Citric acid Back Catalog number: 71713 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0014.16-100-T 1,6-Dinitropyrene, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 42397-64-8 Price on request 70779 Paraquat Price on request 2769.9-100-AN Propazine, 100µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 139-40-2 Price on request