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Trimethyl orthoformate is the simplest orthoester. It is a reagent used in organic synthesis for the introduction of a protecting group for aldehydes. The product of reaction of an aldehyde with trimethyl orthoformate is an acetal.
T 2235 (OTTO) Trimethyl orthoformate, 98% Cas 149-73-5 - used as dehydrating agent in the preparation of surface-modified colloidal silica nanoparticles.