Item

Specifications

Typical values

Superior class

First class

Qualified class

Adsorption capacity

RH=20%.% ≥

8.0

7.0

6.0

11.2

RH=50%.% ≥

20.0

19.0

18.0

29.2

RH=90%.% ≥

30.0

29.0

28.0

37.6

Loss on heating

2.0

4.0

6.0

1.0

PH value

4-8

-

-

4

Specific resistance, Ω,cm

3000

-

-

5630

Silica%

98

-

-

98.5

Qulified ratio of spherical granules,%                    ≥

82

-

-

90

Size

protocol

protocol

protocol

2-5mm

Bulk density, g/L

protocol

protocol

protocol

784

*Note: qualified ratio of spherical granules is only applicable to fine-pored silica gel