Title: Phosphotungstic Acid CAS Registry Number: 12067-99-1 CAS Name: Tungstophosphoric acid Literature References: Approx composition 24WO3.2H3PO4.48H2O. The H2O content may vary appreciably. Prepn: Bailar, Inorg. Synth. 1, 132 (1939). Properties: White or slightly yellowish-green, slightly efflorescent crystals or cryst powder. Sol in about 0.5 part water. Also sol in alcohol and in ether. Use: As reagent for alkaloids and many other nitrogen bases, for phenols, albumin, peptone, amino acids, uric acid, urea, blood, carbohydrates; as biological stain.

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