Description

Phosphotungstic Acid CAS NO 1343-93-7 is a versatile heteropoly acid with a Keggin-type structure, serving as a powerful acid catalyst and oxidizing agent. Its high proton mobility and thermal stability make it a critical reagent for facilitating complex organic transformations and material synthesis. This compound is essential for research and industrial applications in catalysis, analytical chemistry, and the development of advanced functional materials.

Application

• Catalysis: Acts as a highly efficient, reusable solid acid catalyst for esterification, alkylation, and other organic synthesis reactions.
• Analytical Chemistry: Used as a precipitating and staining agent for the detection and quantification of alkaloids, proteins, and other basic compounds.
• Material Science: A key precursor for synthesizing electrochromic and photochromic thin films, as well as functional nanocomposites.
• Corrosion Inhibition: Forms protective conversion coatings on metal surfaces, particularly for steel and aluminum alloys.
• Biomedical Research: Employed as an electron-dense stain in electron microscopy for visualizing cellular and viral structures.
• Environmental Technology: Investigated for use in photocatalytic processes for the degradation of organic pollutants in water treatment.

Basic Information

Product Name	Phosphotungstic Acid
CAS No.	1343-93-7
Molecular Formula	H3PW12O40·xH2O
Molecular Weight	2880.05 (Anhydrous basis)
Synonyms	Dodecatungstophosphoric Acid; Tungstophosphoric Acid; PTA; 12-Tungstophosphoric Acid; Phosphowolframic Acid; Keggin Acid; PW12; H3PW12O40
EINECS	215-688-5

Quality Control

Our Phosphotungstic Acid is manufactured under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets high-purity standards for research and industrial use. A detailed Certificate of Analysis (COA) is provided with every shipment, confirming key parameters such as assay, heavy metal content, and loss on drying.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic nature, minimize exposure to atmospheric moisture to prevent caking and maintain chemical integrity.

Specification

Item	Specification
Appearance	White to pale yellow crystalline powder
Identification (IR)	Conforms
Assay (as H3PW12O40)	≥ 99.0%
Loss on Drying	≤ 2.0 %
Solubility (in Water)	Clear, colorless solution
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm
Sulfate (SO4)	≤ 100 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.