Iodine Number

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iodine number

[′ī·ə‚dīn ‚nəm·bər]
(analytical chemistry)
A measure of the iodine absorbed in a given time by a chemically unsaturated material, such as a vegetable oil or a rubber; used to measure the unsaturation of a compound or mixture. Also known as iodine value.

Iodine Number


the mass of iodine (in grams) joined to 100 g of organic substance. The iodine number, which describes the double-bond content in an unsaturated compound, is determined during the study of fats and the analysis of fatty acids and the establishment of the content of admixtures that react with iodine in aromatic hydrocarbons. In certain cases, to determine the iodine number the mass of bromine, which combines more readily, is established, and the equivalent mass of iodine is then calculated.

References in periodicals archive ?
Iodine number tests, shown in Table 1, have shown a decrease in the number of double-bonds due to the radical reaction.
Basically, iodine number is a measure of the iodine adsorbed in the pores and, as such, is an indication of the pore volume available in the activated carbon of interest.
With surface attachment, modified blacks turned more acidic and showed lower analytical properties like tinting strength, DBP absorption, iodine number, etc.
Experimental carbon black A has an iodine number of 55 versus a calculated mean iodine number for the blend of 58).
The constant strain energy absorption (G' tan [delta]) accordingly is proportional to DBPA x iodine number (figure 34); and the constant stress energy absorption (tan [delta]/G') is proportional to iodine number/DBPA (figure 35).
T] can be calculated from equation 5 using nitrogen surface area, or any of the commonly used surface area measurements such as CTAB or iodine number.
Low iodine numbers indicate a fat with a high degree of saturation.