Factory-supplied Industrial-grade Diammonium Phosphate (dap) Powder, Soft Water Buffer, Sewage and Wastewater Treatment Agent, Fire Retardant
Serial Number |
Indicator Name |
National Standard |
Internal Control Indicator |
1 |
Main content [calculated as (NH4)2HPO4] %≥ |
95.0 |
99.0 |
2 |
Phosphorus pentoxide (calculated as P2O5) %≥ |
51.0 |
53.0 |
3 |
Nitrogen (calculated as N) %≥ |
18.0 |
21.0 |
4 |
Arsenic (AS) %≤ |
/ |
0.005 |
5 |
Fluoride (calculated as F) %≤ |
0.01 |
0.001 |
6 |
Heavy metals (calculated as Pb) %≤ |
/ |
0.001 |
7 |
Water-insoluble matter %≤ |
/ |
0.008 |
8 |
Moisture %≤ |
5.0 |
0.1 |
9 |
Sulfate (calculated as SO4), %≤ |
/ |
0.005 |
10 |
Iron (calculated as Fe) %≤ |
/ |
0.005 |
11 |
Lead (calculated as Pb) %≤ |
/ |
0.0004 |
12 |
PH (10g/L solution) |
/ |
7.5-8.2 |
13 |
Chloride (calculated as Cl), %≤ |
/ |
0.001 |
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