SODIUM CHROMATE

GRADES: EXTRA PURE / LR / AR / GR
Sodium chromate is the inorganic compound with the formula Na2CrO4. It exists as a yellow hygroscopic solid, which can form tetra-, hexa, and decahydrates. It is an intermediate in the extraction of chromium from its ores. Sodium chromate, like other hexavalent chromium compounds, is toxic and carcinogenic
MOLAR MASS: 
161.97g/mol

SODIUM CHROMATE
Odour Odourless
Density 2.698 g/cm3
Melting point 792 °C (1,458 °F; 1,065 K) (anhydrous)
20 °C (decahydrate)
Solubility in water 31.8 g/100 mL (0 °C)
84.5 g/100 mL (25 °C)
126.7 g/100 mL (100 °C)
Solubility slightly soluble in ethanol
Solubility in methanol 0.344 g/100 mL (25 °C)

APPEARANCE: YELLOW CRYSTALLINE SOLID

USES / APPLICATIONS:

Central role in the production of chromium from its ores, sodium chromate is used as a corrosion inhibitor in the petroleum industry. It is also a dyeing auxiliary in the textile industry and a wood preservative. It is a diagnostic pharmaceutical in determining red blood cell volume.
In organic chemistry, sodium chromate is used as an oxidant, converting primary alcohols to carboxylic acids and secondary alcohols to ketones. It is used to make pigments for paints and inks, other chemicals, and as a wood preservative.

PROPERTIES:

Sodium chromate is a yellow crystalline solid dissolved in a liquid medium, probably water. It is soluble in water. It is toxic by inhalation, ingestion and/or skin contact. It is non-combustible.

PACKAGING:

Local – 50kg HDPE Bag with Airtight inside polylinner
Export- 50 kg fibre drums.

SPECIFICATION – POTASSIUM DICHROMATE

SR NO. TEST EXTRA PURE / LR AR/ GR
1. Na2CrO4.4H2O N.W.: 234.07 N.W.: 234.03
2. Description A bright yellow crystalline powder Lemmon yellow crystals/crystalline powder.
3. Solubility 10% solution in water Clear & bright Clear & bright
4. Assay (Iodometric) NLT 99 % 99-102%
5. Insoluble matter 0.005% 0.005%
6. Chloride ( Cl ) 0.01% 0.01%
7. Sulphate ( SO4) 0.2% 0.2%
8. Calcium (Ca) 0.003 0.002
9. Iron (Fe) 0.005% 0.005%
10. Copper (Cu) 0.005% 0.005%