What does TAN stand for?

Total Acid Number

This definition appears very rarely and is found in the following Acronym Finder categories:

Science, medicine, engineering, etc.

Other Resources:

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Samples in periodicals archive:

Furthermore the source said that the new fields produce less acidic crude but cautioned that it is too soon to say what the total acid number (TAN) would be.

Sudan's production of Dar blend crude to reach 300k bpd

Additional laboratory tests indicated that changes in conductivity closely matched variations in a chemical signature known as total acid number, a sign of oil quality.

Nanotubes signal when engine oil needs changing

The Total Acid Number, the Cold Soak Filterability particulate count and KF Water concentration are the lowest values ever reported for a B100 sample tested at CytoCulture.

Sirona Fuels' B100 Jatropha Oil Among Highest Quality Ever Tested