N-Nitrosodi-n-butylamine Back Catalog number: 70420 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-12468-S 1,2,4,6,8-Pentachlorodibenzofuran, 1.2ml x 50ug/ml, nonane Price on request 94980 PCB Congener Mix #2 Price on request 679449 Heptachlor-exo-epoxide, 100 µg/ml, Methanol, 1ml Price on request