Registration Dossier
Registration Dossier
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EC number: 235-406-9 | CAS number: 12220-06-3
Endpoint summary
Administrative data
Description of key information
Orange-red organic powder. The substance decomposes before melt/boil; it is very water soluble and has a negative log Kow.
Based on the available information, it is not characterized by physical hazard(s).
Additional information
APPEARANCE AND STATE
Acid Orange 067 is an orange-red organic powder at 20 °C and 1013 hPa; it is characterized by particles with a diameter in the range of 100 – 1000 µm.
Thermal behaviour was investigated by the Differential Scanning Calorimetry (DSC): during the heating the test item showed endothermic signals in the temperature range of approx. 60 - 170 °C that can be associated with the water evaporation of the test item. Around 300 °C one exothermic peak could be observed, which was assumed to the decomposition of the test item; no phase transition from a solid to liquid state was observed. Thus, the substance decomposed before melt/boil. Because of the physicochemical properties, vapour pressure and surface tension can be considered as negligible.
SOLUBILITY and PARTITION COEFFICIENT
Water solubility and partition coefficient were determined by flask and shake flask method, according to the OECD 105 and 107 guidelines, respectively. The concentration of the test substance in the water and n-octanol was determined by suitable validated HPLC-VIS analytical method.
The water solubility was determined to be 0.33 ± 0.05 g/l (95 % confidence interval) at 20 ± 0.5 °C and the partition coefficient (Pow) in n-octanol-water was determined to be 11.1 ± 2.1 (95 % confidence interval).
PHYSICAL HAZARDS
Acid Orange 067 does not ignite and propagate combustion. It does not meet the criteria to be considered as flammable/explosive/oxidising.
The relative self-ignition temperature of test item was determined to be 280 °C.
The flammability test was carried out according to the EU Method A.10 and the preliminary test gave negative results.
In a series of six tests using the BAM friction apparatus with a force of 360 N no reaction was observed; in a series of six tests using the BAM Fallhammer with a mass of 10 kg and a drop height of 50 cm no reaction was observed; thermal sensitivity using the Koenen-Test.
In the course of the study burning rate of the test item mixed with a combustible substance could not be determined, therefore, the substance is not considered to be an oxidizing substance.
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