BTEX (20 µg/mL) Back Catalog number: 98518 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8866.9-K-IO 5-Methylquinoxaline, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request 675586 Sulfaphenazole, 100mg Price on request 79114 2,4’-DDE, 1000µg/ml in Hexane, 1ml Price on request