Description

Boric Acid (HBO2), Zinc Salt, Dihydrate is a specialized inorganic zinc borate compound with the CAS registry number 27043-84-1. This material is valued for its synergistic properties derived from both zinc and boron, offering flame retardancy and antifungal activity. It serves as a critical functional additive for manufacturers in the polymer, ceramics, and coatings industries seeking to enhance material performance and safety.

Application

• Flame Retardant & Smoke Suppressant: A key additive in plastics (PVC, polyolefins), rubber, and textiles to improve fire resistance and reduce smoke emission.
• Ceramic Glaze & Frit Component: Used to modify thermal expansion, lower melting points, and improve glaze durability and finish.
• Wood Preservative & Fungicide: Provides protection against fungal decay and insects in treated lumber and composite wood products.
• Corrosion Inhibiting Pigment: Incorporated into primer and anti-corrosive coatings for metals, particularly in marine and industrial environments.
• Lubricant & Stabilizer Additive: Functions in specialty greases and stabilizer systems for polymers like PVC.
• Electronic Material Precursor: Employed in the synthesis of certain electronic ceramics and glass formulations.

Basic Information

Product Name	Boric Acid (HBO2), Zinc Salt, Dihydrate
CAS No.	27043-84-1
Molecular Formula	B2H4O6Zn or Zn(BO2)2 · 2H2O
Molecular Weight	183.05 g/mol
Synonyms	Zinc Borate Dihydrate; Zinc Metaborate Dihydrate; Zinc Diborate Dihydrate; Firebrake ZB; ZB-2335; 2ZnO·3B2O3·3.5H2O (common commercial form); Boron Zinc Oxide Hydrate
EINECS	Contact for details

Quality Control

Our Boric Acid (HBO2), Zinc Salt, Dihydrate is produced under a strict quality management system. Each batch undergoes rigorous testing for chemical composition, physical properties, and purity to ensure it meets precise customer and industry specifications. Certificates of Analysis (COA) documenting key parameters such as zinc oxide content, boron oxide content, and loss on ignition are available upon request.

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 material is hygroscopic (moisture-sensitive); keep the original container tightly sealed to prevent caking or degradation due to atmospheric moisture. Separate from strong acids.

Specification

Item	Specification
Appearance	White fine powder
Identification (IR)	Conforms
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)	< 10 µm
Moisture Content	< 1.0 %
Heavy Metals (as Pb)	< 20 ppm

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