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Chromium(III) phosphate

Chromium phosphate; Chromic phosphate; Chromium monophosphate

CAS 7789-04-0

Chemical Formula CrPO4

Molecular Weight 146.96 g/mol

Chromium(III) phosphate is an inorganic compound with the chemical formula CrPO₄. It is a colored solid, with the anhydrous form being green and the hexahydrate form being violet. This compound is used in various applications, including catalysis, materials science, and potentially as a pigment.

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Industrial Uses

1. Metal Treatment

Chemical Conversion Coating: Chromium(III) phosphate is used to create a chemical conversion coating on various metals like zinc, zinc alloys, aluminum, and aluminum alloys. The process involves applying an acidic aqueous solution of chromium(III) phosphate to the metal surface, which then reacts to form a stable, insoluble film. This film acts as a barrier, protecting the underlying metal from corrosion.
Enhanced Corrosion Resistance: The chromium(III) phosphate coating provides excellent corrosion resistance, particularly in environments with exposure to moisture and chlorides. This is crucial for metals used in harsh or outdoor conditions, where corrosion can significantly degrade their structural integrity and appearance.
Improved Adhesion: The conversion coating also improves the adhesion of subsequent coatings like paints or other protective layers. This is because the coating provides a roughened surface that enhances the mechanical bonding of the applied coating.

2. Paints, Coatings & Adhesives

Corrosion Protection: Chromium(III) phosphate paints are often applied to metal substrates like zinc, zinc alloys, aluminum, and aluminum alloys. The aqueous acidic solution forms a protective film on the metal surface, preventing rust and other forms of corrosion.

Specifications

Assay	99%
Appearance	Grayish-green or violet powder
Odor	Odorless
Boiling Point	Decomposes before boiling
Melting Point	Not determined
Density	3.0 g/cm3
Solubility	Insoluble in water; slightly soluble in strong acids
Viscosity	Not applicable
Flash Point	Not applicable

Hazard Symbols

FAQs

1. What is the current price of Chromium(III) phosphate in India?
The price of Chromium(III) phosphate can vary based on factors such as purity, quantity, etc. For the most accurate and competitive pricing, please contact us at +91.6301 00 6301 directly for a customized quote tailored to your needs.

2. Where can I buy Chromium(III) phosphate in India?
You can purchase Chromium(III) phosphate from MULTICHEM, a leading exporter with a reputation for quality and reliability. We provide convenient options for bulk orders and direct shipments across global markets. For more details on how to place an order, please visit our website or contact our sales team.

3. What is the minimum order quantity (MOQ) for Chromium(III) phosphate?
Our minimum order quantity (MOQ) for Chromium(III) phosphate is designed to cater to both small-scale and large-scale needs. The MOQ depends on the packing size of the product which could range from 25 kg to 250kg.

4. How can I ensure the quality of Chromium(III) phosphate supplied by Multichem?
We adhere to stringent quality control processes to ensure that our products meet the highest standards of purity and effectiveness. They undergo rigorous testing and quality checks to guarantee that they comply with industry specifications. We provide a Certificate of Analysis (CoA) with every shipment to ensure transparency and quality assurance.