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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Appearance / physical state / colour

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Administrative data

Link to relevant study record(s)

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Endpoint:
appearance / physical state / colour
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
From a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance"
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Handbook data
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
crystalline
Colour:
Colourless
Odour:
other: no data
Substance type:
inorganic
Conclusions:
According to the reference, sodium thiosulphate appears as a colourless monoclinic crystalline solid.
Endpoint:
appearance / physical state / colour
Type of information:
other: Handbook data
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
From a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance"
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Handbook data
GLP compliance:
not specified
Physical state at 20°C and 1013 hPa:
solid
Form:
powder
Colour:
No data
Odour:
other: no data
Substance type:
inorganic
Conclusions:
According to the reference, sodium thiosulphate appears as a powder.

Description of key information

Sodium thiosulfate appears as a colourless monoclinic crystalline solid.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid
Form:
solid: crystalline
Colour:
colourless

Additional information

For the evaluation of this endpoint, data from two handbooks (CRC handbook and Merck Index) were used in a weight of evidence approach. Handbook data considered to be from a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance". Useful reference books and data compliations containing peer reviewed physico-chemical data include the Merck Index and the CRC Handbook of Chemistry and Physics.

Data available from these handbooks describe sodium thiosulfate appears as a colourless monoclinic crystalline solid.