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Colour Chromes recorded and export sales of INR 50 crores in 2005-2006.

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Potassium dichromate is available in small orange colored, free-flowing crystals. It is non-hygroscopic, and unlike sodium dichromate dissolves sparingly in water to give a saturated solution of 14% only at 250C.

Application

Its special uses are in the manufacture of safety matches, pyrotechnics and explosives.
Other uses are in printing inks, synthetic perfumery, glues and adhesives, process engraving and lithography, photography and film processing and as an analytical reagent in Laboratories.
 


The Indian Standard Specification for Technical Grade-IS 250: 1961 is as follows:

Potassium Dichromate 

As K2Cr2O7 99.00% Min

Sulphates as SO4 0.30% Max.
Chlorides as CI 0.50% Max.
Calcium as CaSO4 0.10% Max.
Free moisture 0.50% Max
Matter insoluble in water 0.30% Max


Packing
 
50 kg. Polythene lined jute bags.

Storage & Shelf Life

It is non-caking and if stored in a cool, dry place away from heat, shelf life is indefinite.
Being a powerful oxidizing agent, it should not be stored along with inflammable organic 
Chemicals.

Physiological Aspect

Handle all solutions of dichromate with gloves on. If it comes in contact with any cuts or 
Bruises on the skin, immediate washing of the affected part with a 5% solution of sodium bisulphate and then with water is recommended, to prevent the formation of chrome sores.


 

 

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