Hydrogen [4-[4-(diethylamino)-5'-hydroxy-2',4'-disulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene]diethylammonium, monosodium salt

Endpoint summary

Additional information

The substance is an organic compound and at 20 °C and 1013 hPa it is a blue powder. Using the laser light scattering method, the mass median diameter value for its particles was found to be 76.564 µm. The evaluation of thermal properties was based on a DSC analysis: a melting point and a boiling point were not detected; the substance decomposes between 283 °C and 309 °C. The relative density value found using a pycnometer method was 1.313 at 20 °C. The estimated vapour pressure is 5.29 E-035 mmHg at T= 25 °C. The test substance is soluble in water at room temperature and it forms a stable solution with water. The average water solubility value was 66.68 g/L at 20 °C and at pH 5.67. The log Pow value is -2.31. These results were obtained at 24 °C and at pH 5.2. Surface activity is not expected property for this substance and, since it is a solid, the flash point can be neglected. 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 also an air-stable compound at room temperature over a prolonged period of time (days), without noticeable or undesirable reactions: a potential for spontaneous ignition is not expected. In addition, it is found to be non flammable during the reference test. The substance does not contain chemical groups associated with explosive properties and it is incapable of reacting exothermically with combustible materials on the basis of the chemical structure.