Hi-Tan Index

The third (and final) image of a series of three market centre posters. This concept contains a molecular diagram of naphthenic acid molecule, the quantities and qualities of which are generally used to determine the Total Acid Number (or “TAN”) of crude oils.The colour red was chosen to indicate the acidic (i.e., ”fiery” and caustic) quality of this compound which is extracted and sold for use in a variety of industrial applications (e.g., air wing deicing, wood preservatives, synthetic detergents, solvents, lubricants, and fuel additives).