What Is Monochloramine?
Monochloramine (NH₂Cl) is the primary and most desirable form of chloramine used in water treatment. It forms when free chlorine reacts with ammonia under controlled conditions. As the first compound in the chloramine family, monochloramine is often simply referred to as “chloramine,” though it is distinct from dichloramine and trichloramine.
In drinking water systems, monochloramine is widely used as a secondary disinfectant. Unlike free chlorine, it remains stable over long distribution distances, helping utilities maintain residual protection throughout the entire network.
If chlorine levels are not carefully balanced, the reaction can shift toward dichloramine (NHCl₂) or trichloramine (NCl₃), both of which are less effective disinfectants and can create strong, unpleasant odors. For this reason, water treatment facilities closely monitor monochloramine formation to ensure optimal disinfection performance.
Why Test for Monochloramine?
Accurate monochloramine testing is essential for maintaining safe, high‑quality drinking water and ensuring proper disinfection control.
Testing helps operators:
- Verify disinfectant levels throughout distribution systems
- Prevent formation of unwanted chloramine species
- Optimize chloramination processes
- Maintain regulatory compliance
- Ensure consistent water quality and taste
Because monochloramine stability depends on precise chemical balance, routine monitoring is critical for utilities, industrial facilities, and environmental testing programs.
Our Monochloramine Test Kits
CHEMetrics provides monochloramine test kits designed for fast, reliable measurement in both field and laboratory environments.
CHEMets® Visual Monochloramine Test Kits
These visual kits offer a simple, color‑comparison method for determining monochloramine concentration.
- Self‑filling ampoules with pre‑measured reagents
- Snap‑and‑fill design ensures consistent sample volume
- Color development compared to a calibrated comparator
- Ideal for routine field checks and distribution system monitoring
Vacu‑vials® Instrumental Monochloramine Test Kits
For applications requiring digital precision, Vacu‑vials® kits provide compatibility with most photometers and spectrophotometers.
- 13 mm self‑filling ampoules
- Enhanced accuracy for compliance reporting
- Suitable for low‑range and mid‑range monochloramine analysis
- Reduces handling of reagents for improved safety and consistency
Browse Our Test Kits
All CHEMetrics Monochloramine test kits, along with a full range of water‑quality testing supplies, are available through the AquaPhoenix Scientific eStore.