Index name
excellent grade
first grade
qualified
Appearance
colorless transparent or light yellow liquid
Phosphorus trichloride content%
≥99.5
≥99.0
≥98.5
Free phosphor content%
≤0.0001
≤0.0005
≤0.0010
Boiling range(74.5-77.5 °C)(v/v)%
≥97.5
≥97.0
≥96.0
Phosphoric acid content(PO4-2)
≤0.2
/
Arsenic ppm
≤1
≤3
≤5
Iron ppm
Plumbum ppm
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