Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 93619 Urea & Caprolactam Price on request 35752 1,2-Dibromo-3-chloropropane Price on request 3344.9-100-HX Chlorpyrifos, 100µg/mL, Solvent-hexane, Unit 1mL, # of units-1, Cas.no. 2921-88-2 Price on request