Items  

MHY i

MHY ii

MHY iii

MHY iv

Prime 

First-grade

Prime

First-grade

Prime

First-grade

Prime

First-grade

Mg(OH)2      ≥

99

98

98

98

Insolubles in acid      ≤

0.02

0.05

0.02

0.05

0.02

0.05

0.02

0.05

Moisture           ≤

0.2

0.3

0.2

0.3

0.2

0.3

0.2

0.3

Cl  ≤

0.15

0.3

0.15

0.3

0.15

0.3

0.15

0.3

whiteness              ≥

95

90

95

90

95

90

95

90

Fe  ≤

0.05

0.05

0.05

0.05

Grain diameter on average(μm)  

0.4-0.8

0.4-0.8

0.4-0.8

0.4-0.8

Specific surface area(m2/g)

5-10

5-10

5-10

5-10

Buck density(g/cm3)

0.25-0.45

0.25-0.45

0.25-0.45

0.25-0.45

Surfacing activating disposal

-

Si and alkyl

Lipa and acid

Ti,acid and lipa