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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties

Boiling point

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boiling point
Type of information:
Adequacy of study:
key study
Study period:
August 2022
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model, but not (completely) falling into its applicability domain, with adequate and reliable documentation / justification
Justification for type of information:
Estimate calculation is adapted from Stein & Brown method, using US EPA EPISUITE Software.
no guideline available
Principles of method if other than guideline:
Estimate calculation is adapted from Stein & Brown method.
GLP compliance:
Boiling pt.:
438 °C
Remarks on result:
other: calculated using EPISUITE (v4.10)
The estimated QSAR data was calculated using EPISUITE (v4.10). The boiling point of Dapsone (4,4’-DDS) was estimated to be 438 Deg C.

Description of key information

Value estimated by US EPA 2011 Estimation Programs Interface Suite™, v 4.10.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
438 °C

Additional information

EpiSuite estimation based on Stein & Brown method and Chemicalbook give both a boiling point value of 438 °C (no pressure specified)