Item

Standard

Result

Content（Na₅P₃O₁₀）%

85.0min

95.5

Phosphorus pentoxide %

57.0min

57.3

Water-insoluble %

0.05max

0.02

Iron（Fe） %

0.01max

0.006

PH value（1% water solution）

9.5-10.0

9.70

Heavy metal (Pb)

10ppm max

6ppm

Arsenic (As) 

3ppm max

1 ppm

Fluoride (F)

10ppm max

8ppm

White content %

90.0min

92.0

Loss on drying %

0.5max

0.3

Density bulk  g/l

600-800

750

Item

Standard

Result

ASSAY % ≥

94.0

95.6

P₂O₅ % ≥

57.0

57.5

WATER INSOLUBLEMATTER %≤

0.1

0.05

LOSS ON IGNITION% ≥

1(normally)

1.5

PHVALUE(1%WATERSOLUTION)

9.2-10.3

9.6

BULK DENSITY(G/CM³)

0.9-1.2

1.0

WHITENESS %≥

85

86.1

Phase I

0-70

68