17 alpha(H),21ß(H)-25-Norhopane, 1µg Back Catalog number: 2638.29-1UG Manufacturer: CHIRON AS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-A Mass-Labelled PCDD Internal Standard Solution, 1.2ml x 1ug/ml, nonane Price on request 60242 Aroclor 1242 in Transformer Oil Price on request 1371.4-1ML 2-Butanone, neat, Solvent-neat, Unit 1mL, # of units-1, Cas.no. 78-93-3 Price on request