About Potassium Dichromate (CAS 7778-50-9)
Potassium Dichromate K2Cr2O7 is an essential inorganic chemical compound primarily utilized as an oxidizing agent across multiple industrial sectors. DPRJ Universal stands out as a leading Potassium Dichromate manufacturer and bulk supplier in India, offering 99.5% pure industrial and laboratory grade material with comprehensive documentation, including detailed COA, MSDS, and technical data support.
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- Chemical Name: Potassium Dichromate
- Purity: 99.5% (Minimum)
- CAS No.: 7778-50-9
- Appearance: Bright orange-red crystalline powder
- Formula: K2Cr2O7
- Molecular Weight / Molar Mass: 294.18 g/mol
- Equivalent Weight (Acidic Medium): 49.03 g/eq
- Valency Factor: 6
- Packaging: 50 KGS BAG
- Origin: India
Primary Applications
- Highly demanded in the leather industry for modern chrome tanning methods.
- Standard reagent used for precise spectrophotometer UV calibration processes.
- Powerful analytical component commonly deployed as acidified potassium dichromate in oxidization labs.
- Key compound used in wood preservation, potassium zinc chromate production, and textile dye mordanting.
- Employed for chemical preparation across multiple industrial manufacturing systems.
SKU: PD001
MPN: POTASSIUM-DICHROMATE-DPRJ-001
Category: Chemicals → Inorganic Compounds → Chromium Salts → Potassium Dichromate
Brand: DPRJ Universal
Price Range (Bulk)
₹200 - ₹230 per kg
Price valid until: 31 Dec 2026
Availability: In Stock for Bulk Orders
Customer Rating
⭐ 4.9 / 5
Based on 1,840 verified industrial buyers and distributors
“The premium crystalline texture and standard molecular weight parameter from DPRJ Universal ensure stable calibration outputs in our laboratory method workflows. Excellent wholesale supplier in Mumbai.”
— Verified Technical Manager, Qualigens Testing Hub
Shipping & Delivery
Destination: India (Qualigens standard distribution network across all states)
Shipping Cost: Free (Bulk Orders)
Handling Time: 1–2 Days
Transit Time: 2–5 Days
Return Policy
Return Window: 7 Days (for non-compliant quality parameters)
Return Method: Return By Mail / Logistics Pickup
Return Fees: Free Return (on verified technical or purity deviation)
Frequently Asked Questions
What is the primary use of Potassium Dichromate?
The primary industrial uses of Potassium Dichromate include leather tanning, wood preservation, and textile dyeing. It is also heavily utilized as an oxidizing agent in laboratory settings and industrial chemical preparation, as well as in UV calibration processes.
What is the molecular weight and chemical formula of Potassium Dichromate?
The chemical formula for Potassium Dichromate is K2Cr2O7. Its molecular weight (or molar mass) is approximately 294.18 g/mol.
How is Potassium Dichromate prepared or synthesized industrially?
Potassium dichromate preparation is typically carried out via a lab method or industrial scale reaction by reacting potassium chloride with sodium dichromate. It can also be synthesized through the industrial roasting process of chromite ore with potassium carbonate.
What is the Potassium Dichromate structure and colour?
Potassium Dichromate is famous for its distinct bright orange-red colour. Structurally, it features a dichromate anion consisting of two chromium atoms sharing a central oxygen atom, balanced by two potassium cations.
What is the oxidation state and equivalent weight of Potassium Dichromate?
In Potassium Dichromate (K2Cr2O7), the chromium atom is in the +6 oxidation state. The equivalent weight (eq wt) varies depending on the reaction; in acidic mediums where it gains 6 electrons (valency factor of 6), the equivalent weight is approximately 49.03 g/eq.
What are the key physical properties, such as structure and molecular mass?
Key properties include a molecular mass of 294.18 g/mol, an iconic orange crystalline appearance, and stable non-deliquescent crystals. Acidified potassium dichromate acts as a highly potent reagent in chemistry.
How is Potassium Dichromate used in leather and calibration industries?
In the leather industry, it serves as a critical agent in chrome tanning to stabilize animal hides. In analytical chemistry, high-purity potassium dichromate is standardly used in spectrophotometer UV calibration.
Is Potassium Dichromate hazardous and what are the handling precautions according to NFPA 704?
Yes, Potassium Dichromate is highly toxic, carcinogenic, and a strong oxidizer. According to the NFPA 704 standard, it poses severe health hazards. Handling requires strict PPE compliance, including gloves, respirators, and working in well-ventilated professional environments.
What happens when potassium chromate turns yellow or reacts?
Potassium chromate is yellow in color. Potassium dichromate (orange) and potassium chromate (yellow) exist in an equilibrium that shifts based on pH; adding a base converts the orange dichromate into yellow chromate.
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