Description

Sodiumphosphatedibasicheptahydrateacs CAS NO 7782-58-6 is a high-purity, crystalline inorganic salt meeting ACS reagent grade standards. This compound serves as a critical buffer and sequestering agent in numerous analytical and industrial processes, valued for its consistent quality and reliable performance. It is essential for manufacturers and laboratories in the pharmaceutical, food & beverage, and water treatment sectors requiring precise pH control and reagent-grade materials.

Application

• Analytical Chemistry & Laboratory Reagent: Used as a primary standard buffer solution for pH meter calibration and in various analytical procedures.
• Pharmaceutical Manufacturing: Functions as a buffering agent, pH adjuster, and sequestrant in the formulation of drugs and injectables.
• Food Additive (FCC Grade): Employed as an emulsifier, pH control agent, and nutrient source in food processing and beverage production.
• Water Treatment: Acts as a corrosion inhibitor and scale control agent in boiler water and industrial cooling systems.
• Industrial Processes: Serves in metal surface treatment, textile processing, and ceramic manufacturing.
• Detergent & Cleaning Formulations: Used as a builder to enhance cleaning efficiency by softening water and sequestering metal ions.

Basic Information

Product Name	Sodiumphosphatedibasicheptahydrateacs CAS NO 7782-58-6
CAS No.	7782-85-6
Molecular Formula	Na₂HPO₄·7H₂O
Molecular Weight	268.07 g/mol
Synonyms	Disodium hydrogen phosphate heptahydrate; Sodium phosphate dibasic heptahydrate; Disodium phosphate heptahydrate; DSP-7H₂O; sec-Sodium phosphate heptahydrate; Sodium hydrogen phosphate heptahydrate; Na₂HPO₄·7H₂O; ACS reagent grade disodium phosphate
EINECS	231-448-7 (anhydrous basis)

Quality Control

Our ACS reagent grade Sodium Phosphate Dibasic Heptahydrate is manufactured under strict quality management systems. Each batch is tested to ensure it meets or exceeds the stringent purity and compositional criteria outlined in the American Chemical Society (ACS) Reagent Specifications. A comprehensive Certificate of Analysis (COA) detailing assay, impurity limits, and physical specifications is provided with every shipment to guarantee traceability and compliance for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at a controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after initial use to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White or colorless crystals
Identification (IR)	Conforms
Assay (Na₂HPO₄·7H₂O)	98.0 - 102.0 %
pH (5% solution, 25°C)	8.7 - 9.3
Insoluble Matter	≤ 0.01 %
Loss on Drying	40 - 50 %
Chloride (Cl)	≤ 0.001 %
Sulfate (SO₄)	≤ 0.005 %
Heavy Metals (as Pb)	≤ 5 ppm

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