Alternate Metals 2 Back Catalog number: 52097 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50594 Copper - 20 PPM Price on request 71105 Propyl acetate Price on request 3014.10-K-IO 3,4,5-Trimethylheptane, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 20278-89-1 Price on request