grade

standard

Oil drilling grade

API 13A standard

Specific gravity:≥4.2g/cm3

BaSO4:≥92%

Weight of screen residue:200mesh:<3%

                         325mesh:<5%

Chemical grade

BaSO4:>95%, Fe2O3:<1%, SrSO4:<1%,

SiO2 & CaO:a little

Oil paint grade

High whiteness, fineness at least 

through 325mesh

definition

Barite powder is made by superior crude barite through 

grinding into different meshes of powders to meet different 

application.

Main chemical

composition

BaSO4

SiO2

Fe2O3

Al2O3

92-98%

<2%

<0.04%

<0.2%

specifications

100-600mesh or as per client’s request

Quality standard for 

oil drilling grade

item

index

Specific gravity

≥4.2g/cm3

fineness

200mesh

≥97%

325mesh

≥85-90%

Water soluble matter

≤0.1%

Clay effection

≤0.125Pa.s

BaSO4

≥90%

Quality standard for 

chemical grade

grade

index

BaBO4

%

SiO2

%

Fe2O3

%

Al2O3

%

Water soluble 

salts

I

95

<1.5

<0.5

<1

<0.3

II

90

<2.5

<1.5

<2

<1.0

III

85

<2.5

<1.5

<2

<1.0

Quality standard for 

paintings and other

industry

application

index

remark

BaSO4

%

CaCO%

Fe2O3

%

mesh

paintings

90-95

0.05

<325

high whiteness

Rubber filler

>98

<0.36

trace

<325

No impurity of Mn, 

Cu, Pb

Common glass

>96

<0.1

<0.2

60

SiO2<1.5%

Al2O3<0.15%

lithopone

95-98

<1

SiO2<1%, Al2O3:

as little as possible

Main application

Oil drilling, paintings, rubber filler, common glass, producing lithopone etc.

packing

25kg/bag, 1ton jumbo bag or as per client’s request