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Inorganic Salts

Potassium Sulphate Extra Pure

RA002182 CAS 7778-80-5 Extra Pure

Identity

Product code
RA002182
CAS number
7778-80-5
Grade
Extra Pure
Purity
98.5%
Molecular formula
K2SO4
Molecular weight
174.27

Classification

Technical Data

Properties

PropertyValueUnit
Physical state at 20 °C Solid —
Colour White crystalline —
Odour Odorless —
pH value Approx. 7 —
Melting point/ Freezing point [°C] 1067 °C °C
Boiling point [°C] 1689 °C °C
Density [g/cm3] 2.662 g/cm3 g/cm3
Solubility in water [% weight] 110 g/L g/L

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

Specifications

ParameterSpecificationUnit Method
Appearance White crystalline powder — —
Assay 98.5 - 101.0 % % Titration after Ion exchange
pH (5% solution) 5.5 - 8.5 — —
Chloride (Cl) Max 0.004 % % —
Heavy metal Max 0.002 % % —
Iron (Fe) Max 0.001 % % —
Magnesium (Mg) Max 0.002 % % —
Calcium (Ca) Max 0.02 % % —
Loss on drying (105 °C) Max 1.0 % % —

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

Packaging

Pack size SKU
25 kg RA002182-PK-25KG
500 g RA002182-PK-500G
50 kg RA002182-PK-50KG
5 kg RA002182-PK-5KG