Description

Sodium Pyroantimonate is an inorganic antimony compound with the chemical formula Na₂H₂Sb₂O₇·H₂O. It serves as a critical source of antimony in a highly stable and processable form for various industrial applications. This product is essential for manufacturers in the glass, ceramics, and flame-retardant polymer industries seeking consistent quality and reliable supply. Its controlled reactivity makes it a preferred material for achieving specific optical and chemical properties in finished goods.

Application

• As an opacifying agent and fining agent in the production of specialty glass and ceramics.
• As a flame retardant synergist in plastics, textiles, and coatings, often used in conjunction with halogenated compounds.
• As a precursor in the synthesis of other antimony-based chemicals and catalysts.
• In the manufacturing of pigments and as a mordant in dyeing processes.
• For the clarification of lead-acid battery electrolyte solutions.
• In the production of certain types of electronic ceramics and varistors.

Basic Information

Product Name	Sodium Pyroantimonate
CAS No.	31589-39-6
Molecular Formula	Na₂H₂Sb₂O₇·H₂O
Molecular Weight	443.48 g/mol (for monohydrate)
Synonyms	Antimonic acid (H4Sb2O7), disodium salt; Disodium dihydrogen diantimony heptaoxide; Sodium antimonate(V); Pyroantimonate de sodium; Sodium hexahydroxoantimonate; Antimony sodium oxide; Sodium antimony oxide
EINECS	250-735-1

Quality Control

Our Sodium Pyroantimonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications for industrial use. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided with every shipment to guarantee traceability and batch-to-batch consistency.

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 affect product performance.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as Sb₂O₅)	≥ 85.0 %
Na₂O Content	Contact for details
Loss on Drying	≤ 2.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 5 ppm
Chloride (Cl)	≤ 0.1 %
Sulfate (SO₄)	≤ 0.1 %
Particle Size	Contact for details

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