Boric anhydride

CAS 1303-86-2B2O3Catalysis & Inorganic

Boric anhydride (CAS: 1303-86-2, Formula: B2O3, Molar Mass: 69.62 g/mol) is a colourless solid and a key inorganic compound. It is primarily known as boron trioxide and serves as a crucial dehydrating agent and a precursor in various chemical syntheses. Its applications span across the manufacturing of borosilicate glass, optical fibres, and specialised ceramic glazes, highlighting its importance in materials science and industrial processes.

IUPAC: Boron trioxide

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Boric anhydride (B2O3) — chemical structure, CAS 1303-86-2; Chemistry, fine chemical supplied by Tech Serve Solutions

AcidsBoronChemical SynthesisElectronic ChemicalsMaterials Science

01 /Applications

Glass and Ceramics Manufacturing

Boric anhydride is a fundamental component in the production of borosilicate glass, enhancing thermal shock resistance and chemical durability. It is also used in glazes and enamels for ceramics, improving their finish and performance.

Catalysis and Chemical Synthesis

It functions as a catalyst and a dehydrating agent in organic and inorganic syntheses. Boric anhydride is a precursor for the synthesis of other boron compounds, including elemental boron and boron halides.

Electronic Materials

The high purity of boric anhydride makes it suitable for applications in the electronics industry, including the production of dielectric materials and components for microelectronics.

Optical Fibres

It is used in the manufacturing of optical fibres, contributing to their transmission properties and structural integrity.

02 /Properties

Molecular weight	69.62
Empirical formula	B2O3
Assay	99.999% trace metals basis
Density	2.46 g/mL at 25 °C(lit.)
Vapour density	>1 (vs air)
Melting point	450 °C(lit.)

03 /Safety & handling

GHS hazard pictogram: Health hazard (GHS08) — Health hazard

Danger

Hazard statements

H360FD

Precautionary statements

P201Obtain special instructions before use
P308IF exposed or concerned

Protective equipment	dust mask type N95 (US), Eyeshields, Gloves
Water hazard class (WGK, DE)	1
Hazard codes (EU)	T
Risk statements (R)	60-61
Safety statements (S)	53-45

Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.

04 /Identifiers & registry

CAS number

1303-86-2

MDL number

MFCD00011315

05 /Quality & supply

Documentation

Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.

Supply & logistics

Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.

06 /Frequently asked questions

What is Boric anhydride used for?

Boric anhydride is used in the manufacturing of borosilicate glass, optical fibres, ceramic glazes, and as a dehydrating agent and catalyst in chemical synthesis.

What is the CAS number and formula for Boric anhydride?

The CAS number is 1303-86-2 and the empirical formula is B2O3.

What grade and purity does Tech Serve Solutions supply?

Tech Serve Solutions supplies Boric anhydride with an assay of 99.999% trace metals basis. We do not represent this product as USP, BP, or EP grade.

How should Boric anhydride be handled?

Handle with appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. Ensure adequate ventilation and avoid exposure, as it may affect fertility and the unborn child (H360FD).

Is Boric anhydride a controlled substance?

The provided data does not indicate that Boric anhydride is a controlled substance.

How is Boric anhydride packed, shipped, and exported?

Boric anhydride is carefully packed to ensure safe transit and is exported globally by Tech Serve Solutions, adhering to all relevant shipping regulations.