WP Total Hardness Back Catalog number: 54597 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 38152 WS 1,4-Dioxane Price on request 8823.8-10MG 2,4,5,6-Tetrachloro-m-xylene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. Price on request 2574.26-100-T Benzo[a]pentacene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 239-98-5 Price on request