EPA 1620 Standard 5 Back Catalog number: 53143 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended NK-ST-A4 Native PCDD/PCDF Solution/Mixture, 1.2ml, nonane Price on request 688502 D6-Metolachlor, 100µg/ml in Acetonitrile, 1ml Price on request 94736 4-Chloro-2-methylaniline Price on request