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TAN Test Kits to Measure Total Acid Number

This method determines the acidic constituents in a lubricating oil to show relative changes occurring in an oil in oxidizing conditions. The rising Total Acid Number is usually indicative of advancing oxidation which leads to oil deterioration and chemical changes in the oil molecule.


TAN expressed in milligrams of Potassium Hydroxide (KOH) required to neutralize on weight (gram) of lubricant. 

TAN test kit is excellent in measuring the chemical changes in lubricants which are caused by oil oxidation. The higher TAN result shows, the rising in oil oxidation occurs in lubricants.