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Inorganic Salts

Sodium Thiosulphate Anhydrous AR

RA002469 CAS 7772-98-7 AR

Identity

Product code
RA002469
CAS number
7772-98-7
Grade
AR
Purity
98%
Molecular formula
Na2S2O3
Molecular weight
158.10

Classification

Technical Data

Properties

PropertyValueUnit
Physical state at 20 °C Solid —
Colour White crystalline —
Odour Odorless —
pH value 6.5 - 8 —
Melting point/ Freezing point [°C] Min 100 °C °C
Density [g/cm3] 1.66 g/cm3 g/cm3

These are recorded catalogue property values. Product specification limits, where available, are listed under Specifications.

Specifications

ParameterSpecificationUnit
Appearance White crystalline powder —
Assay Min 98 % %
Calcium (Ca) Max 0.01 % %
Heavy metal Max 0.001 % %
Insoluble matter Max 0.01 % %
Sulphide (S) Max 0.0001 % %
pH 6.0 - 8.5 —

2 grades of this substance are listed. Each grade is a separate product with its own specifications, pack sizes and documents.

Packaging

Pack size SKU
1 kg RA002469-PK-1KG