1,2-Dimethylnaphthalene, certified, 50mg Back Catalog number: C20750000 Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-B200 Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 30102 EPA Method 551.1 Surrogate Standard Price on request 9507.9-100-AC Dichlorprop-d3,100 µg/mL,acetone,1mL Price on request