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Physical & Chemical properties

Boiling point

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Description of key information

Bp: decomposition occurs ≥ 125 °C at 1 atm pressure, the boiling point > 125 °C at 1 atm pressure;  EU Method A.2, Wil Research B.V. 2015

Key value for chemical safety assessment

Additional information

The boiling temperature was examined using EU Method A.2. and the Differential Scanning Calorimetry method. Reaction and/or decomposition of the test substance were observed during DSC experiments at temperatures ≥125°C (or ≥ 398 K) at 1 atmosphere pressure under a stream of nitrogen. Boiling of the test substance was not observed below the temperature at which reaction and/or decomposition started. The boiling temperature of the substance has been determined to be > 125°C at 1 atmosphere pressure.


A study has been conducted to EU Method A.2 / OECD TG 103 – DSC method indicating that the substance boils above a decomposition temperature of 125°C under inert gas conditions. Further testing at reduced pressures is omitted on the following basis:

1. Adequate information is already available: i. on the substances physical state (liquid up to 125°C); ii. for Classification and Labelling Purposes and where reliable data is provided: on Flash Point (> 370°C), Auto-ignition temperature (260°C, 1 atm) and Vapour Pressure (0.002 Pa at 25°C).

2. In accordance with REACH Regulation (EC) No. 1907/2006 Annex VII, column 2 section 7.3 the study does not need to be conducted since the substance decomposes before boiling (e.g. autooxidation, rearrangement, degradation, decomposition etc.).

3. In accordance with section 2 of REACH Regulation (EC) No. 1907/2006 Annex XI, further testing is omitted on the basis that the substance undergoes autooxidation/rearrangement at temperatures > 125 °C; with due regard OECD TG 103, paragraph 4 which states that the methods in the guideline are applicable to liquids provided they do not undergo chemical changes below the boiling point. Additional testing to derive a boiling point is not technically feasible; in that testing at reduced pressure would yield information only on boiling points of degradation products (not of the substance). Additional testing would not yield relevant further information for classification and labelling purposes.



1. ECHA Guidance on Information Requirements and Chemical Safety Assessment (Chapter R.7a: Endpoint Specific Guidance, R., July 2015).

2. REACH Regulation (EC) 1907/2006, Annex XI, section 2

3. CLP Regulation (EC) 1272/2008, Annex I, section 2.6.1

4. ECHA Guidance on Application on the CLP Criteria, (v4.1, June 2015)

5. OECD TG 103 (July 1995)