Ammonium (NH4+) Back Catalog number: 54533 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10626.12-50-NN 1,2,3,7,8-Pentachlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL, Price on request 61014 Minn Dept of Health List - Mix #5 Price on request 682066 2,4-Dichloroaniline, 100 µg/ml, Methanol, 5ml Price on request