Registration Dossier
Registration Dossier
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EC number: 416-600-4 | CAS number: -
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is a solid which decomposes before boiling
- Justification for type of information:
- The determination of the boiling point of HAT ISO is scientifically not justified. REACh Regulation No. 1907/2006, Annex VII, Col. 7.3.2, states as follows: “Boiling point: The study does not need to be conducted - for substances which decompose before boiling (e.g. auto-oxidation, rearrangement, degradation, decomposition, etc.)” HAT ISO is a high-melting substance with a melting range of 239 – 252 °C. This value was determined on a Kofler hot bar according to the Guidelines EU A 1 and OECD 105 and can be assumed as valid. It is likely to assume that at such a high melting range at least partial decomposition occurs, and the substance will not be able to evaporize without considerable decomposition, even under reduced pressure. The estimation of a boiling point of HAT ISO with the US EPA EPIWIN v3.12 programme for estimation of physico-chemical parameters resulted in a boiling point of 590.8 °C according to the adapted Stein & Brown method. Note that the estimation of the melting point of HAT ISO with the EPIWIN v3.12 programme revealed a value of 255 °C, which is in good correlation with the measured value. Therefore, the estimated boiling point is reliable, and performance of a boiling point study is not necessary.
Reference
Description of key information
The determination of the boiling point of HAT ISO is scientifically not justified.
REACh Regulation No. 1907/2006, Annex VII, Col. 7.3.2, states as follows:
“Boiling point: The study does not need to be conducted
- for substances which decompose before boiling (e.g. auto-oxidation, rearrangement, degradation, decomposition, etc.)”
The calculation of a boiling point of HAT ISO with the US EPA EPIWIN v3.12 programme for estimation of physico-chemical parameters resulted in a boiling point of 590.8 °C according to the adapted Stein & Brown method. Note that the estimation of the melting point of HAT ISO with the EPIWIN v3.12 programme revealed a value of 255 °C, which is in good correlation with the measured value.
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 863.95 K
Additional information
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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