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Physical & Chemical properties

Boiling point

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Description of key information

Boiling point_OECD 102/EU Method A.2_DSC: decomposition from approximately 300 °C at 100 kPa

Key value for chemical safety assessment

Additional information

The boiling point of the C20-24 sodium sulfonate (Benzenesulfonic acid, mono-C20-24 (even)-sec-alkyl derivs., para-, sodium salts) was determined to a procedure compatible with EU Method A.2 and OECD Guideline 103 in compliance with GLP (Fox, 2015c). Differential scanning calorimetry was chosen as method. After being heated to 400 °C, the residue had lost approximately 29% and 35% of its original weight for Determinations 1 and 2 respectively. Although the baseline deviation at approximately 300 °C was not significant in magnitude, due to it initially indicating an exothermic event and then becoming somewhat erractic, it was considering this was the onset of decomposition. An investigative run up to only 300 °C showed no deviation or erratic trend in the baseline and the residue had lost less than 1% of its initial weight. The residue's appearance was visibly no different to that of the test item. Conclusively, the test item has been determined to decompose from approximately 300 °C (573 K) at 100 kPa. As the test item decomposed, no value for boiling temperature could be determined.