WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended END Endrin, 1.2mL x 100ug/mL, nonane Price on request 56078 Platinum (Pt) Price on request 1609.42-200-T Rubrene, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 517-51-1 Price on request