Fermentation Standard Back Catalog number: 97121 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MHPCB-MXA Mass-Labelled Chlorinated Biphenylol Solution/Mixture, 1.2ml, toluene Price on request 674680 D4-2-Hydroxybenzonitrile, 5mg Price on request 91161 EPA Method 525 Internals & Surrogates Price on request