EPA Method 8250 Back Catalog number: 82522 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-1234789-S 1,2,3,4,7,8,9-Heptachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 9745.21-100-ME 11-OH-delta-9-THC, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. Price on request 3905.16-1G Tartrazine (E102), neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 1934-21-0 Price on request