Amine value


In organic chemistry, amine value is a measure of the nitrogen content of an organic molecule. Specifically, it is usually used to measure the amine content of amine functional compounds. It may be defined as the number of milligrams of potassium hydroxide needed to neutralize all amine groups in 1g sample

List of ASTM methods

There are a number of ASTM analytical test methods to determine amine value. A number of states in the United States have adopted their own test methods but they are based on ASTM methods. Although there are similarities with the method it is not the same as an acid value.

First principles

The amine value is useful in helping determine the correct stoichiometry of a two component amine cure epoxy resin system.
It is the number of Nitrogens x 56.1 x 1000 divided by molecular mass of the amine functional compound. So using Tetraethylenepentamine as an example:
Mwt = 189, number of nitrogen atoms = 5
So 5 x 1000 x 56.1/189 = 1484. So the Amine Value of TEPA = 1484

Other amines

All numbers are in units of mg KOH/g.