Saponification value

From Wikipedia, the free encyclopedia

You have new messages (last change).

The saponification value (or "saponification number") is the number of milligrams of potassium hydroxide or sodium hydroxide required to saponify 1g of fat under the conditions specified. It is a measure of the average molecular weight (or chain length) of all the fatty acids present. Soapmakers usually use the NaOH sap value, while laboratories measure the KOH sap value. To convert one to the other, multiply or divide by 56.11/40 (the ratio of the molecular weights).

Standard methods for analysis are for example: ASTM D 94 (for petroleum) and DIN 51559.

The calculated saponification value is not applicable to fats and oils containing high amounts of unsaponifiable material, free fatty acids (>0.1%), or mono- and diacylglycerols (>0.1%).

[edit] See also


 This chemistry article is a stub. You can help Wikipedia by expanding it.
Retrieved from "http://en.wikipedia.org../../../s/a/p/Saponification_value.html"
In other languages