CLP Semi-Volatile Base/Neutral Surrogate Std Back Catalog number: 23016 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 91637 EPA Method 525 Price on request 2171.8-K-ME Ethylbenzene-d10, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 25837-05-2 Price on request PN-46S 1,4,5,8-Tetrachloronaphthalene (96%), 1.2ml x 48ug/ml, nonane Price on request