(1) Ammonium nitrate hot concentrated solutions can be carried under this entry provided:

(a) The solution contains not more than 93% ammonium nitrate; 
(b) The solution contains at least 7% water;
(c) The solution contains not more than 0.2% combustible material;
(d) The solution contains no chlorine compounds in quantities such that the chloride ion level exceeds 0.02%;
(e) The pH of an aqueous solution of 10% of the substance is between 5 and 7, measured at 25 °C; and
(f) The maximum allowable carriage temperature of the solution is 140 °C.

(2) Additionally, ammonium nitrate hot concentrate solutions are not subject to RID provided:

(a) The solution contains not more than 80% ammonium nitrate;
(b) The solution contains not more than 0.2% combustible material;
(c) The ammonium nitrate remains in solution under all conditions of carriage; and
(d) The solution does not meet the criteria of any other class.