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Sodium dichromate dihydrate (Na2Cr2O7•2H2O)-Crystalline

Sodium dichromate dihydrate (Na2Cr2O7•2H2O)-Crystalline

CAS: 7789-12-0
Molecular Formula: Na2Cr2O7•2H2O
Purity: 99%
Products Code: TR1124080101CY
Specification Model: -100 Mesh
Hazardous Class: Class 5.1
EINECS No.: 234-190-3
UN No.: UN3087
Package Class: PG II
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Sodium dichromate dihydrate (Na2Cr2O7•2H2O)-Crystalline introduce:

Characteristic

 

Sodium dichromate is the inorganic compound with the formula Na2Cr2O7. Usually, however, the salt is handled as its dihydrate Na2Cr2O7·2H2O. 




Chemical formula:Na2Cr2O7

Molar mass:261.97 g/mol (anhydrous);298.00 g/mol (dihydrate)

Appearance:bright orange

Odor:odorless

Density:2.52 g/cm3

Melting point:356.7 °C (674.1 °F; 629.8 K)

Boiling point:400 °C (752 °F; 673 K) decomposes

Solubility in water:73 g/100 mL at 25 °C

Solubility in other solvents:soluble in methanol, ethanol

Refractive index (nD):1.661 (dihydrate)

 


Application

 

Sodium dichromate is used as a strong oxidizing agent in organic synthesis. It is used in metal finishing as an aid of corrosion resistance, manufacture of inorganic chromate pigments and in the preparation of colored glass and ceramic glazes. It is used as a mordant for acidic dyes to improve their color-fast properties and as a corrosion inhibitor in undercoats and primers.
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