Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 12055.8-K-ME Tetrahydro-5-methyl-2-furanMeOH,1000 µg/mL,MeOH,1mL Price on request 71784 N-Phenyl-N’-isopropyl-p-phenylenediamine Price on request CFN98774 Daidzein, >98%, 20mg Price on request