Description

Ammonium Phosphotungstate, Trihydrate is an inorganic salt complex of tungsten and phosphorus with ammonium cations. This compound is valued as a versatile catalyst and precursor material in advanced chemical synthesis and materials science. It is primarily utilized by industries involved in heterogeneous catalysis, specialty chemical manufacturing, and the development of functional inorganic materials. Its properties make it suitable for applications requiring acidic or oxidative catalytic activity.

Application

• Heterogeneous Catalysis: Acts as a solid acid catalyst for organic synthesis reactions, including esterification, alkylation, and condensation.
• Precursor for Tungsten Compounds: Serves as a starting material for the synthesis of other tungsten-based catalysts and phosphotungstic acid derivatives.
• Analytical Chemistry: Used as a reagent for the precipitation and gravimetric determination of alkaloids and other organic bases.
• Material Science: Employed in the preparation of anti-corrosive coatings, functional thin films, and modified electrode surfaces.
• Photocatalysis Research: Investigated for use in photocatalytic degradation processes under visible light.
• Ion Exchange: Utilized in selective ion exchange processes due to its unique structural properties.

Basic Information

Product Name	Ammonium Phosphotungstate, Trihydrate
CAS No.	1311-90-6
Molecular Formula	(NH4)3PW12O40·3H2O
Molecular Weight	~2980.17 g/mol (Trihydrate)
Synonyms	Ammonium 12-Tungstophosphate; Ammonium Phosphotungstate Hydrate; Ammonium Tungstophosphate; Triammonium Phosphododecatungstate; Phosphotungstic Acid Ammonium Salt; Keggin-type Ammonium Salt; APT; PW12 Ammonium Salt
EINECS	215-186-5

Quality Control

Our Ammonium Phosphotungstate, Trihydrate is manufactured under controlled conditions to ensure batch-to-batch consistency and high chemical purity. Quality is verified through a suite of analytical techniques including X-ray diffraction (XRD), infrared spectroscopy (IR), and thermogravimetric analysis (TGA). A Certificate of Analysis (COA) detailing purity, assay, and physical characteristics is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and must be kept in a dry environment to prevent caking and hydrolysis. Keep away from incompatible materials such as strong bases.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to standard
Assay (as PW12O403-)	≥ 98.0 %
Water Content (Loss on Drying)	3.0 - 4.5 %
Solubility (in Water)	Clear solution
Heavy Metals (as Pb)	≤ 20 ppm
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.01 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.