8270 Base/Neutral Add-Mix Back Catalog number: 94544 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 92703 Surrogate Standard Price on request 11749.12-100-IO 2,2',4,4',5,6'-Hexachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 8483.19-250MG Metoprolol tartrate, neat, Solvent-neat, Unit 250mg, # of units-1, Cas.no. 56392-17-7 Price on request