p-Xylene, certified, 1ml Back Catalog number: C17945200 Availability: In the manufacturer's stock Price on request - + Recommended ULM-7312-1.2 Perchloric acid, sodium salt, 100µg/mL in Water, 1 Price on request 9443.12-100-AN Bolstar Price on request 3174.5-K-IO Ethyl propanoate, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 105-37-3 Price on request