Item

Model and Standard

GS-20

GS-25

GS-30

GS-35

GS-40

Appearance

Slight milky transparent to translucent liquid

>SiO₂ (wt%)

20±1%

25±1%

30.5±1%

35±1%

40±1%

Na₂O (wt%)

≤0.5%

≤0.7%

pH (20°C)

9.5-11.0

Density (20°C,g/cm3)

1.12-1.14

1.15-1.17

1.19-1.21

1.24-1.25

1.28-1.30

Viscosity (20°C,mPa•S)

≤10

≤35

Particle size (nm)

8-15

10-20

Stability

Two years

One year

6 months