Methenamine timed burning pill test. Pill is placed in center of 9 inch burn ring and ignited. As referenced in Standards for International ASTM D2859, ISO 6925, U.S.A. CPSC 16 CFR parts 1630 & 1631 FF 1-70 & FF 2-70, Canadian CGSB 4-GP-2, British BS6307 pill test.