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Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

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

Property

Value

Remarks

Physical state at 20 °C and 101.3 kPa

Solid.

Form: Powder.

Colour:Brown with a Munsell colour value of 7.5YR 4/6 at 22.0 ± 0.5 °C.

Odour: Odourless.

Melting/freezing point

598 °C.

 

Boiling point

993 °C.

 

Relative density

3.4 g/cm3.

Temperature: Near room temperature.

Vapour pressure

5.9 x 10-8Pa at 25 °C.

Estimated using a computer-based method.

Surface tension

72.7 mN/m at 21.0 ± 0.5 °C (concentration: 1.01 to 1.06 g/L).

The material is not surface active.

Water solubility

75.7 g/100 g at 25.0 °C.

pH not stated.

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 copper dichloride.

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 dichloride is not pyrophoric (EU Method A.13) and is not flammable in contact with water (EU Method A.12).

Explosive properties

Not explosive.

Copper dichloride was assessed for the presence of chemical groups that imply explosive properties. Since none of these are present in the chemical structure of the test substance, copper dichloride is considered not to be explosive.

Self-ignition temperature

Not applicable.

Copper dichloride has been determined not to have a relative self-ignition temperature below 400 °C.

Oxidising properties

No oxidising properties.

Copper dichloride was assessed for the presence of chemical groups that imply oxidising properties. Since none of these are present in the chemical structure of the test substance, copper dichloride is considered not to possess any oxidising properties.

Granulometry

Copper (II) chloride anhydrous:

Volume-rated particle size distribution by laser diffraction: D(v,0.1) 9.71 µm; D (v,0.5) 23.63 µm; D(v,0.9) 271.67 µm.

Number-rated particle size distribution by laser diffraction: D(n,0.1) 1.46 µm; D (n,0.5) 2.05 µm; D(n,0.9) 9.90 µm.

Copper (II) chloride (hydrated):

Volume-rated particle size distribution by laser diffraction: D(v,0.1) 52.60 µm; D (v,0.5) 153.33 µm; D(v,0.9) 446.33 µm.

Number-rated particle size distribution by laser diffraction: D(n,0.1) 2.89 µm; D (n,0.5) 3.69 µm; D(n,0.9) 8.16 µm.

Joint registrants that produce or import copper dichloride (anhydrous or hydrated) corresponding to these specifications are able to refer to the Lead Registrant's granulometry data for the purpose of REACH registration.

The material does not fall under the category of nanomaterial (50% < 0.1 µm based on particle number).

The Exposure Scenarios developed under REACH are based on the worst-case assumption that 100% of any material becoming airbourne 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 copper dichloride, 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

Not applicable.

Copper dichloride has been determined not to have a relative self-ignition temperature below 400 °C.

 

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