Hexamethyldisilazane (HMDS)
CAS # 999-97-3
Hexamethyldisilazane (HMDS) is an organosilicon compound widely used as a silylation agent, adhesion promoter, and surface modifier in semiconductor manufacturing, pharmaceuticals, and specialty chemical applications.
Description:
Hexamethyldisilazane (HMDS) is a highly effective organosilicon compound widely used as a silylation agent, adhesion promoter, and surface modifier in semiconductor processing, pharmaceuticals, and specialty chemical synthesis. Known for its ability to render surfaces hydrophobic and enhance coating adhesion, HMDS is a critical material in applications requiring precision, cleanliness, and consistency. Its controlled reactivity and high purity make it an essential component in advanced manufacturing environments.
General Properties:
Molecular Formula: C₆H₁₉NSi₂
Appearance: Clear, colorless liquid
Boiling Point: ~125–126 °C
Solubility: Reacts with water; soluble in organic solvents
Applications:
Semiconductor & Electronics Manufacturing
Widely used as an adhesion promoter in photolithography, improving bonding between photoresist layers and silicon wafers by creating hydrophobic surfaces.
Pharmaceutical & Fine Chemical Synthesis
Acts as a silylation agent to protect functional groups and enhance reaction selectivity in API and intermediate production.
Surface Modification & Coatings
Used to treat glass, silica, and metal surfaces to improve water repellency, coating adhesion, and durability.
Laboratory & Analytical Chemistry
Employed in sample preparation and derivatization processes to improve volatility and analytical performance.
Specialty Chemical Formulations
Used in silicone chemistry and advanced material development where controlled surface properties are required.
Advantages:
Effective Surface Hydrophobization: Transforms hydrophilic surfaces into water-repellent surfaces, improving adhesion and performance.
High-Purity Performance: Suitable for sensitive applications such as semiconductor processing and pharmaceutical synthesis.
Versatile Reactivity: Supports a wide range of silylation and surface modification reactions.
Improves Coating & Adhesion Performance: Enhances bonding strength and consistency in thin-film and coating applications.
Safety & Handling:
Hexamethyldisilazane is a flammable and moisture-sensitive chemical and must be handled using appropriate precautions.
Flammable liquid and vapor
Reacts with moisture to release ammonia
Vapors may cause irritation to eyes, skin, and respiratory system
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