Description

Zinc Borate CAS NO 12767-90-7 is an inorganic, white crystalline compound widely recognized for its synergistic flame retardant and smoke suppressant properties. Its primary value lies in its ability to replace antimony trioxide in many halogen-containing systems, offering a more cost-effective and environmentally favorable solution. This multifunctional additive is essential for manufacturers in the plastics, rubber, coatings, and textiles industries seeking to enhance the fire safety of their products.

Application

• As a synergistic flame retardant and smoke suppressant in PVC, polyolefins, engineering plastics, and elastomers.
• In halogen-free flame retardant systems for wire and cable insulation and sheathing compounds.
• As a component in intumescent coatings and paints for steel structures and wood.
• In textiles and fabrics to impart flame-retardant characteristics.
• As a corrosion inhibitor and preservative in various coating formulations.
• In ceramic glazes and glasses to modify thermal and chemical resistance.
• For the production of other boron-based specialty chemicals.

Basic Information

Product Name	Zinc Borate
CAS No.	12767-90-7
Molecular Formula	Typically represented as xZnO·yB2O3·zH2O (Common grades: 2ZnO·3B2O3·3.5H2O or 4ZnO·B2O3·H2O)
Molecular Weight	Varies by hydration state (e.g., ~434.7 g/mol for 2ZnO·3B2O3·3.5H2O)
Synonyms	Zinc borate hydrate; Firebrake ZB; Boron zinc oxide; Zinc borate (3:2); FBZB; Boric acid, zinc salt; 2ZnO·3B2O3; Zinc tetraborate
EINECS	235-804-2

Quality Control

Our Zinc Borate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and performance. We provide comprehensive Certificates of Analysis (COA) for every shipment, detailing key parameters such as zinc oxide content, boron oxide content, and loss on ignition. Our quality protocols are designed to meet the specifications required for demanding industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area. Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	White fine powder
Zinc Oxide (ZnO) Content	37.0 - 40.0 %
Boron Oxide (B2O3) Content	45.0 - 48.0 %
Loss on Ignition (LOI)	13.0 - 15.5 %
Particle Size (D50)	2 - 10 µm
Specific Gravity	2.8
Dehydration Temperature	> 290 °C

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