Chromic Acid Derivatives

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It has the appearance of orange-red crystals.

Uses. It has been used in pyrotechnics and in the early days of photography as well as in lithography, as a source of pure nitrogen in the laboratory, and as a catalyst. It is also used as a mordant for dyeing pigments, in the manufacturing of alizarin, chrome alum, leather tanning and oil purification.Chemical formula‎: ‎(NH₄)₂Cr₂O₇UN number‎: ‎1439CAS Number‎: ‎7789-09-5RTECS number‎: ‎HX7650000

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- 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

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Potassium dichromate is a common inorganic chemical reagent most commonly used as an oxidizing agent in various laboratory and industrial applications. As with all hexavalent chromium compounds, it is acutely and chronically harmful to health.

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Basic Chromium Sulfate is mainly used in tanning of processing leather industry or synthesis of other chromium based re-tanning agents and production of chromic compound. It is also used in dyeing of khaki cloth and in manufacture of chrome-based dyestuffs.

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Chromic acid is an intermediate in chromium plating, and is also used in ceramic glazes, and colored glass. Because a solution of chromic acid in sulfuric acid (also known as a sulfochromic mixture or chromosulfuric acid) is a powerful oxidizing agent, it can be used to clean laboratory glassware, particularly of otherwise insoluble organic residues.

Chromic acid was widely used in the instrument repair industry, due to its ability to "brighten" raw brass. A chromic acid dip leaves behind a bright yellow patina on the brass. Due to growing health and environmental concerns, many have discontinued use of this chemical in their repair shops.

It was used in hair dye in the 1940s, under the name Melereon.^[7]

As a bleach in black and white photographic reversal processing.^[

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