WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1960.12-50-IO 2,3',4-Tribromodiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 147217-77-4 Price on request 3452.9-100-AN Metobromuron Price on request 3384.12-100-AN Diquat dibromide monohydrate Price on request