Zinc oxide

Other names

Zinc white, Calamine, philosopher's wool, Chinese white, flowers of zinc

Identifiers

CAS number

1314-13-2 Y

PubChem

14806

ChemSpider

14122 Y

EC number

215-222-5

Properties

Molecular formula

ZnO

Molar mass

81.408 g/mol

Appearance

White solid

Odor

odorless

Density

5.606 g/cm3

Melting point

1975 °C (decomposes)[1]

Boiling point

2360 °C

Solubility in water

0.16 mg/100 mL (30 °C)

Band gap

3.3 eV (direct)

Refractive index (nD)

2.0041

Thermo chemistry

Std enthalpy offormation ΔfHo298

-348.0 kJ/mol

Standard molarentropy So298

43.9 J·K−1mol−1

Usage

Zinc oxide is an inorganic compound with the formula ZnO. ZnO is a white powder that is insoluble in water, which is widely used as an additive in numerous materials and products including plastics, ceramics, glass, cement, lubricants[2], paints, ointments, adhesives, sealants, pigments, foods (source of Zn nutrient), batteries, ferrites, fire retardants, and first aid tapes.

Index item

Zinc Oxide 99.7%/99%

For Plastic Application

For paint application

ZnO-X1

ZnO-X2

ZnO-T1

ZnO-T2

ZnO-T3

Zinc oxide      %≥

99.5

99.0

99.5

99.0

98.0

 Lead oxide  (PbO)        

 %≤

0.12

0.20

Cadmium oxide (Cdo)      

 %≤

0.02

0.05

Copper Oxide(Cuo)    

 %≤

0.006

Mangaese(Mn)                %≤

0.0002

Metallic metals(as Zn)

None

None

None

Insolubles  in HCL solution    %≤

0.03

0.04

Losses on  ignition    

 %≤

0.4

0.6

0.4

0.6

Soluble matters in water    

 %≤

0.4

0.6

0.4

0.6

0.8

Screening residues(45µm wet screen) %≤

0.28

0.32

0.28

0.32

0.35

105°C Soluble matter in water         %≤

0.4

0.4

0.4

0.4

0.4

Hiding power

g/m2 ≤

150

150

150

Oil absorption          

g/100g ≤

18

20

20

Colour killing           

 %≥

100

95

95

Colour (Compared with standard specimen)

Suit standar specimen

Notes:Special requirements should be decided through negotiation between the seller and the buyer