WP Total Hardness Back Catalog number: 54597 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 675559 Dimefuron, 10.0 µg/ml, Acetonitrile, 10ml Price on request 676441 1-Naphthylacetamide, 500mg Price on request 0296.19-200-T 5-Methylchrysene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 3697-24-3 Price on request