Systems and methods providing for the introduction of a dye, particularly
a xanthene dye, and more particularly a rhodamine dye, to liquid
anhydrous ammonia to discourage theft of the anhydrous ammonia and
provide for leak detection in storage vessels. The dye will stain objects
which come into contact with the liquid anhydrous ammonia allowing for
the detection of such contact. Generally, the staining will be visible to
the naked eye, but may also fluoresce when exposed to a particular light
source such as ultra violet (UV) light.