Description

Orthoboric Acid, Sodium Salt (CAS NO 13840-56-7) is a versatile inorganic salt widely used as a source of boron and sodium in various industrial processes. Its primary value lies in its role as a stable, water-soluble compound for applications requiring controlled boron release. This product is essential for manufacturers in the glass, ceramics, agriculture, and flame retardant industries seeking a reliable and consistent raw material.

Application

• Glass & Ceramics Manufacturing: Acts as a fluxing agent to lower melting temperatures and improve the thermal and chemical durability of borosilicate glass, fiberglass, and ceramic glazes.
• Flame Retardants & Wood Treatment: Used as a component in fire-retardant formulations for textiles, wood products, and plastics due to its ability to promote char formation and suppress flames.
• Agriculture & Horticulture: Serves as a source of the essential micronutrient boron in fertilizers and soil amendments to correct boron deficiencies in crops.
• Metallurgy & Metalworking: Employed in welding fluxes, brazing compounds, and as a component in protective slag formations during metal refining.
• Detergents & Cleaning Agents: Functions as a buffering agent and water softener in certain industrial and institutional cleaning formulations.
• Chemical Synthesis: Utilized as a precursor or reagent in the production of other boron-containing specialty chemicals.

Basic Information

Product Name	Orthoboric Acid, Sodium Salt
CAS No.	13840-56-7
Molecular Formula	NaBO2 or Na2B4O7 (common hydrated forms)
Molecular Weight	65.80 g/mol (for NaBO2)
Synonyms	Sodium Metaborate; Sodium Borate; Anhydrous Sodium Metaborate; Boron Sodium Oxide; Boric Acid (H3BO3), Sodium Salt; Sodium Tetraborate; Disodium Tetraborate; Borax, Anhydrous; Sodium Biborate
EINECS	237-560-2

Quality Control

Our Orthoboric Acid, Sodium Salt is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise chemical and physical specifications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are provided to guarantee supply reliability and batch-to-batch consistency for your critical processes.

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 to prevent absorption of atmospheric moisture, which can lead to caking or clumping.

Specification

Item	Specification
Appearance	White crystalline powder or granules
Identification (IR)	Conforms
Assay (as NaBO2)	≥ 98.0 %
pH (10% solution)	10.0 - 11.5
Loss on Drying	≤ 2.0 %
Water Insoluble Matter	≤ 0.1 %
Heavy Metals (as Pb)	≤ 10 ppm

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