Description

Zinc Borate CAS NO 10361-94-1 is a versatile, multifunctional inorganic flame retardant and smoke suppressant. It is valued for its synergistic effects with other flame retardants, its ability to promote char formation, and its low toxicity profile. This compound is essential for manufacturers in the plastics, rubber, coatings, and textiles industries seeking to enhance the fire safety of their polymer-based products while maintaining material properties.

Application

• Polymer Flame Retardancy: A key component in PVC, polyolefins (PP, PE), elastomers, epoxy resins, and polyamides to meet stringent fire safety standards (UL94, LOI).
• Synergistic Additive: Used in combination with alumina trihydrate (ATH), magnesium hydroxide, or antimony trioxide to improve flame retardant efficiency and reduce overall formulation cost.
• Smoke Suppression: Effectively reduces smoke emission in halogen-containing polymers like PVC during combustion, critical for wire & cable and construction applications.
• Corrosion-Inhibiting Pigment: Incorporated into anti-corrosive primers and coatings for steel and other metals due to its low solubility and inhibitory properties.
• Wood Treatment: Acts as a preservative and fire retardant for wood composites, plywood, and lumber.
• Ceramics & Glazes: Serves as a flux and matting agent in ceramic frits and glazes, modifying thermal and optical properties.

Basic Information

Product Name	Zinc Borate
CAS No.	10361-94-1
Molecular Formula	Typically 2ZnO·3B2O3·3.5H2O (common hydrate)
Molecular Weight	434.66 g/mol (for 2:3:3.5 hydrate)
Synonyms	Zinc borate hydrate; Firebrake ZB; Boron zinc oxide; FBZB; ZB 2335; 2ZnO·3B2O3·3.5H2O; Zinc borate (3.5 hydrate)
EINECS	233-800-1

Quality Control

Our Zinc Borate is manufactured under a strict quality management system. Each batch undergoes rigorous testing to ensure consistent chemical composition, particle size distribution, and performance as a flame retardant. A comprehensive Certificate of Analysis (COA) detailing assay, moisture content, and key impurities 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, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); keep the original container tightly sealed to prevent caking and degradation due to atmospheric moisture.

Specification

Item	Specification
Appearance	White fine powder
Assay (as ZnO·B2O3·xH2O)	≥ 98.5 %
Zinc Oxide (ZnO) Content	37 - 40 %
Boric Oxide (B2O3) Content	45 - 48 %
Loss on Ignition (LOI)	13 - 15 %
Particle Size (D50)	2 - 10 µm
Moisture Content	≤ 0.5 %
Identification (IR)	Conforms

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