Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 72295 Dimethenamid Price on request 98515 BTEX (2.0 µg/mL) Price on request 79888 2,4-Diaminotoluene Price on request