Assay (as NH3)........................................................................30,0-34,0 %

pH of 5% solution, about 8,6............................................................... p/t.

Chloride, not more than................................................................ 0,003 %

Non-volatile residue, not more than............................................... 0,05 %

Sulphur compounds (as SO4), not more than............................... 0,005 %

Sulphate, not more than................................................................ 30 ppm

Arsenic, not more than.................................................................... 3 ppm

Mercury, not more than................................................................... 1 ppm

Lead, not more than........................................................................ 3 ppm