Description

Sodium Phosphite is an important inorganic chemical compound widely used as a reducing agent and stabilizer in various industrial processes. Its unique chemical properties make it a critical component for preventing oxidation and degradation in sensitive formulations. This product is essential for manufacturers in the water treatment, polymer, and agrochemical industries seeking reliable and consistent performance.

Application

• Water Treatment: Acts as a powerful reducing agent and oxygen scavenger in boiler water and cooling systems to prevent corrosion and scale formation.
• Polymer & Plastics Industry: Serves as a stabilizer and antioxidant in the production of polymers, including polyamides and polyesters, to enhance thermal stability.
• Agrochemicals: Used in the synthesis of certain pesticides and herbicides, and as a nutrient source in specialized fertilizer formulations.
• Chemical Synthesis: Functions as a reducing agent in organic synthesis and in the production of other phosphorous-containing compounds.
• Metal Treatment & Electroplating: Employed in surface treatment baths and electroplating solutions for its reducing and stabilizing properties.
• Laboratory & Research: Utilized as a reagent in analytical chemistry and various research applications.

Basic Information

Product Name	Sodium Phosphite
CAS No.	22620-95-7
Molecular Formula	Na2HPO3 • xH2O
Molecular Weight	Anhydrous: 125.96 g/mol
Synonyms	Disodium hydrogen phosphite; Disodium phosphite; Phosphorous acid, disodium salt; Sodium hydrogen phosphite; Sodium phosphonate; Disodium phosphonate; Na2HPO3; Antiox L
EINECS	245-090-5

Quality Control

Our Sodium Phosphite is manufactured under a strict quality management system to ensure batch-to-batch consistency and high purity. Each lot is analyzed against stringent in-house specifications, which typically include assay, identification, and impurity profile checks. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical 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). This material is hygroscopic (moisture-sensitive); the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can lead to caking and degradation.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as Na2HPO3)	≥ 98.0 %
pH (5% solution)	8.0 - 10.0
Water Insoluble Matter	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm
Loss on Drying	≤ 2.0 %

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