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Inorganic Salts

Sodium Dichromate Dihydrate AR/ACS

RA002364 CAS 7789-12-0 AR/ACS

Identity

Product code
RA002364
CAS number
7789-12-0
Grade
AR/ACS
Purity
99.5%
Molecular formula
Na2Cr2O7.2H2O
Molecular weight
298

Classification

Technical Data

Properties

PropertyValueUnit
Physical state at 20 °C Solid —
Colour Orange Crystalline —
Odour Odorless —
pH value 3.5 - 4.0 —
Melting point/ Freezing point [°C] 91 °C °C
Vapour density 10 —
Density [g/cm3] 2.35 g/cm3 g/cm3

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

Specifications

ParameterSpecificationUnit Method
Appearance Orange crystalline powder — —
Assay 99.5 - 100.5 % % iodometric
Insoluble matter Max 0.005 % % —
Chloride (Cl) Max 0.005 % % —
Sulphate (SO4) Max 0.01 % % —
Calcium (Ca) Max 0.003 % % —
Aluminium (Al) Max 0.002 % % —
Magnesium (Mg) Max 0.005 % % —
Potassium (K) Max 0.01 % % —

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 RA002364-PK-25KG
500 g RA002364-PK-500G
50 kg RA002364-PK-50KG