ASTM D 5666 - 95 Standard Test Method for Rubber Chemical Antidegradants - Purity of p-Phenylenediamine (PPD) Antidegradants by High Performance Liquid Chromatography

American Society for Testing and Materials (ASTM). Current edition approved Dec. 1, 2004. Published December 2004. Originally
approved in 1995. Last previous edition approved in 2000 as D 5666 - 95 (2000). This test method covers the purity of Type I, II, and III
p-phenylenediamine (PPD) antidegradants as described in Practice D 4676 by high performance liquid chromatography (HPLC) using ultraviolet detection and external standard calculations.