WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8387.18-K-IO Di-n-butyl sebacate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 109-43-3 Price on request 673588 Fenitrothion, 100 µg/ml, Ethyl acetate, 5ml Price on request 90126R Aroclor 1242 Price on request