QC Standard 4 Back Catalog number: 52087 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70912 1,4-Dinitrobenzene, 1000µg/ml in MeOH, 1ml Price on request 71299 bis(2-n-Butoxyethyl) phthalate Price on request 8839.8-K-IO 2-Isobutylpyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. Price on request