WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 94038 2003Mix 1 WY06 Price on request 677160 Di-n-octyltin dichloride, 1000 µg/ml, Methanol, Price on request 2454.8-K-IP 2,4-Dinitro-6-methylanisole, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 29027-13-2 Price on request