Chlorine

Douma

 * DIFFERENT STAGES OF COLOUR OF BED PLUS AUTO-REFRIGERATION INDICATE CHLORINE WAS USED IN DOUMA - FEIT OF FAKE, May 2, 2018

Chlorine properties

 * What is Auto-refrigeration? - Chlorine Institute, February 10, 2015 (video)
 * CHLORINE - FOR DUMMIES - Michael Kobs on Twitter, May 2, 2018