Phosphates

Specifications	Standard value	Test result
Main contents %min	94.0	94. 1
P2O5 %min	57.0	57.07
Iron, as Fe %max	0.01	0.008
Whiteness %min	90	90
Wate insoluble %max	0.1	0.07
CL %max	0.025	0.015
PH Value( 1%solution)	9.5- 10.0	9.7
Arsenic, as As	3ppm	2.0ppm
Fluoride, as F	30ppm	25.0ppm
Heavy metals, as Pb	10ppm	8.0ppm
Density g/cm3	0.7-0.9	0.75
Particle Size (through 100mesh sieve) %min	90.0	90

Item	Specification	Analysis result
Appearance	White Powder	White Powder
Total phosphate(as P2O5) ≥%	68.0	68.5
Inactive phosphate(as P2 O5) ≤%	7.5	6.7
PH value of 1% solution	5.0 -7.5	6.37
Solubility	Qualified	Qualified
Heavy metals(as Pb) ≤%	0.001	<0.001
Arsenic(as As) ≤%	0.0003	0.00016
Fluoride(as F) ≤%	0.003	0.0004
Water insoluble ≤%	0.06	0.007
Loss on ignition ≤%	1.0	0.63
Particle size (100 mesh) pass through ≥%	90	90

Items		Standards
Assay (%) (Na2H2P2O7)		≥95.00%
P2O5 (%)		≥63.00%,≤64.5%
Fluoride(PPM)		≤10mg/kg
Cadmium(PPM)		≤1mg/kg
Lead (PPM)		≤1mg/kg
Mercury(PPM)		≤1mg/kg
Arsenic(PPM)		≤1mg/kg
Substances not dissolved in water(%)		≤1.0%
PH value(%)		≥3.7,≤4.5
Loss on drying		≤0.5%
100mesh through		>95%
200mesh through		>85%
16mesh through		≥95%
Ror		28
Aluminum(PPM)		≤200

Testing Item	Standard	Result
Phosphorus(P)/%	≥18	18.16
Citric acid soluble phosphorus/%	/	95
Calcium(Ca)/%	≥20	22.90
Fluorine(F)/%	≤0.18	0.1
Arsenic (As)/%	≤0.0020	0.0008
Heavy Metal (Pb)/%	≤0.0030	0.0004
Cadmium(Cd)/%	≤0.0010	0.0001
Chromium(Cr)%	≤0.0030	0.0005
Size(powder pass 0.5mm test sieve)/%	≥95	conforms
Size(granule pass 2mm test sieve)/%	≥90	conforms