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Diss Factsheets
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EC number: 293-049-4 | CAS number: 91051-01-3
- 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
Fatty acids, C16-18, zinc salts:
Based on two studies applied in a weight-of-evidence approach, observed toxicity of fatty acids, C16-18, zinc salts to bacteria is above the water solubility limit of around 1 mg/L. A similar conclusion was made in the EU RAR Zinc distearate (CAS-No.: 557-05-1 & 91051-01-3 EINECS-No.: 209-151-9 & 293-049-4) Part 1 - Environment (Final report R074_0805_env, May 2008) as follows: "The two available tests with bacteria resulted in NOEC values of 1000 mg zinc distearate/L (Berger, 1995b: Pseudomonas putida) and 1560 mg zinc distearate/L (TÜV, 1992: Microtoxtest according to DIN 38412, part 34). In the latter study an EC20 of 6250 mg zinc distearate /L was calculated, with the remark that an EC50 could not be derived because of the low effect response. These nominal concentrations are at least 3 orders of magnitude higher than the water solubility limit for zinc distearate (around 1 mg/L)."
Fatty acids, C16 -18, zinc salts are readily biodegradable (93% in 28 days, TÜV, 1992; 71% in 28d, Rudolf, 1992) and are not expected to persist in the environment. Thus, Fatty acids, C16-18, zinc salts are expected to have a low potential for toxicity to aquatic microorganisms.
However, for the environmental hazard assessment and making use of the extensive dataset available on zinc toxicity, read-across to the assessment entities soluble zinc substances and C16-18 fatty acids is applied since zinc cations and fatty acid anions (C16-18) determine fate and toxicity in the environment. Since C16 -18 fatty acids have a low potential for sediment toxicity, the sediment hazard assessment of fatty acids, C16-18, zinc saltis based on zinc ions. Please refer to the endpoint summary of the respective assessment entityfor further details.
Fatty acid anions (C16-18):
Fatty acids as contained in plant and animal tissue are a natural component of aquatic systems, are rapidly degraded and non-bioaccumulative and have a low potential for toxicity to aquatic microorganisms.
Zinc:
A NOEC of 0.1 mg Zn/L is reported for nitrification inhibition.
Key value for chemical safety assessment
Additional information
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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