Boron Nitride, Hexagonal Boron Nitride (h-BN), Cubic Boron Nitride (c-BN), Wurtzite Boron Nitride (w-BN), Boron Mononitride, 10043-11-5

BORON NITRIDE (BN)

PRODUCT IDENTIFICATION INFORMATION

CHEMICAL STRUCTURE

    Hexagonal Boron Nitride (h-BN) Structure

        N           N           N
       / \         / \         / \
      B   B       B   B       B   B
       \ /         \ /         \ /
        N           N           N
       / \         / \         / \
      B   B       B   B       B   B
       \ /         \ /         \ /
        N           N           N

    Hexagonal layered structure (similar to graphite)
    "White Graphite"

Molecular Formula: BN
SMILES: B#N
InChI: InChI=1S/BN/c1-2
Crystal Systems: Hexagonal (h-BN), Cubic (c-BN), Wurtzite (w-BN)

SECTION 1: CHEMICAL IDENTITY AND DEFINITION

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 3: CHEMICAL PROPERTIES AND REACTIVITY

SECTION 4: COMPARISON OF BORON NITRIDE POLYMORPHS

SECTION 5: PRODUCTION METHODS

Method 1: Borax - Urea / Borax - Ammonium Chloride Reaction (Industrial h-BN)

• Reaction (Borax-Urea): Na₂B₄O₇ + 2(NH₂)₂CO → 4BN + Na₂O + 2CO₂ + 2H₂O

• Reaction (Borax-NH₄Cl): Na₂B₄O₇ + 2NH₄Cl → 4BN + 2NaCl + 2H₂O

• Description: Borax reacts with urea or ammonium chloride at high temperatures (800-1000°C) in a nitrogen atmosphere; Produces hexagonal boron nitride; Most common industrial production method for h-BN

Method 2: Boric Oxide - Ammonia / Boron - Ammonia Reaction

• Reaction (B₂O₃ with NH₃): B₂O₃ + 2NH₃ → 2BN + 3H₂O

• Reaction (Boron with NH₃): 2B + 2NH₃ → 2BN + 3H₂

• Description: Boric oxide or elemental boron reacts with ammonia at high temperatures (1200-1500°C) in a nitrogen atmosphere; Produces high-purity hexagonal boron nitride

Method 3: High-Pressure High-Temperature (HPHT) Synthesis (c-BN)

• Process: h-BN + catalyst → c-BN (under high pressure and high temperature)

• Conditions: 4-7 GPa (pressure), 1300-1700°C (temperature)

• Catalysts: Alkali metals, alkaline earth metals, nitrides, Li₃N, Ca₃N₂, Mg₃N₂

• Description: Hexagonal BN is converted to cubic BN under high pressure and high temperature with a catalyst; Produces single crystals or polycrystalline c-BN

Method 4: Chemical Vapor Deposition (CVD) - Thin Films

• Precursors: Boron trichloride (BCl₃) + Ammonia (NH₃)

• Description: Gas phase reaction to deposit thin BN films on substrates; Used for electronics and coating applications

Method 5: Shock Compression (w-BN)

• Description: Explosive shock compression at high pressures (>13 GPa) and high temperatures; Converts h-BN to w-BN; Used for specialized high-pressure applications

SECTION 6: FUNCTIONAL PROPERTIES AND MECHANISM OF ACTION

SECTION 7: MAIN APPLICATION AREAS

SECTION 8: QUALITY SPECIFICATIONS (TECHNICAL GRADE - h-BN POWDER)

c-BN Quality Specifications

SECTION 9: TOXICOLOGICAL PROFILE

SECTION 10: GHS CLASSIFICATION AND LABELING

GHS Classification (Compliant with CLP and UN GHS):

Note: Boron nitride is generally considered non-hazardous. However, the following hazard statements are often included based on dust irritation potential:

Signal Word: WARNING (optional, based on dust irritation)

Hazard Pictograms: GHS07 (optional)

Hazard Statements (H-Codes) - if classified:

Note: In many regions, Boron Nitride is not classified as hazardous under GHS, but fine dust should still be handled with care.

