CLP Acid & Base/Neutral Surrogate Mix Back Catalog number: 21056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1832.19-K-IO Diethylene glycol mono(p-nonylphenyl) ether, mixture of isomers, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. Price on request 9138.7-K-ME Mesalazine, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 89-57-6 Price on request 70493 Thionazin Price on request