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UAN is a solution of urea and ammonium nitrate in water used as a fertilizer. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N), which consists of 44.3% ammonium nitrate, 35.4% urea and only 20.4% water. Other grades are UAN 28, UAN 30, UAN 18. The solutions are quite corrosive towards mild steel (up to 500 MPY on C1010 steel) and are therefore usually equipped with a corrosion inhibitor to protect tanks, pipelines, nozzels, etc.

Physical and Chemical Characteristics of Urea Ammonium Nitrate Solutions

The solutions contain a remarkable low amount of water and nevertheless have a low salt-out temperature:

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 The solutions are quite corrosive towards mild steel (up to 500 MPY on C1010 steel) and are therefore usually equipped with a corrosion inhibitor to protect tanks, pipelines, nozzels, etc.
+== Physical and Chemical Characteristics of Urea Ammonium Nitrate Solutions==
-{{chem-stub}}
+The solutions contain a remarkable low amount of water and nevertheless have a low salt-out temperature:
+{| class="infobox bordered" style="width: 25em; text-align: centre; font-size: 95%;"
+|+ style="font-size: larger;" | Physical and Chemical Characteristics of UAN Solutions '''
+|-
+! Grade, %N:
+| 28
+| 30
+| 32
+|-
+! Ammonium Nitrate (%):
+| 40.1
+| 42.2
+| 44.3
+|-
+! Urea (%):
+| 30.0
+| 32.7
+| 35.4
+|-
+! Water (%):
+| 29.9
+| 25.1
+| 20.3
+|-
+! Specific Gravity at 16°C:
+| 1.283
+| 1.303
+| 1.320
+|-
+! Salt-out Temperature (°C):
+| -18
+| -10
+| -2
+|-
+|-
+| colspan="2" style="font-size: smaller;" | {{{footnotes|}}}
+|}

Grade, %N:	28	30	32
Ammonium Nitrate (%):	40.1	42.2	44.3
Urea (%):	30.0	32.7	35.4
Water (%):	29.9	25.1	20.3
Specific Gravity at 16°C:	1.283	1.303	1.320
Salt-out Temperature (°C):	-18	-10	-2