Description

Orthoboric Acid, Calcium Salt CAS NO 13840-55-6 is an inorganic calcium salt derived from boric acid, offering a stable source of both calcium and boron. This compound is valued for its role as a functional additive and intermediate in various industrial processes where controlled release or synergistic effects of these elements are required. Key industries that utilize this material include ceramics and glass manufacturing, flame retardant formulations, and specialty chemical synthesis.

Application

• Ceramics and Glass Manufacturing: Acts as a fluxing agent and stabilizer, modifying melting points and improving the thermal and chemical durability of final products.
• Flame Retardant Systems: Used as a synergistic component in halogen-free flame retardant formulations for plastics, textiles, and wood products.
• Chemical Synthesis: Serves as a precursor or intermediate in the production of other boron and calcium-based specialty chemicals.
• Metallurgy: Employed in fluxes and slag conditioners for metal refining and welding applications.
• Agriculture (Specialty Use): Can be formulated into micronutrient fertilizers providing a combined source of calcium and boron for specific crop needs, subject to regulatory approval.
• Adhesives and Sealants: Functions as a cross-linking agent or property modifier to enhance thermal stability.

Basic Information

Product Name	Orthoboric Acid, Calcium Salt
CAS No.	13840-55-6
Molecular Formula	CaB2O4 • xH2O
Molecular Weight	125.70 (Anhydrous)
Synonyms	Calcium Borate; Calcium Diborate; Boric Acid (H2B4O7), Calcium Salt; Calcium Tetraborate; Calcium Metaborate (common misnomer); Colemantie (mineral form); Calcium Boron Oxide
EINECS	237-560-2

Quality Control

Our Orthoboric Acid, Calcium Salt is produced and tested under a rigorous quality management system. Each batch is analyzed to ensure it meets precise chemical and physical specifications relevant to its intended industrial grade. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee consistency and support your quality assurance protocols.

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 container tightly sealed when not in use to prevent caking or degradation due to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as CaB2O4)	≥ 95.0%
Calcium (Ca) Content	Contact for details
Boron (B) Content	Contact for details
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Particle Size (Typical)	Contact for details

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