See DownloadsOtherProduct Notice-Monochloramine and Free Ammonia for details on accuracy improvements.For determination of monochloramine, free ammonia and free chlorine by the Indophenol method. Hach Methods 10171, 10172, 10200 and 10241. Pack of 100 powder pillows.*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.