Paragraph 16
Ammonium nitrate (350/2,500): technical grade
This applies to ammonium nitrate and mixtures of ammonium nitrate in which the nitrogen content as a result of the ammonium nitrate is—
(a)
between 24.5% and 28% by weight, and which contain not more than 0.4% combustible substances;
(b)
more than 28% by weight, and which contain not more than 0.2% combustible substances.
It also applies to aqueous ammonium nitrate solutions in which the concentration of ammonium nitrate is more than 80% by weight.