Number

Item

Powder

Granule

1

Content (dry basis)

≥98.0%

≥98.0%

2

Moisture

≤0.5%

≤0.5%

3

PH value (1%) aqueous solution

≥2.8

≥2.8

4

Residue on ignition

≤0.1%

≤0.1%

5

Cyanuric acid amide

≤0.5%

≤0.5%

6

Iron

≤35ppm

≤35ppm

7

Sulfate

≤0.5%

≤0.5%