Special provision 252

(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 ADR 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.