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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Description of key information

Data from two studies. 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
198.5 °C

Additional information

The melting point of LAS was determined in two different studies. In the first study, melting point was determined using EU method A.1. A melting point range of 333.2 -388.2 K (60 -116 degrees C) at 102.1 kPa was found. In the second study, the melting point was determined using thermal analysis. A melting point of 198.5 degree C was found. The value of 198.5 degrees C is the preferred value based on previous assessments.