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: White-grey

Odour: Odourless

 Melting/freezing point

Decomposes in the range 400-500°C

No melting point at atmospheric pressure.  Test item decomposes before the melting point.

 Boiling point

Not applicable

A determination of boiling point is not applicable, as the substance is a solid which decomposes before boiling.

 Relative density

 2.844

Temp.: 20.0 °C.

 Vapour pressure

 < 1.0E-7 hPa

 

 Surface tension

 Not applicable

 Based on structure, surface activity is not expected or cannot be predicted.

 Water solubility

Solubility at pH 7 (20°C): 2.03mg/L

Solubility at pH 7 (30°C): 1.91mg/L

Solubility at pH 4.1 (20°C): 23.9mg/L

Solubility at pH 9 (20°C): 0.12mg/L

The solubility of copper thiocyanate was tested at pH 7 in pure water saturated with atmospheric carbon dioxide.

Solubility at pH 4.1 was determined in a solution of water and 0.2ml H2SO4 0.2M.

Solubility at pH 9 was determined in borate buffer (50mmol/L).

 Partition coefficient n-octanol/water (log value)

 Not applicable

A determination of partition coefficient is not applicable, as the substance does not dissolve in water or in octanol.

 Flash point

 Not applicable

Flash point was not determined, as it is only relevant to liquids and low melting point solids.

 Flammability

 Not highly flammable

 

 Explosive properties

 Not applicable

An assessment of explosive properties does not need to be conducted because there are no chemical groups present in the molecule which are associated with explosive properties.

 Self-ignition temperature

 364.13°C

 

 Oxidising properties

 Not applicable

An assessment of oxidising properties does not need to be conducted because there are no chemical groups present in the molecule which are associated with oxidising properties.

 Granulometry

Volume-rated particle size distribution by laser diffraction:

D(v,0.1) 2.38 µm; D(v,0.5) 8.65 µm; D(v,0.9) 16.43 µm

Number-rated particle size distribution by laser diffraction:

D(n,0.1) 0.453 µm; D(n,0.5) 0.668 µm; D(n,0.9) 1.300 µm

Joint registrants that produce or import copper thiocyanate corresponding to this specification are able to refer to the Lead Registrants 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).

 Stability in organic solvents and identity of relevant degradation products

 Solubility in 1,2-dichloroethane:

< 10 g/L at 20°C

Solubility in ethyl acetate: < 10 g/L at 20°C

Solubility in n-heptane:

< 10 g/L at 20°C

Solubility in acetone:

< 10 g/L at 20°C

Solubility in methanol:

< 10 g/L at 20°C

Solubility in p-xylene:

< 10 g/L at 20°C