Description

Phosphoric Acid, Disodium Salt, Hydrate is a high-purity inorganic phosphate salt widely used as a buffering and sequestering agent. It is valued for its ability to stabilize pH and control metal ions in complex formulations. This compound is essential for manufacturers in the pharmaceutical, food, and industrial water treatment sectors seeking reliable and consistent raw materials.

Application

• Pharmaceutical Buffer: Used in the formulation of injectables, ophthalmic solutions, and oral medications to maintain precise pH levels.
• Food Additive (E339(ii)): Functions as an acidity regulator, emulsifier, and nutrient supplement in processed foods and beverages.
• Water Treatment Agent: Acts as a corrosion inhibitor and scale preventer in boiler water and industrial cooling systems.
• Laboratory Reagent: Serves as a standard buffer component in analytical chemistry and molecular biology applications.
• Detergent Builder: Enhances the cleaning efficiency of detergents by sequestering calcium and magnesium ions in hard water.
• Metal Surface Treatment: Employed in cleaning and phosphatizing solutions for metal preparation prior to painting or coating.

Basic Information

Product Name	Phosphoric Acid, Disodium Salt, Hydrate
CAS No.	10140-65-5
Molecular Formula	Na2HPO4·xH2O
Molecular Weight	141.96 (anhydrous basis)
Synonyms	Disodium Hydrogen Phosphate Hydrate; Disodium Phosphate (DSP); Sodium Phosphate, Dibasic, Hydrate; sec-Sodium Phosphate; E339(ii); Na2HPO4 hydrate; Disodium Orthophosphate; Trona DSP
EINECS	233-448-7

Quality Control

Our Phosphoric Acid, Disodium Salt, Hydrate is manufactured under a strict quality management system. It can be produced to meet various pharmacopeial standards such as USP, EP, BP, or food-grade specifications like FCC. Every batch is supported by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and impurity profiles to ensure compliance with your specific requirements.

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). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (on dried basis)	98.0 - 102.0 %
pH (5% solution)	8.0 - 9.5
Loss on Drying	≤ 2.0 %
Water Insoluble Matter	≤ 0.2 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm

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