Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 50168 Anion Mix #1 Price on request C12965400 Direct Red 28, certified, 0.1g Price on request X9150 N-Nitrosodimethylamine Price on request