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.

Where is Phosphotungstic acid used?

• Pharmaceutical manufacturing: precipitating agent for alkaloids and basic nitrogen compounds during purification and quality control
• Histology and electron microscopy: tissue staining reagent that provides contrast enhancement for collagen and connective tissue structures
• Solid acid catalyst for esterification and condensation in fine chemical production
• Printing and packaging: inks and dye fixatives requiring controlled precipitation of colorants
• It supports acid-catalyzed organic synthesis reactions.

Commercial specifications

• Reagent grade meets purity thresholds for laboratory and pharmaceutical use
• Technical grade
• Packaging from laboratory-scale units to multi-kilogram consignments