Iowa BTEX Back Catalog number: 51181 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3128.3-K-IO Trianoic acid (Propionic), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 79-09-4 Price on request 71787 2-Chloro-m-xylene Price on request 52038 Interference Standards Set Price on request