Potassium Dichromate

Potassium dichromate (K₂Cr₂O₇, CAS 7778-50-9), also called potassium bichromate, is a bright orange-red crystalline solid and one of the most widely used hexavalent-chromium compounds in industry. It dissolves readily in water to give an acidic, strongly oxidising orange solution, and is prized for its stability, consistent assay and powerful, reproducible oxidising behaviour.

Potassium dichromate is supplied in technical, reagent and analytical-reagent grades and serves as a primary-standard oxidising agent with a sharp redox potential. Because it contains hexavalent chromium, it is a toxic, carcinogenic and tightly regulated substance: it must be handled, stored and transported in full accordance with REACH, OSHA and local chemical-safety rules, and we supply it strictly for legitimate licensed industrial, laboratory and manufacturing use.

Applications

• Analytical chemistry — primary standard in redox titrations (COD testing, iron and alcohol determination) and as a reference oxidant.
• Metal finishing — chromate conversion coatings, passivation and corrosion protection of steel, zinc and aluminium.
• Leather tanning — preparation of chrome-tanning liquors for durable, high-quality leather.
• Pigments, ceramics and glass — manufacture of chrome pigments, glazes and coloured glass.
• Wood preservation — component of chromated preservative formulations.
• Screen printing, photo-processes and pyrotechnics — dichromate sensitising of gelatine and specialty oxidising mixtures.
• Organic synthesis — controlled oxidation of alcohols to aldehydes, ketones and carboxylic acids.

Euro Chemical Supplies offers potassium dichromate factory-direct from ISO-certified manufacturers, lot-tested to specification with a certificate of analysis, in laboratory packs, fibre and plastic drums and bulk quantities, complete with the hazardous-goods documentation and export paperwork required for compliant shipping worldwide.

As a trusted potassium dichromate supplier, we help laboratories, tanneries and metal-finishing plants buy potassium dichromate in the right grade and volume — from a single drum to bulk orders delivered worldwide. Request a quote or explore our industrial chemicals range.