Ammonia as (NH4+) Back Catalog number: 54112 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 59017 Simple Cyanide (CN-) Price on request 54505 Phosphate (PO4-3) as P, 1000µg/ml in Water, 500ml Price on request 54101 Chloride (Cl-), 1000µg/mL in Water, 100ml Price on request