Item

Grades

Premium

First

Average

Total Nitrogen

≥

46.5%

46.3%

Biuret

≤

0.5%

0.9%

1.0%

H₂O

≤

0.3%

0.5%

0.7%

Iron (by Fe)

≤

0.0005%

0.0010%

Alkalinity (by NH₃)

≤

0.01%

0.02%

0.03%

Sulfate (by SO₄^2-)

≤

0.005%

0.010%

0.020%

Insolubles

≤

0.005%

0.010%

0.040%

Particle Size

D 0.85mm-2.80mm

≥

90%

D 1.18mm-3.35mm

≥

90%

D 2.00mm-4.75mm

≥

90%

D 4.00mm-8.00mm

≥

90%

Note: The product particle size will be in one of the four diameters, and shall be marked on the package.