GP-193 Hexamethyldisilazane

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GP-193 is a silazane compound used as a blocking agent to protect functional groups containing active hydrogens such as hydroxyl or amino groups. Deprotection is accomplished with the addition of mild acids or bases.

Typical Properties
Clear, Colorless Liquid
Molecular Weight (Calculated)
161.39 amu
Boiling Point
126°C (259°F)
Flash Point (P.M.C.C.)
13°C (55°F)
Specific Gravity
Weight/Gallon @ 25°C
6.4 lbs

Processing and Safety Guidelines

GP-193 should be handled with care. Use proper precautions for handling Flammable Materials. GP-193 liberates ammonia on exposure to moisture. Consult Safety Data Sheet for additional details.


GP-193 is supplied in 5-gallon (30 lbs.) pails and 55-gallon (341 lbs.) drums. GP-193 is Flammable. Keep away from open flames or welding torches, even when empty. Moisture Sensitive - maintain under nitrogen.