A measure of the degree of unsaturation of a fat or oil. The iodine number is the number of grams of iodine absorbed by 100 grams of a fat or oil. A drying oil will have a high iodine number, such as 120, thus indicating a high degree of unsaturation. Materials with low iodine numbers, such as a wax or nondrying oil, will not oxidize rapidly.
Synonyms and Related Terms
Jodzahl (Deut.); iodine value
Sources Checked for Data in Record
- Richard S. Lewis, Hawley's Condensed Chemical Dictionary, Van Nostrand Reinhold, New York, 10th ed., 1993
- R. J. Gettens, G.L. Stout, Painting Materials, A Short Encyclopaedia, Dover Publications, New York, 1966
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)