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EC number: 273-802-3 | CAS number: 69029-60-3 Crusts formed on the surface of cooling molten lead during the desilverizing of lead.
- 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
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Endpoint summary
Administrative data
Description of key information
Additional information
Substance: Zinc desilversing skims
“Zinc, desilverising skims are formed when solid zinc is added to molten lead bullion with a significant amount of silver and/or gold. Zinc desilverising skims consist mainly of metallic lead and silver-zinc alloys. A lighter intermetallic phase mainly consisting of zinc, silver and lead forms on the surface, from which it is skimmed. Further processing by physical means can be used to reduce the lead content, as well as the content of some impurities, without chemically altering the zinc/silver/lead phase.” |
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EC names |
EC number/ EINECS No. |
CAS No. |
Zinc desilverising skims |
273-802-3 |
69029-60-3 |
Silver crusts |
273-799-9 |
69029-57-8 |
Note: substances pre-registered under the EC numbers 273-802-3 and 273-799-9 were merged as a result of sameness discussions within the relevant SIEFs. They are collectively identified under the name Zinc desilverising skims and the EC number 273-802-3.
Zinc desilvering skims is a (metallic) grey, odourless solid (at 20°C and 101.3 kPA) in massive form. The density will vary according to the precise composition of the sample. The density of the tested sample was 9.76 g/cm3. The melting point is shown to be ca 316°C. Consequently, boiling point and vapour pressure cannot be determined. The water solubility test shows dissolution of metal ions although these results should be used with caution.
There is no evidence of physical hazards in terms of (auto)flammability, explosivity and oxidizing properties.
Studies regarding flash point, partition coefficient, surface tension and particle size distribution do not need to be conducted.
Waivers are in place for all these endpoints.
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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