Registration Dossier
Registration Dossier
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EC number: 944-517-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Additional information
APPEARANCE AND PHYSICOCHEMICAL STATE
Direct Black 062 (DBk062) is a dark green organic powder at 20 °C and 1013 Pa. The volumetric distribution of particles size shows that the d(0.5) is ca 20.405 μm; ca 5 % of particles have a diameter lower than 4 μm.
The test item melting/boiling points were investigated using the Differential Scanning Calorimetry (DSC), according to OECD Test Guidelines 102 and 103. The imbibition water/solvent release was observed between 25-150 °C, followed by exothermic reaction between 178 -393 °C (onset at 276 °C; enthalpy of 351.1 J/g). No melting and boiling point was determined.
Based on thermal behaviour, the vapour pressure is expected to be negligible.
SOLUBILITY AND PARTITION COEFFICIENT
The partition coefficient of DBk062 has been determined by means of shake flask method; the average of logPow resulted to be -2.5250, at 20 °C and pH 7.68. Although the values recorded are outside of the applicability domain for the test method, the results can be considered as reliable and representative for the tested substance. The study outcomes are indicative of a high affinity with the water phase, respect than the octanol one.
The water solubility was performed following the recommendations of the OECD method 105 and the average between 24, 48 and 96 hours resulted to be 16.15 g/l at 20 °C and pH 9.27, confirming the high affinity with water phase, rather than the octanol one.
PHYSICAL HAZARDS
The substance does not meet the criteria to be considered as flammable, self-igniting, explosive or oxidising.
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