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EC number: 244-842-9 | CAS number: 22205-45-4
- 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
Endpoint summary
Administrative data
Description of key information
Additional information
The physical and chemical properties of dicopper sulphide are summarised in the following table.
Property |
Value |
Remarks |
Physical state at 20°C and 101.3 kPa |
Solid. |
Form: Powder. Colour: Bluish black. Odour: Odourless. |
Melting/freezing point |
1114°C. |
|
Boiling point |
Not applicable. |
Not required for substances with a melting point greater than 300°C. |
Relative density |
5.429 g/cm3at 20°C. |
|
Vapour pressure |
Not applicable. |
The substance is inorganic in nature and as such has negligible vapour pressure at environmentally relevant temperatures. |
Surface tension |
72.2 mN/m at 20°C |
Concentration tested 0.018 g/l.
|
Water solubility |
<0.01 g/L at 20°C. |
pH not stated. Dicopper sulphide is known to be very insoluble in water, and measurement of actual solubility is problematic. Theoretical estimates range from 3.43E-10µg/L to 1.36E-08µg/L. Analytical limits of determination for copper in water samples typically range between 0.1 and 10 µg/l, depending on the purity of the water and instrument sensitivity. Given the orders of magnitude difference between the expected solubility and the analytical constraints of methods used in standardised solubility testing, it is not technically feasible to provide more definitive experimental data to support the water solubility of copper sulphide. |
Partition coefficient n-octanol/water (log value) |
Not applicable. |
The octanol:water partition coefficient, Pow, is defined as the ratio of the equilibrium concentrations of a dissolved substance in each of the phases in a two phase system consisting of octanol and water. It is usually expressed on a log scale. It is a key parameter in studies of the environmental fate of organic substances, indicating the potential for bioaccumulation and soil absorption. However, the mechanisms of absorption of Cu2+into organic matter and living cells are understood to be different from those traditionally attributed to carbon-based substances and the parameter therefore has little relevance to ionic copper. The parameter is therefore not considered to be relevant to dicopper sulphide. |
Flash point |
Not applicable. |
Not required as the substance is solid. |
Flammability |
Not flammable. |
A preliminary screening test failed to ignite the sample. Copper (I) sulphide is therefore not considered to be flammable. Based on experience in use, dicopper sulphide is not pyrophoric (EU Method A.13) and is not flammable in contact with water (EU Method A.12). |
Explosive properties |
Not explosive. |
Copper (I) sulphide was assessed for chemical groups that imply explosive properties. Since none of these are present in the chemical structure of the test substance, copper (I) sulphide is considered not to be explosive. Additionally, DSC data obtained show only a low energy potential with regard to decomposition (maximum decomposition energy of −120.1 J/g). In the case of an explosive substance the exothermic decomposition energy is much higher. |
Self-ignition temperature |
240.4 °C |
|
Oxidising properties |
No oxidising properties. |
According to the UN ‘Manual of test & Criteria’, the classification procedure for inorganic substances does not need to be applied if the substance does not contain any oxygen or halogen atoms. Copper (I) sulfide is therefore not considered to possess any oxidising properties. |
Granulometry |
Five different copper compounds were subjected to total particle size analysis, resulting in d50 values in the range 3.3 - 220.4 µm. The results of this exercise are illustrative of the range of Particle Size Distributions found across whole copper compound industry and are therefore inclusive of copper sulphide from the large majority of sources. |
|
Stability in organic solvents and identity of relevant degradation products |
Not applicable. |
As stated in the REACH regulations, the study does not need to be conducted if the substance is inorganic. |
Dissociation constant |
Not applicable. |
Due to the low water solubility of copper (I) sulfide (<1x10-2g/l), it was not possible to determine the dissociation constants in water. |
Viscosity |
Not applicable. |
Not applicable to solids. |
Auto flammability |
Following a preliminary screening test, it was concluded that copper (I) sulphide is not likely to auto-ignite. |
|
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