Sodium dichromate dihydrate is a odouless orange crystalline product that dissolves readily in water. It is hygroscopic material and readily absorbs moisture from the atmosphere.Physical properties:
|
S.No
|
Description
|
Specifications
|
|
1
|
Apperarance |
Bright Orange Crystals
|
|
2
|
Chemical formula |
Na Cr2 O, 2H2 O
|
|
3
|
Molecular Weight |
298.0
|
|
4
|
Solubility |
Readily soluble in water
|
|
5
|
Specific Gravity at 20C |
2.35
|
|
6
|
Heat of Solution cal /gm |
Minus 28.2
|
|
7
|
Stability in Air |
Deliquescent
|
|
Chemical properties:
|
S.No
|
Description
|
Specifications
|
|
1
|
Na 2 Cr 2 O 7 .2H 2 O (%) |
99.0 min
|
|
2
|
Sulphate as Na 2 SO 4 (%) |
0.2 max
|
|
3
|
Chlorides as NaCl (%) |
0.4 max
|
|
4
|
Iron as Fe (%) |
.003 max
|
|
5
|
PH (10% solution) |
3.6 – 4.4
|
|
Applications
- Source in preparing chromium based derivative
- Screen printing & Photographic engraving
- Electroplating
- Pyrotechnics and explosives
- Pigment preparation like chrome oxide green, lead chromate etc.
- Wood preservative for protection from termites and fungi
- Metal treating and corrosion inhibitor
- Oil well drilling as treating agents in drilling mud systems
- Catalyst for the chromium metal production
- As an oxidizing agent in organic synthesis
Packaging:
- 50 kg inner layer polyethylene, outer layer HDPE woven bags
- 1000 kg Jumbo bags. Palletized and shrink wrapped
Storage Conditions:
- Store in cool and dry places
- Keep away from sunlight and heat sources, combustible organic materials, volatile organic compounds, flammable solvents and other readily oxidizable material
- Avoid storage on wood floors
- Remove and dispose of any spilled dichromate, don’t return to original container
- Protect against physical damage by handling vehicles like forklift or crane hooks, so as to prevent damage to bags
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