| Customization: | Available |
|---|---|
| CAS No.: | 12067-99-1; 12501-23-4 |
| Formula: | H3o40pw12.Xh2o |
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Basic Information
Product Name: Phosphotungstic Acid
Abbreviation: PTA
Chemical Formula:Hydrate form: H3PW12O40.xH2O (x=12 or 29, e.g., )
CAS Number: 12067-99-1
Appearance: Colorless or pale yellow crystalline powder, highly hygroscopic.
Solubility:Highly soluble in water (forming strongly acidic solutions), ethanol, and acetone; insoluble in nonpolar solvents like diethyl ether.
Acidity: Strong protic acid with a very low pH (close to 0 in aqueous solution), dissociating into and polyoxoanions ().
Melting Point:~50°C (hydrates decompose and lose water easily).
Chemical Properties
Strong Acidity and Catalytic Activity
Acts as a solid acid catalyst for esterification, etherification, and isomerization reactions, outperforming traditional mineral acids (e.g., H2SO4) in activity and ease of separation/reuse.
Example: Catalyzes the synthesis of ethyl acetate from acetic acid and ethanol with >95% selectivity.
Redox Properties
Tungsten centers (+6 oxidation state) can be reduced to lower states (e.g., +5), forming colored "heteropoly blue" products, useful in redox reactions or as electron-transfer catalysts.
Complex Formation
Forms insoluble precipitates with organic compounds (e.g., alkaloids, proteins, phenols), applied in biological sample staining (e.g., electron microscopy for cellular structures) or qualitative analysis.
Thermal Stability
Hydrates lose water progressively above 100°C and decompose into WO3 and phosphates above 200°C.
Photocatalytic Performance
Degrades organic pollutants (e.g., dyes, pesticides) under visible light via generating hydroxyl radicals (·OH) for catalytic oxidation.
Applications
Catalysis
Petrochemicals:
Catalyzes olefin hydration and alkylation (e.g., isobutane + butene for high-octane gasoline);
Used in biodiesel production (esterification of fatty acids with methanol), replacing corrosive H2SO4.
Fine Chemistry:
Synthesizes fragrances (e.g., benzyl acetate) and pharmaceutical intermediates (e.g., antibiotic side chains).
Materials Science
Proton Conductors: Doped into polymers (e.g., Nafion) for fuel cell electrolyte membranes, enhancing conductivity at high temperatures.
Nanocomposites: Combined with carbon materials (graphene, carbon nanotubes) to boost photocatalytic or electrochemical properties (e.g., supercapacitor electrodes).
Biomedicine
Staining Agent:
Negative staining for biological macromolecules (viruses, proteins) in transmission electron microscopy (TEM) to enhance contrast;
Observes lipoproteins and glycoproteins under microscopy.
Drug Carrier: Polyoxoanions form complexes with cationic drugs (e.g., anticancer agents) for improved targeting and sustained release.
Analytical Chemistry
Precipitant: Quantifies alkaloids (caffeine, nicotine) or proteins (serum albumin) via gravimetry or colorimetry.
Chromogenic Reagent: Sprayed on TLC plates and heated to form brown spots for organic compound identification.
Environmental Protection
Wastewater Treatment: Photocatalytic degradation of organic pollutants (methyl orange, phenol), especially for non-biodegradable industrial wastewater.
Flue Gas Desulfurization/Denitrification: Adsorbs and converts SO2/NOx to sulfates/nitrates, reducing acid rain pollution.
Safety and Storage
Hazards:
Corrosive: Concentrated solutions severely irritate skin, eyes, and mucous membranes, causing burns;
Environmental Risk: Tungsten is a heavy metal-control wastewater discharge to prevent water pollution.
Safety Measures:
Wear gloves, goggles, and work in a fume hood;
For skin contact, flush with copious water; if ingested, drink milk and seek medical help (do not induce vomiting).
Storage:
Store in a sealed container in a cool, dry place, away from alkalis (e.g., NaOH) and reducing agents to prevent moisture absorption or decomposition.
| Liquid products | Drum of 5kg ,10 kg ,25 kg ,50 kg 200 kg ,250 kg . 1000 kg IBC drum. TANK with 20 tons ,25 tons . |
| Solid products | Bag of 1 kg ,2 kg ,5 kg ,25 kg ,500kg ,1000 kg . Drum of 25 kg and 50 kg. |
Packaging can be customized according to customer requirements.
Qingdao Jinyu Chemical Co., LTD,which is located in Qingdao City, China, with registered capital of RMB 10 million, is a dynamic chemical import and export enterprise with customer demand as its own responsibility. The founder has been engaged in the chemical industry for more than 20 years. With professional technical and marketing personnel, diversified cooperative factories with synthetic technology and efficient logistics management, we provide services to customers all over the world. After years of hard work, we have selected a number of excellent chemical production cooperative enterprises in China. These enterprises have their own advantages in different chemical synthesis fields. They have passed the strict inspection of suppliers by many customers and formed a long-term and stable strategic partnership with customers. With our partners' excellent equipment, well-trained employees and mature technology, we also continue to provide customers with more products.
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