NFPA 704 Hazard Classification:

SECTION 11: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 12: FIRST AID MEASURES

SECTION 13: FIREFIGHTING MEASURES

SECTION 14: STORAGE AND SHELF LIFE

SECTION 15: PACKAGING OPTIONS

SECTION 16: TRANSPORT INFORMATION

SECTION 17: REGULATORY STATUS

SECTION 18: OTHER NAMES AND SYNONYMS

SECTION 19: SUMMARY TABLE

SECTION 20: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• Non-hazardous material but fine dust may cause mechanical irritation to eyes and respiratory tract. Use appropriate dust control measures.

• Non-combustible. Does not burn. Stable at high temperatures.

• Avoid inhalation of fine dust. Use dust extraction systems in handling areas.

• h-BN oxidizes at ~900°C in air (forms boron oxide, B₂O₃). Use inert atmosphere above 900°C for high-temperature applications.

• c-BN oxidizes at ~1300°C in air. More thermally stable than h-BN in air.

• Reacts with strong oxidizing agents, fluorine, chlorine at high temperatures.

• Reacts with molten alkali hydroxides. Avoid contact with strong alkalis at high temperatures.

• Chemically inert to most acids, alkalis, and molten metals.

• Non-wetting to most molten metals. Excellent for metal casting applications.

• Careful attention must be paid to the form: h-BN vs c-BN vs w-BN have different properties and applications. Incorrect selection will lead to failure.

BEST PRACTICE RECOMMENDATIONS:

• Lubricant Applications (h-BN): Use as high-temperature dry lubricant (up to 900°C in air); More stable than graphite in oxidizing atmospheres; Excellent for high-temperature machinery, metal casting molds; Use in anti-seize compounds; Suitable for vacuum and inert atmosphere applications.

• Cutting Tool Applications (c-BN): Use as superabrasive for ferrous metal machining; Preferred over diamond for machining hardened steels, cast irons, superalloys; Does not react with iron at high temperatures; Use in grinding wheels, cutting inserts, honing stones, grinding tools for high-strength alloys.

• Electronics Applications (h-BN): Use as electrical insulator and thermal conductor; 2D layer dielectric for graphene encapsulation; Gate dielectric in nanoelectronics; Excellent heat dissipation; Use as substrate for 2D materials (graphene, MoS₂).

• Ceramics and Metal Casting (h-BN): Use as protective coating for crucibles, molds; Prevents metal adhesion; Excellent release agent; Non-wetting to molten metals; Use in ceramic composite fabrication.

• Handling: Use in well-ventilated areas; Use dust extraction systems; Wear protective gloves, safety goggles, and respiratory protection when handling powder; Avoid dust generation.

• Personal Protective Equipment: Safety goggles, protective clothing (dust-resistant), NIOSH-approved dust mask/respirator, protective gloves (nitrile, neoprene).

• Hygiene: Wash hands thoroughly after handling; Do not eat, drink, or smoke when using; Remove contaminated clothing and wash before reuse.

• Storage: Store in tightly closed, properly labeled containers in dry conditions; Keep away from strong oxidizing agents and moisture; Moisture-proof containers recommended.

• Spill Response: Avoid dust generation; Use dust extraction systems; Vacuum or wet-sweep; Place in closed containers for disposal; Do not use dry sweeping methods that generate dust.

• Disposal: Dispose of in accordance with local, regional, and national regulations; BN is considered non-hazardous waste; Recycle where possible; Do not discharge into sewers or water sources.

FORM-SPECIFIC RECOMMENDATIONS:

Hexagonal Boron Nitride (h-BN):

• Best for lubrication, coatings, electrical insulation, thermal management

• Preferred over graphite in oxidizing atmospheres (graphite oxidizes)

• Preferred over graphite for electrical insulation (graphite is conductive)

• Use in ceramics, metal casting, cosmetics, electronics

Cubic Boron Nitride (c-BN):

• Best for abrasives and cutting tools (ferrous metal machining)

• Preferred over diamond for machining steel and iron (diamond reacts with iron at high temperatures)

• Second hardest material after diamond

• Use in cutting inserts, grinding wheels, industrial abrasives

Wurtzite Boron Nitride (w-BN):

• Specialized high-pressure applications

• Hardness comparable to c-BN

• Use in specific abrasive and high-performance applications

LEGAL DISCLAIMER:

The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, this document does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing suitability for their own applications. For complete safety, storage, handling, transportation, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.

Documents

•  
• Betakim E-Z Coat II Bor Nitrür_TR.pdf
•