EPA Method 608Mix #4 Back Catalog number: 41004 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674897 Roxithromycin, 100mg Price on request 10629.12-50-NN 1,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin ,50 µg/mL,n-nonane,1mL, Price on request 52147 Method 1640 Tuning Standard Price on request