EPA Method 551.1 Internal Standard Back Catalog number: 30103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended K0007 Disodium 2-Oxoglutarate, >98%, 5g Price on request 73208 2-(Methylthio)aniline Price on request PN-36S 1,2,5,6-Tetrachloronaphthalene, 1.2mL x 50ug/mL, nonane Price on request