WP Total Hardness Back Catalog number: 54156 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2762.13-1G 4,4'-Methylenedianiline, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 101-77-9 Price on request 673777 Dazomet, 100 µg/ml, Ethyl acetate, 5ml Price on request 8608.3-K-ME (S)-(+)-3-Chloro-1,2-propanediol, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 60827-45-4 Price on request