Ammonium Standard: NH4+, 1000µg/ml in Water, 100ml Back Catalog number: VHG-INH41K-100 Availability: In the manufacturer's stock Price on request - + Recommended 53087 QC Standard 4 Price on request 673716 Triadimenol, 100 µg/ml, Ethyl acetate, 5ml Price on request 64681 Malathion, 100µg/ml in MeOH, 1ml Price on request