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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The majority of data on the physical and chemical properties of calcium thiosulfate were taken from handbooks (including CRC Handbook of Chemistry and Physics).

Waivers are proposed for following endpoints: boiling point, particle size distribution, vapour pressure, partition coefficient, surface tension, flash point, auto flammability, flammability, explosiveness, oxidising properties, stability in organic solvents, dissociation constant and viscosity as well as for pyrophoric properties and flammability in contact with water.

Calcium thiosulfate (Ca2S2O3, molecular weight 152.21 g/mol), CAS number 10124-41-1, EC number 233-333-7

Calcium thiosulfate appears as a triclinic crystalline solid.

Decomposition temperature: 45°C (reliable handbook data)

Relative density: 1.87 (reliable handbook data)

Water solubility: 1000 g/L at 3°C (very soluble, reliable handbook data)