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Sodium Dichromate

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Description

Sodium dichromate is the inorganic compound with the formula Na2Cr2O7, used  as its dihydrate Na2Cr2O7·2H2O. Dichromate salts are strong oxidizing agents.

General Specifications of Sodium Dichromate:
Appearance: Bright Orange Crystals
Solubility: Readily soluble in water
Specific Gravity at 20C: 2.35
Stability in Air: Deliquescent
Assay as Na2Cr2O 7-2H2O %: 99.0 min
Sulphate as Na2SO4 %: 0.2 max
Chlorides as NaCl %: 0.4 max
Iron as Fe %: 0.003 max
pH of 10% solution: 3.6 – 4.4

Sodium Dichromate Dihydrate ACS Reagent Grade:
Na2Cr2O7 . 2H2O — Formula Wt 298.00
CAS Number 7789-12-0

REQUIREMENTS
Assay: 99.5-100.5% Na2Cr2O7-2H2O
MAXIMUM ALLOWABLE
Insoluble matter: 0.005%
Ammonium hydroxide precipitate: 0.005%
Chloride (Cl): 0.005%
Sulfate (SO4): 0.01%
Calcium (Ca): 0.003%
Aluminum (Al): 0.002%

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