PCB No. 189, 10µg/ml in Isooctane, 10ml Back Catalog number: L20018900IO Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-J100 Mass-Labelled PCDD Internal Standard Solution, 1.2ml, nonane Price on request 98628 624B Internal / Surrogate Standard Price on request 40121 1,2-Dichloroethane-d4 Price on request