WP Total Hardness Back Catalog number: 54597 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9262.10-100-DRIED Tenuazonic acid, 100µg/mL, Solvent-dried down, Unit 1mL, # of units-1, Cas.no. 28540-82-1 Price on request 676451 Penthiopyrad, 100 µg/ml, Cyclohexane, 1ml Price on request 673663 Phosmet, 10 µg/ml, Ethyl acetate, 10ml Price on request