| Matter Insoluble in water,percent by weight ,Maximum | 1.0 |
| Zinc (as Zn),percent by weight ,Maximum | 21.0 |
| Lead (as pb),percent by weight ,Maximum | 0.003 |
| Copper (as cu),percent by weight ,Maximum | 0.1 |
| Magnesium (as Mg),percent by weight ,Maximum | 0.5 |
| pH not less then | 4.0 |
| Sulpher (as S), percent by weight ,Maximum | 10.0 |
| Cadmium (as Cd), percent by weight ,Maximum | 0.0025 |
| Arsenic (as As),percent by weight ,Maximum | 0.01 |