TPH Internal Standard Back Catalog number: 92636 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72207 Metformin, 1000μg/ml in MeOH, 1ml Price on request 9928.16-5MG 6:2 Di-PAPS-d4, neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. Price on request 683418 Ethyl perfluoro(2-methyl-3-oxahexanoate), 10mg Price on request