Index name

excellent grade

first grade

qualified

Appearance

colorless transparent liquid

Phosphorus oxychloride content%

≥99.5

≥99.5

≥99.0

Phosphorus trichloride content%

≤0.05

≤0.20

≤0.50

Boiling range(105-109 °C)(v/v)%

≥98.0

≥97.5

≥97.0

Arsenic ppm

≤1

≤3

≤5

Iron ppm

≤1

≤3

≤5

Plumbum ppm

≤1

≤3

≤5