VPH Primary Calibration Rev 1.1 Back Catalog number: 97386 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 688444 Tribromoacetic acid, 100µg/ml in Water, 1ml Price on request 675724 Mecarbam, 10 µg/ml, Ethyl acetate, 10ml Price on request 70130 3,3’-Dichlorobenzidine Price on request