Item Standard Result
AppearanceWhite powder White powder
Main content %≥ 98.0 98.5
P2O5 phosphorus pent—oxide %≥ 44.6 44.8
PH water insoluble % 4.2—4.8 4.3
Water insoluble, max %≤ 0.1 0.07
Heavy metal as Pb %≤ 0.001 0.0006
Arsenic as As %≤ 0.0003 0.0001
Sieve test (through 60mesh) min %≥ 90.0 95
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