Registration Dossier

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Additional information

The substance is a green solid powder at 20 °C and 1013 hPa.

The substance has a median particle size of D50 = 472 µm, determined using laser diffraction measurement

The evaluation of thermal properties was based on a DSC analysis (0-520 °C): as the substance decomposes in the temperature range of 246.03 – 284.44 °C (onset = 253.76 °C), melting point and a boiling point were not detected.

A relative density of 1.6201 at 20.0 °C was determined using the pycnometer method.

The substance is soluble in water (5.61-17.43 g/l) at room temperature and its partition coefficient (n-octanol/water) stated as Log Pow is < -2 ( -3.279 ± 0.130). For both determinations the shake-flask method was used, combined with a validated photometric method.

The vapour pressure of the test substance is expected to be negligible as the melting point is above 300 °C.

The surface activity is not expected for the substance and it is not a desired property of the material.

No reactions with water or emission of flammable gases have ever been noted. Furthermore, for soluble dyes a reaction with water is not a desirable property from the use point of view. Therefore, the substance is not expected as a substance that in contact with water may react emitting flammable gases

The substance is not flammable and a relative self ignition temperature of 277.6 °C was found.

Screening procedure failed to evidence any reason for concern related to explosive properties of the substance, as decomposition was observed in the temperature range of 246.03 – 284.44 °C (onset = 253.76 °C) but the related energy of the observed exothermal event is 211.11 J/g.

The substance is considered not to be potentially oxidising, on the basis of the chemical structure of the substance.