Internal Reference Standard Back Catalog number: 52187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M331190 N2-Methyl Trimethoprim (Impurity), 10mg Price on request 3392.9-100-CY Endosulfan sulfate, 100µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 1031-07-8 Price on request BDE-153S 2,2',4,4',5,5'-Hexabromodiphenyl ether,50µg/ml,1ml Price on request