QC Standard 5 Back Catalog number: 52088 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95807 L(+)Lactic acid Price on request 9191.8-10MG Caffeine-d3 (1-methyl-d3), neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 26351-03-1 Price on request 681407 N-Ethyl-heptadecafluorooctane sulfonamide, 100mg Price on request