Hexamethyldisilazane 99%

Bistrimethylsilylamine (also known as hexamethyldisilazane, or HMDS) is an organosilicon compound. The molecule is a derivative of ammonia with trimethylsilyl groups in place of two hydrogen atoms. This colorless liquid is a reagent and a precursor to bases that are popular in organic synthesis and organometallic chemistry. In photolithography, HMDS is often used as an adhesion promoter for photoresist. Best results are obtained by applying HMDS from the gas phase on heated substrates. In electron microscopy, HMDS can be used as an alternative to critical point drying during sample preparation. In pyrolysis-gas chromatography-mass spectrometry, HMDS is added to the analyte to create sylilated diagnostic products during pyrolysis, in order to enhance detectability of compounds with polar functional groups.

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