(t-butanol) A highly flammable, volatile, colourless liquid which has a camphor-like odor. It is miscible in esters, and aromatic and aliphatic hydrocarbons, and soluble in water. Based on its vapour pressure, tert-butyl alcohol will exist mainly in the vapour phase in the atmosphere. It is most likely to react with the hydroxyl (OH) radical at this state. The reaction products are formaldehyde and acetone. One of MTBE's atmospheric decomposition products is t-butanol.