessment
Additional information
No studies are available on the short-term toxicity of Fatty acids, tallow, zinc salts to aquatic microorganisms. In accordance to Regulation (EC) No 1907/2006 Annex XI, 1.5, a read across to the structural analogue Fatty acids, C16-18, zinc salts (CAS No. 91051-01-3) and to inorganic zinc compounds was conducted. Based on similar structure, physico-chemical properties and zinc content, the ecotoxicological profile of the two substances is expected to be comparable. Further justification is given within the endpoint summary 6.1 and the analogue justification in section 13.
Fatty acids, C16 -18, zinc salts:
Two studies on microorganism toxicity are available for Fatty acids, C16 - 18, zinc salts. The first one was conducted according to the guideline DIN 38412, T34 (Luminescent Bacteria Inhibition Test) (TÜV, 1992). The test organism Photobacterium phosphoreum was exposed to the test substance for 30 minutes. The NOEC was determined to be 1560 mg/L. The second study was conducted according the guidelineDIN 38412, part 8 (Pseudomonas Zellvermehrungshemm-Test) (Berger, 1995). The test organism Pseudomonas putida was exposed to the test substance for 30 min. The NOEC was determined to be 1000 mg/L.
No toxicity of Fatty acids, C16 - 18, zinc salts to microorganisms is observed under the described test conditions, as also concluded in the EU Risk Assessment Report for the structural analogue Zinc distearate (CAS-No.: 557-05-1 and 91051-01-3; EINECS-No.: 209-151-9 and 293-049-4, Part 1 - Environment, Final report R074_0805_env, May 2008). Nevertheless the exposure duration is to short regarding current regulations. Therefore also data for inorganic Zinc compounds are taken into account.
ZINC:
Several data is available for this endpoint. The EC50 reported from the study by Dutka et al (1983), is giving the lowest reliable value of EC50 (3 h) = 5.2 mg/L.
For a comprehensive overview of the toxicity of zinc to microorganisms, see the hazard assessment of "Zinc" within the framework of Regulation (EC) No 1907/2006in the technical dossier (IUCLID section 13).
CONCLUSION:
Based on the above mentioned result of the studies conducted with Fatty acids, C16 - 18, zinc salts and inorganic Zinc compounds, the effect value of 5.2 mg/L is taken into account for Fatty acids, tallow, zinc salts.
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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