Registration Dossier
Registration Dossier
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EC number: 256-851-5 | CAS number: 50925-42-3
Endpoint summary
Administrative data
Description of key information
Additional information
APPEARANCE AND PHYSICOCHEMICAL STATE
Direct Yellow 086 (DY086) is a red brown organic powder at 20 °C and 1013 Pa. The volumetric distribution of particles size shows that the d(0.5) is ca 59 μm; ca 2 % of particles have a diameter lower than 4 μm.
The test item thermal behaviour has been assayed using the Differential Scanning Calorimetry (DSC). The imbibition water/solvent release was observed between 25 - 200 °C, followed by exothermic reaction between 323 - 429 °C (onset at 324.7 °C, enthalpy 102.6 J/g).
No melting and boiling points were determined. Based on thermal behaviour, the vapour pressure is expected to be negligible.
SOLUBILITY AND PARTITION COEFFICIENT
The partition coefficient of DY086 has been determined by means of shake flask method; the average of logPow resulted to be -2.9 20 °C and at pH of 6.80. Although the values recorded are outside of the applicability domain for the test method, the rusults 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 72 hours resulted to be 71.33 g/l at 20 °C and pH 9.14, confirming the high affinity with water phase, rather than the octanol one.
PHYSICAL HAZARDS
DY086 is not expected to not ignite and propagate combustion; no chemical groups associated with oxidising properties are present in the molecule.
The substance does not meet the criteria to be considered as flammable/explosive/oxidising.
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