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
| Physical Properties | |
| 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) |
| SPECIFICATION – SODIUM CHROMATE | |||
| 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 | Lemon 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% |
APPEARANCE:
YELLOW CRYSTALLINE SOLID
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.
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.
PACKAGING:
Local – 50kg HDPE Bag with Airtight inside polylinner
Export- 50 kg fibre drums.