Talk:Monochloramine

How is monochloromine made?

How would someone make monochloromine 2604:3D09:4982:5400:3463:5CF1:D8C5:2837 (talk) 18:48, 7 October 2023 (UTC)[reply]

To produce a monochloramine solution for consumption, such as tap water:

Have a water solution with a free chlorine residual, HOCl & OCl, between 1 & 4 ppm (mg/L) at a pH above 8.5; aka. chlorinated water.

This can be made from water with either gaseous chlorine (Cl2) or sodium chloride (NaOCl).

Add ammonia (NH3) in a 4:1 ratio of free chlorine to ammonia; 4:1 is textbook which doesn't align with reality.

At room temperature the reaction will complete within 2 minutes and result in nearly no free ammonia; the 4:1 ratio above results in some free ammonia.

The monochloramine residual ppm should be close to, but not exceed, 3 times the total ammonia in solution if there is no free ammonia.

To avoid producing dichloramines keep the pH above 8 before adding the ammonia.

To avoid producing trichloramines keep the pH above 3 before adding the ammonia. SWRDMaster (talk) 23:04, 7 November 2023 (UTC)[reply]