Description

Ammonium Phosphomolybdate is an inorganic coordination compound known for its distinctive yellow color and utility as a key analytical reagent. Its primary commercial value lies in its role as a highly selective precipitating agent for the quantitative determination of phosphate and silicate ions. This product is essential for laboratories and industrial facilities engaged in water quality analysis, fertilizer testing, and materials science research. It is supplied as a fine, crystalline powder under the identifier CAS NO 12704-86-8.

Application

• Quantitative Phosphate Analysis: Used as a standard reagent in spectrophotometric and gravimetric methods for determining orthophosphate concentration in water, wastewater, and environmental samples.
• Silicate Determination: Employed in analytical chemistry for the colorimetric assay of soluble silica and silicate content in various industrial process streams and geological samples.
• Catalyst Research: Serves as a precursor or active component in the study of heterogeneous catalysts for oxidation reactions and acid-catalyzed processes.
• Material Science: Acts as a starting material for the synthesis of molybdenum-containing thin films, ceramics, and other advanced inorganic materials.
• Laboratory Reagent: A standard chemical for educational and quality control laboratories performing classical inorganic qualitative and quantitative analysis.

Basic Information

Product Name	Ammonium Phosphomolybdate
CAS No.	12704-86-8
Molecular Formula	(NH4)3PMo12O40·xH2O
Molecular Weight	~1876.34 (Anhydrous basis)
Synonyms	Ammonium Molybdophosphate; Ammonium Phospho-12-Molybdate; Molybdophosphoric Acid Ammonium Salt; Phosphomolybdic Acid Ammonium Salt; AMP; Ammonium 12-Molybdophosphate; Ammonium Polymolybdate Phosphate; Ammonium Phosphomolybdate Hydrate
EINECS	235-795-8

Quality Control

Our Ammonium Phosphomolybdate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for chemical composition and performance as an analytical reagent. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical applications.

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 degradation. Keep away from incompatible materials.

Specification

Item	Specification
Appearance	Bright yellow crystalline powder
Identification (IR)	Conforms to standard
Assay (as (NH4)3PMo12O40)	≥ 98.0 %
Solubility (in Water)	Slightly soluble, forms a clear yellow solution
Loss on Drying	≤ 2.0 %
Chloride (Cl)	≤ 0.01 %
Sulfate (SO4)	≤ 0.02 %
Heavy Metals (as Pb)	≤ 0.002 %

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