Registration Dossier
Registration Dossier
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EC number: 916-540-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Acid Orange 127 is a brown powder at 20 °C and 1013 hPa; it decomposes before melting/boiling, vapour pressure can be considered as negligible.
The test item is water soluble (i.e. 0.44 g/l). The partition coefficient log Pow was determined to be 1.2.
The substance is not auto-flammable/flammable/explosive/oxidising agent.
Additional information
APPEARANCE AND STATE
Acid Orange 127 is a brown powder at 20 °C and 1013 hPa. It is characterized by a particle size whiting a D50 of 304.8 µm.
The thermal behaviour investigation show that the substance undergoes decomposition before melting/boiling (at ca 290 °C).
Due to the thermal behaviour, the vapour pressure can be considered as negligible.
Relative density was determined by means of a pycnometer and resulted to be 1.426 at 20 °C.
SOLUBILITY and PARTITION COEFFICIENT
Solubility was performed following the recommendations of the OECD method 105, by flask method. The concentration in the clear solvent phase was determined by a validated HPLC method. The water solubility of test item was determined to be 0.44 g/l at 20 °C and pH 8.35-9.21.
The partition coefficient octanol-water determination was performed using the shake flask method; the phases were analysed by a validated HPLC method. The partition coefficient Pow was determined to be 16.68 (i.e. log Pow of 1.2) at 24 °C and pH 6.3-6.7.
PHYSICAL HAZARDS
On the basis of the test results, the substance does not meet the criteria to be classified as self-heating substance, according to the CLP Regulation (EC) No 1272/2008.
The flammability test performed showed that Acid Orange 127 did not propagate burning of a 200 mm length of the strip in less than four minutes, therefore the substance does not meet the criteria to be considered as flammable.
Screening procedure failed to evidence any reason for concern for explosiveness because, on the basis of the thermal behaviour analysis, the substance decomposes under 500 °C with an exothermic decomposition energy less than 500 J/g.
Based on the chemical structure, the substance can be deemed to be not potentially oxidizing agent.
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