Quinoxaline-2-carboxylic acid Back Catalog number: 91819 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2574.26-100-T Benzo[a]pentacene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 239-98-5 Price on request 52139 EPA 1620 Standard 1 Price on request 3355.11-100-CY 2,4-DB methyl ester Price on request