Description

Sodium Hydrogen Phosphite 2.5 Water is a specific hydrate form of sodium phosphite, a key inorganic chemical intermediate. This compound is valued for its role as a versatile reducing agent and a stable source of phosphite ions in various industrial synthesis and treatment processes. It is essential for manufacturers in sectors such as water treatment, chemical synthesis, and agriculture, where controlled phosphorus chemistry is required.

Application

• Water Treatment: Acts as a scale and corrosion inhibitor in industrial cooling and boiler water systems.
• Chemical Synthesis: Serves as a reducing agent and a phosphorus source in the production of specialty chemicals, including phosphonates and flame retardants.
• Agriculture: Used in the formulation of certain fertilizers and fungicides, providing a source of phosphite nutrient.
• Polymer Industry: Functions as a stabilizer and antioxidant in the production of specific polymers and plastics.
• Metal Surface Treatment: Employed in electroplating and metal finishing baths for surface conditioning and protection.
• Laboratory & Research: Utilized as a reagent in analytical chemistry and research applications involving phosphorus chemistry.

Basic Information

Product Name	Sodium Hydrogen Phosphite 2.5 Water
CAS No.	13472-37-2
Molecular Formula	Na2HPO3 · 2.5H2O
Molecular Weight	182.98 g/mol (anhydrous basis)
Synonyms	Sodium Phosphite, Pentahydrate (common misnomer); Disodium Phosphite; Disodium Hydrogen Phosphite; Sodium Phosphonate; Phosphorous acid, disodium salt, hydrate; Na2HPO3; Disodium phosphite 2.5-hydrate
EINECS	Contact for details

Quality Control

Our Sodium Hydrogen Phosphite 2.5 Water is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. A Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and compliance with your 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 product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as Na2HPO3·2.5H2O)	≥ 98.0 %
pH (5% solution)	8.0 - 10.0
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.