This silane presents as a colorless liquid with a unique, unpleasant stench. It is known to be soluble in water. Store in a tightly closed container in a cool, dark place and under inert gas. For best results, also protect from moisture. (3-Mercaptopropyl)trimethoxysilane is incompatible with oxidizing agents. This chemical is harmful if swallowed, causes eye irritation, and is toxic to aquatic life with long lasting effects.