EPA Method 8275A Mix #2 Back Catalog number: 82751 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79663 Pyrene Price on request 92270 Citric acid [3% wt] Price on request PTBX 2,3,5,6-Tetrabromo-p-xylene, 1.2ml x 50ug/ml , toluene Price on request