Method 1640 Tuning Standard Back Catalog number: 52147 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72452 3-Ketocarbofuran Price on request 11647.9-K-ME (+/-)-Normetanephrine hydrochloride,1000 µg base/mL,MeOH,1mL, Price on request X9038 4-Chloroaniline Price on request