Phosphotungstic acid

Phosphotungstic acid (CAS 12501-23-4), also known as phosphowolframic acid, is a heteropolyacid used industrially as a strong acid catalyst and precipitating reagent. Its high acidity and oxidizing capacity make it a functional choice across catalysis and analytical chemistry. In pharmaceutical manufacturing, it acts as a precipitating agent for alkaloids and basic nitrogen compounds during purification and quality control workflows. Histology and electron microscopy laboratories use it as a tissue staining reagent.

This chemical provides contrast enhancement for collagen and connective tissue structures in biological samples. As a solid acid catalyst, it supports acid-catalyzed organic synthesis reactions including esterification and condensation processes. These processes are highly relevant to fine chemical production. In printing and packaging, it contributes to the formulation of certain inks and dye fixatives where controlled precipitation of colorants is required for the final product.

Phosphotungstic acid is supplied as a crystalline solid, typically as a hydrated powder or granules. It is available in reagent-grade and technical-grade specifications to meet various industrial and laboratory requirements. Reagent-grade material commonly meets purity thresholds suitable for laboratory and pharmaceutical use. Bulk quantities are accessible for industrial catalyst and manufacturing applications with various packaging options.

Packaging options range from laboratory-scale units to multi-kilogram consignments. This ensures that both small-scale research facilities and large-scale industrial manufacturers can source the material according to their specific needs.