Registration Dossier
Registration Dossier
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EC number: 249-707-8 | CAS number: 29590-42-9
Boiling point
Administrative data
Link to relevant study record(s)
Description of key information
The boiling point of IOA is 196.8 °C at 761.8 mm Hg using a dynamic method per OECD TG103.
Key value for chemical safety assessment
Additional information
The determination of the boiling point in the key study was based on OECD TG103, and was GLP-compliant. After the first experimental run in the key study, the test sample changed in appearance which may be due to a chemical transformation. The method is restricted to test substances that do not undergo chemical reaction at temperatures below the boiling point. This study is therefore considered reliable with restrictions. The supporting study followed a differential scanning calorimetry (DSC) method, where IOA had a boiling point of 223 °C at 100.4 kPa. The supporting study was also conducted in accordance with OECD TG103, and was GLP compliant. This study observed some polymerization before boiling. Once again, the method is restricted to test substances that do not undergo chemical reaction at temperatures below the boiling point. The determination of the boiling point of IOA and other multi-functional acrylates is of minimal value. The double bond in these chemicals is so reactive that boiling them at atmospheric pressure results in polymerization and decomposition. As a result, these substances are not boiled at atmospheric pressure in normal manufacture or use. Moreover, distillation under vacuum at lower temperature would generate a pure substance, since the inhibitor would be left behind. Without an inhibitor present, the pure substances quickly polymerize, even at room temperature. It is the sponsor’s judgment that the dynamic method results provide the most accurate assessment of IOA boiling point.
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