525.2 Calibration Standard Back Catalog number: 94894 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-27-S 2,7-Dichlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 95043 Chlorinated Pesticide Standard Price on request 79171 Prometon Price on request