Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 79761 Permethrin (mix isomers), 1000µg/ml in Acetonitrile, 1ml Price on request 10294.5-100-MEX5 N-Nitroso-L-proline Price on request 71395 4-Amino-2,6-dinitrotoluene Price on request