American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2005. Published January 2006. Originally approved in 1937. Last previous edition approved in 1999 as D 464 – 95 (1999). 3 p. These test methods cover the determination of the saponification number of tall oil and products obtained by the fractionation of tall oil such as rosin, fatty acids and distilled tall oil as defined in Terminology D
804. These test methods are also applicable to gum and wood rosin. Two test methods are covered as follows:
1. Test method using a potentiometric method, and
2. Test method using an internal indicator method.