Phosphotungstic Acid Hydrate Powder (CAS 12501-23-4) | Tungstophosphoric Acid | Electron Microscopy & Analytical Reagent |

Phosphotungstic Acid Hydrate Powder

Tungstophosphoric Acid
Catalogue Number: ASD-620

Product Identification

• Chemical Name: Phosphotungstic Acid Hydrate

• Synonym: Tungstophosphoric Acid

• CAS Number: 12501-23-4

• Molecular Formula: H₃[P(W₃O₁₀)₄]·xH₂O

• Molecular Weight: ~2880.20 g/mol (dependent on hydration level)

• Appearance: White to pale yellow crystalline powder

• Grade: Laboratory / Analytical grade

Product Overview

Phosphotungstic Acid Hydrate is a heteropoly acid widely used in electron microscopy, histology, analytical chemistry, catalysis, and materials science research. Its strong acidic character and complex metal-oxide structure provide excellent staining, precipitation, and catalytic properties.

This reagent is valued for:

• High electron density (ideal for contrast enhancement in microscopy)

• Strong precipitation ability for alkaloids and proteins

• Catalytic activity in organic synthesis

• Stability in aqueous solution

AusAmics supplies high-purity Phosphotungstic Acid Hydrate powder manufactured under controlled conditions for reliable laboratory performance.

Key Applications

1. Electron Microscopy (TEM)

• Negative staining of viruses, proteins, and biological macromolecules

• Contrast enhancement in transmission electron microscopy

• Component in fixative systems

2. Histology & Cytology

• Used in Masson’s Trichrome staining

• Differentiation of collagen and muscle fibers

• Improved tissue contrast

3. Analytical Chemistry

• Precipitation reagent for alkaloids and nitrogenous compounds

• Formation of heteropoly complexes

• Quantitative and qualitative analysis applications

4. Catalysis

• Acid catalyst in esterification and oxidation reactions

• Recyclable heteropoly acid catalyst

• Used in green chemistry research

5. Material Science

• Synthesis of tungsten oxide nanomaterials

• Polymer doping applications

• Sensor and electronic material development

Chemical & Physical Properties

Storage & Handling

• Store at 15–25°C in a cool, dry environment

• Keep container tightly sealed

• Protect from moisture

• Avoid prolonged exposure to light

Preparation of Solutions

1. Accurately weigh required quantity.

2. Dissolve in distilled or deionised water with stirring.

3. Prepare concentrations as required (commonly 1–5% w/v for staining).

4. Store prepared solutions in tightly sealed containers.

Intended Use

For laboratory research and industrial applications only.
Not for human, veterinary, or food use.

Quality & Documentation

• Manufactured under controlled production standards

• Batch-specific COA available

• SDS available upon request

• Technical support provided by AusAmics Life Science

Customs & Trade Information

HS Code: 2811.19.90
Other inorganic acids and oxygen compounds of non-metals (heteropoly acids classification)

(Confirm with freight forwarder if country-specific classification required.)