WS Disinfection By-Products - Cal Check 1 Back Catalog number: 92894 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 55061 WP pH @ 25°C Price on request D-404N 2,3,7,8-Tetrachlorodibenzo-p-dioxin, 1mg Price on request 96604 Lysergic acid diethylamide (LSD) Price on request