Item

      Pharm grade

       Ind. Grade

Appearance

    Colorless, viscous and     transparent liquid

    Colorless, viscous and     transparent  liquid

PG Content, % (wt)

≥ 99.8%

≥ 99.5%

Moisture, % (wt)

≤0.20

≤0.20

Color No, (Pt-Co)

≤10

≤10

Relative density, d2020 g/cm3

1.035-1.038

1.035-1.038

Index of retraction, (nD20)

1.431-1.435

1.431-1.435

Acidity (as acetic acid), %

≤0.20

≤0.20

Distillation rang, ＞95% (Vol)

184-189

184-189

Distillation volume, Vol%

≥95

Chloride, %(wt)

≤0.007

Sulfate, %(wt)

≤0.006

Heavy metals, ppm

≤5

Residue on ignition, % (wt)

≤0.07

Organic Volatile impurity Chloroform, µg/g

≤ 60

Organic Volatile impurity 1.4 dioxane, µg/g

≤ 380

Organic Voltile impurity methylene chloride,     µg/g

                                  ≤ 600

Organic Voltile impurity trichloroethylene, µg/g

≤ 80

Identification

passed