Description

Diphosphoric Acid, Ammonium Salt is an important inorganic ammonium phosphate compound, widely recognized for its utility as a flame retardant and a source of phosphorus and nitrogen. This product is valued in industrial applications for its ability to enhance fire resistance in materials while also serving as a nutrient or catalyst precursor. Key industries that utilize this chemical include polymer manufacturing, specialty fertilizers, and the production of fire-safe textiles and construction materials.

Application

• As a flame retardant synergist in polymers, plastics, and textiles.
• As a phosphorus and nitrogen source in the formulation of specialty fertilizers and nutrient solutions.
• In the production of fire-resistant coatings and intumescent paints for construction materials.
• As a precursor or intermediate in the synthesis of other phosphate-based chemicals and catalysts.
• In laboratory research and development for material science and agricultural chemistry.
• Potential use in wood treatment formulations to impart fire retardancy.

Basic Information

Product Name	Diphosphoric Acid, Ammonium Salt
CAS No.	22690-73-9
Molecular Formula	H9N2O7P2 or (NH4)2H2P2O7
Molecular Weight	246.03 g/mol
Synonyms	Ammonium Dihydrogen Diphosphate; Diammonium Diphosphate; Diammonium Pyrophosphate; Ammonium Pyrophosphate, Acidic; Diphosphoric Acid, Diammonium Salt; (NH4)2H2P2O7; Pyrophosphoric Acid, Diammonium Salt
EINECS	245-204-8

Quality Control

Our Diphosphoric Acid, Ammonium Salt is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, composition, and physical properties. Certificates of Analysis (COA) documenting key parameters such as assay, moisture content, and impurity levels are available upon request 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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to caking or degradation.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as (NH4)2H2P2O7)	≥ 98.0 %
pH (5% solution)	3.5 - 5.0
Loss on Drying	≤ 1.0 %
Water Insoluble Matter	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm

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