PA is a partially crystalline plastic which natural colour is milk-white. Even amorphous and transparent types are manufactured. Good stability, viscosity and good storage properties characterise PA:

The properties of PA are influenced by the crystallisation index and moisture content. Increased moisture content and/or decreasing crystallisation index offer lower stability properties, but greater viscosity.

PA has a good chemical resistance against organic solvents but it can be affected easily with acids and oxidizing chemicals.