Skip to content
Inorganic Salts

Ammonium Dichromate AR

RA000559 CAS 7789-09-5 AR

Identity

Product code
RA000559
CAS number
7789-09-5
Grade
AR
Purity
99.5%
Molecular formula
(NH4)2Cr2O7
Molecular weight
252.06

Classification

Technical Data

Properties

PropertyValueUnit
Physical state at 20 °C Solid —
Oxidising properties The substance or mixture is classified as oxidizing with the subcategory 2 —
Colour Orange to red —
Odour Odorless —
pH value 3 - 4 —
Melting point/ Freezing point [°C] 170 °C °C
Decomposition point [°C] 170 °C °C
Auto-ignition temperature [°C] 218 °C °C
Density [g/cm3] 2.15 g/cm3 g/cm3
Solubility in water [% weight] 360 g/L g/L

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

Specifications

ParameterSpecificationUnit
Appearance Orange colored crystalline powder —
Assay Min 99.5 % %
Insoluble matter Max 0.005 % %
Chloride (Cl) Max 0.005 % %
Sulphate (SO4) Max 0.01 % %
Loss on drying (105 °C) Max 3.0 % %
Calcium (Ca) Max 0.0025 % %
Sodium (Na) Max 0.02 % %

3 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 RA000559-PK-25KG
500 g RA000559-PK-500G
50 kg RA000559-PK-50KG