CLP Acid & Base/Neutral Surrogate Mix Back Catalog number: 21056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2888.30-50-IO 17 alpha(H),21 alpha(H)-Hopane, 50µg/mL in Isooctane, 1ml Price on request 66155 2,2’,4,4’,6,6’-Hexachlorobiphenyl (155) Price on request 2125.12-10-IO Arochlor 1221 , 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 11104-28-2 Price on request