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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide (MMDS) is a white, odourless powder. The melting temperature of MMDS was determined to be 150°C using DSC and the boiling point of MMDS was not determined because a reaction and/or decomposition of MMDS was observed starting at 280°C. The relative density of MMDS is 2.00 and the vapour pressure of the test substance at 20°C (293K) was 0.0017 Pa = 0.000013 mm Hg. The Pow and the water solubility were not determined in accordance with Column 2 of Annex VII Section 7.7 and 7.8 and Section 2 of Annex XI of the REACH regulation because the tests cannot be performed as the substance decomposes rapidly (hydrolytically unstable). The flash point of MMDS does not to be determined as this is a property of liquids only. MMDS is non explosive, non-flammable and has no oxidising properties.