WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1356.6-K-MEX5 Hexachlorobenzene Price on request 73471 Bis[2-(N,N-dimethylamino)ethyl] ether Price on request 673238 Clothianidin, 10.0 µg/ml, Acetonitrile, 10ml Price on request