Method 1640 Tuning Standard Back Catalog number: 52147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79178 Endosulfan I Price on request 71739 Benzo(a)pyrene-d12 Price on request 11195.18-K-ME Triflupromazine hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request