Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

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: Powder

Colour: Green

Odour: Odourless

Melting/freezing point

> 400 °C

 

Boiling point

Not applicable

Boiling point will occur at temperatures greater than 360 °C, based on determination of melting point.

Relative density

3.480 ± 0.002

 

Vapour pressure

Not applicable

It is not possible to determine a vapour pressure due to the high melting point (and hence high boiling point) of basic copper carbonate.

Surface tension

Not applicable

A determination of surface tension is not applicable, as basic copper carbonate has very low water solubility.

Water solubility

0.00159 – 0.00468 g/l (pH 6.2 - 6.8)

1.16 g/l (pH 5.6 – 5.8)

1.0 x 10-5g/l (pH 8.7 - 8.8)

Determined at 20.0 ± 0.5 °C.

An increase of the pH of the sample solution was noted as the test material degraded to soluble copper salts. This neutralised the acid, resulting in saturation due to the insolubility of the test material at ambient pH. Further solubility could be achieved by increasing the acidic pH of the sample solution.

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 basic copper carbonate.

Flash point

Not applicable

A Flash-point value was not determined, as this is not relevant to solid compounds, such as basic copper carbonate.

Flammability

Not highly flammable

The test material failed to ignite after exposure to a bunsen flame for two minutes in a preliminary screening test. As a result, basic copper carbonate has been determined to be not highly flammable.

Explosive properties

Not applicable

Based on the chemical composition and experience in use, it is considered that this test would give a negative result for basic copper carbonate.

Self-ignition temperature

Not applicable

Basic copper carbonate is an inorganic salt with copper in a high oxidation state. As such this material is not likely to undergo self heating under bulk storage conditions and is unlikely to auto-ignite. Self heating or auto-ignition has not been observed with basic copper carbonate following use for many years.

Oxidising properties

No oxidizing properties

Basic copper carbonate, showed no signs of oxidizing properties which could result in violent reactions to the test substances used.

Granulometry

Volume-rated particle size distribution by laser diffraction:

D(v,0.1) 4.43 µm; D (v,0.5) 16.2 µm; D(v,0.9) 33.7 µm.

Number-rated particle size distribution by laser diffraction:

D(n,0.1) 0.271 µm; D (n,0.5) 0.397 µm; D(n,0.9) 0.748 µm.

Joint registrants that produce or import basic copper carbonate corresponding to this specification 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

A determination of the dissociation constant was not carried out due to the chemical composition of basic copper carbonate as addition of acid to solutions of copper carbonate would result in the formation of carbon dioxide.

Viscosity

Not applicable

A determination of viscosity is not applicable to a solid, such as basic copper carbonate.

Auto flammability

Not applicable

Copper carbonate is an inorganic salt with copper in a high oxidation state. As such this material is not likely to undergo self heating under bulk storage conditions and is unlikely to auto-ignite. Self heating or auto-ignition has not been observed with copper carbonate following use for many years.