Internal Reference Standard Back Catalog number: 52187 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678995 Tefluthrin, 100 µg/ml, Toluene, 1ml Price on request 681864 D-Psicose, 10mg Price on request 4H187 2,2',3,4',5,5',6-Heptachloro-4-biphenylol, 1.2ml x 50ug/ml, nonane Price on request