Description

Sodium Phosphate, Dibasic, Heptahydrate is a high-purity inorganic salt widely used as a buffering agent, emulsifier, and nutrient source. Its consistent quality and reliable performance make it a critical raw material for ensuring product stability and process control in sensitive manufacturing environments. This compound is essential for industries requiring precise pH regulation and mineral supplementation, such as pharmaceuticals, food production, and water treatment.

Application

• Pharmaceutical Buffer & Excipient: Used in tablet and capsule formulations, intravenous solutions, and oral suspensions to maintain pH stability.
• Food Additive (FCC Grade): Functions as an emulsifying agent, pH adjuster, and mineral nutrient in processed foods, dairy products, and beverages.
• Water Treatment Chemical: Acts as a corrosion inhibitor and scale control agent in boiler water and industrial cooling systems.
• Laboratory Reagent: Serves as a standard buffer component in analytical chemistry, molecular biology, and biochemical research.
• Nutrient Supplement: Provides a bioavailable source of phosphorus in animal feed and fertilizer blends.
• Industrial Processing: Used in metal surface treatment, textile processing, and ceramic manufacturing.

Basic Information

Product Name	Sodium Phosphate, Dibasic, Heptahydrate
CAS No.	7782-85-6
Molecular Formula	Na2HPO4·7H2O
Molecular Weight	268.07 g/mol
Synonyms	Disodium hydrogen phosphate heptahydrate; Disodium phosphate heptahydrate; DSP-7; Sodium hydrogen phosphate heptahydrate; sec-Sodium phosphate heptahydrate; Na2HPO4.7H2O; E339(ii)
EINECS	231-448-7

Quality Control

Our Sodium Phosphate, Dibasic, Heptahydrate is manufactured under a strict quality management system. It is available in various grades, including Technical, Food (FCC), and Pharmaceutical (USP/EP) specifications. Each batch undergoes rigorous analytical testing to ensure compliance with the relevant purity and safety standards. Certificates of Analysis (COA) documenting identity, assay, impurity profiles, and other critical parameters are available upon request.

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 original packaging or a suitable moisture-proof container to prevent caking and degradation.

Specification

Item	Specification
Appearance	White or colorless crystalline powder
Identification (IR)	Conforms
Assay (Na2HPO4·7H2O)	98.0 - 102.0 %
pH (5% solution)	8.0 - 9.5
Loss on Drying	40.0 - 50.0 %
Insoluble Matter	≤ 0.2 %
Chloride (Cl)	≤ 0.005 %
Sulfate (SO4)	≤ 0.02 %
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.