Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Dapsone is a crystalline white to off-white powder with no detectable odor and low relative density equal to 0.8201 at 20°C.The diameter of Dapsone particles is from 0.31 µm to 301.68 µm. The value of its melting point is 175oC and its boiling point estimated to be 438°C. A read across approach to 3,3’-DDS has been utilized to fulfil the information requirements for vapour pressure (< 1.5x10-3 Pa) and surface tension (73.6 mN/m at 20°C).

Dapsone is moderately soluble in water (380 mg/L at 20oC) and is soluble in alcohol, methanol, acetone and dilute hydrochloric acid. Dapsone has no oxidizing properties, is not considered flammable and is not explosive.

Additional information