This organic chemical, also known as Triphenylmethylphosphonium bromide, presents as a white crystalline powder. It is known to be soluble in Methanol. Keep container tightly closed and store under inert gas in a cool and dark place at ambient temperatures. This substance is hygroscopic and should be protected from moisture. (Methyl)triphenylphosphonium Bromide is Incompatible with strong oxidizing agents. It is harmful if swallowed, in contact with skin or if inhaled. This chemical also causes skin irritation and serious eye irritation.