Molecular formula:

ZnO

Molecular weight:

81.39

Physical and chemical property:

White or a little yellow powder, density 5.606, fusion point: 1975℃.It is a kind of two characters oxide, dissolve in acid and alkaline solution, insoluble in water or ethanol. It is yellow color at the high temperature, resume being white after cooling.

Grade 1

Grade 2

Grade 3

Grade 4

Zinc oxide(counted by dried subtances )%≥

99.7

99.5

99

98

Metal ( zn ) %≤

no

no

no

no

Lead oxide( Pb ) %≤

0.037

0.1

0.18

0.2

105℃ volatile substances %≤

0.3

0.4

0.6

0.8

Grain size （um）

2–20

4－50

4－50

4－60

Absorption oil value g/100g %≤

14

14

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/

Color（with standard sample）

white

white

little yellow

little yellow

Decoloration strength (with standard sample)

100

95

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/