Registration Dossier
Registration Dossier
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EC number: 284-748-5 | CAS number: 84962-50-5
Endpoint summary
Administrative data
Description of key information
Orange 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 Yellow 236 is a orange organic powder at 20 °C and 1013 hPa.
The thermal behaviour of the test item was investigated by Differential Scanning Calorimetry method, according to the OECD guidelines 102 and 113. Based on the results of the DSC curves and the appearance of the test item after the tests, it is concluded the test item started to decompose from 257.9 °C (531.0 K); no melting/boiling reactions were recorded up to 500 °C.
Based on the thermal behavious, the vapour pressure can be estimated as negligible.
The substance is characterized by a relative density of 1.38 at 20 °C.
SOLUBILITY and PARTITION COEFFICIENT
The water solubility was determined by flask method and the substance was measured using a validated analytical HPLC-UV method.
The water solubility of test item was determined at 20 ± 0.5 °C using the flask method. Based on the measured concentrations, the water solubility resulted to be 60.7 ± 0.7 g/l at 20 °C and pH 4.6
The partition coefficient of the test item was determined using shake-flask method, in accordante with the method and procedures outlined into the OECD guideline 107. The partition coefficient (Pow) was determined to be 0.14, corresponding to the log Pow -0.85, at 20 °C and pH ca 6.75.
The concentration in the aqueous and octanol phases was determined by HPLC-UV validate method.
PHYSICAL HAZARDS
Acid Yellow 236 did not self-ignite up to 400 °C during the specific test; thus, no self-ignition temperature could be stated.
The flammability potential was investigated by preliminary test; under the experimental conditions, the substance could not be ignited, thus no further investigation was performed. Therefore, it has not to be classified as readily combustible solid in class 4.1, according to the UN Transport Regulation.
Screening procedure failed to evidence any reason for concern for both explosiveness and self-reactivity potential on the basis of the substance thermal behaviour. In addition, on the basis of its chemical structure, Acid Yellow 236 is incapable of reacting exothermically with combustible materials.
Therefore, no physical hazard(s) was identified.
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