Copper dinitrate

Endpoint summary

Additional information

The physical and chemical properties are summarised in the following table:

Property	Value	Remarks
Physical state at 20 °C and 101.3 kPa	Solid.	Form: Crystalline. Colour:Blue with a Munsell colour value of 2.5PB 5/10. Odour: Odourless.
Melting/freezing point	255 °C.
Boiling point	Not applicable.	No boiling point before decomposition. Decomposed from approx. 266 °C.
Relative density	2.39 at 20.0 ± 0.5 °C.
Vapour pressure	2.6 x 10^-9at 25°C.	Estimated using a computer-based method.
Surface tension	73.2 mN/m at 20.2 ± 0.5 °C.	The material is not surface active.
Water solubility	145 g/100 mL at 25 °C.
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 Cu^2+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 copper dinitrate.
Flash point	Not applicable.	Not required as the substance is solid.
Flammability	Not highly flammable.	Failed to ignite in the preliminary screening test. Based on experience in use, copper dinitrate is not pyrophoric (EU Method A.13) and is not flammable in contact with water (EU Method A.12).
Explosive properties	Not explosive.
Self-ignition temperature	No self-ignition temperature below the melting temperature.
Oxidising properties	Oxidising solid (Category 2).	The test substance has oxidizing properties when tested according to UN-MTC Procedure O.3. Substance/cellulose mixtures (1:1 and 4:1) were found to exhibit a mean burning rate greater than that of a 1:1 mixture of calcium peroxide and cellulose and less than that of a 3:1 mixture of calcium peroxide and cellulose.
Granulometry	Particle size distribution analysis, both the volume- (standard reporting of particle size distribution data) and number-based (pertinent to the nanomaterial definition), was undertaken on a bulk sample of copper dinitrate. Analysis was undertaken on the ‘as is’ powders in the bulk dry state using laser diffraction using a Malvern Mastersizer 3000 in accordance with ISO 13320:2009. The following results were obtained: The mean of the volume-rated distributions were as follows: D(v, 0.1) 66.47 µm; D(v, 0.5) 227.33 µm; D(v, 0.9) 511.67 µm. The mean of the number- rated distributions were as follows: D(n, 0.1) 4.86 µm; D(n, 0.5) 6.56 µm; D(n, 0.9) 16.20 µm.	To account for the possibility that materials with a smaller particle size may be produced for certain specialist uses, the Exposure Scenarios developed under REACH are based on the worst-case assumption that 100% of any material becoming airborne is respirable.
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.	The dissociation constant in water was not determined as the test item, being an inorganic salt, would be ionized in solution within the environmentally relevant pH range and therefore the test is not applicable.
Viscosity	Not applicable.	Not applicable to solids.
Auto flammability	No self-ignition temperature below the melting temperature.