Instrument Standard 2 Back Catalog number: 52078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0220.20-K-T Perylene, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 198-55-0 Price on request 11902.19-K-ME Protriptyline hydrochloride ,1000 µg base/mL,MeOH,1mL, Price on request 66168 2,3',4,4',5',6-Hexachlorobiphenyl (168) Price on request