EPA Method 8121 Internal Standard Back Catalog number: 81203 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended EPA-1240 1,3,5-Trichlorobenzene 1000µg/mL in Hexane, 1ml Price on request 1159.39-10MG n-Nonatriacontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 7194-86-7 Price on request 11632.25-25MG Irbesartan,neat,neat,25mg, Price on request