Silica Gel

Sandry Clay Desiccant
January 12, 2017
3A Molecular Sieve – Insulating Glass
January 26, 2017

Silica Gel

Silica Gel Blue & White

Silica Gel is available in porous, granular , and amorphous form, synthetically manufactured from the chemical reaction between sulfuric acid and sodium silicate. The internal structure of Silica Gel is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons and other chemicals by the phenomena known as physical adsorption and capillary condensation.

Use
Static adsorption by removing of moisture and control of humidity in the package and other enclosed spaces without induced airflow.

Dynamic adsorption by removing water from a continuously flowing gas or liquid stream.
GENERAL
Trade Name Silica Gel Silica Gel Blue or Indicating Silica Gel
Chemical Family Sodium Silicate
Chemical Name Synthetic Silica Gel
Formula SiO2 .n(H2O) SiO2+H2O +CoCl 2
CAS 7631-86-9 7646-79-9
Absorption Capacity (25℃)
RH = 20% > 10.0% > 8.0%
RH = 40% > 21.0% > 13.0%
RH = 50% > 26.0% > 20.0%
RH = 80% > 33.0% > 25.0%
RH = 90% > 36.0% > 28.0%
CHEMICAL DATA
Compound Contents (%) Contents (%)
SiO2 99.71 99.71
Fe2O3 0.03 0.03
Al2O3 0.10 0.10
TiO2 0.09 0.09
CaO 0.01 0.01
ZrO2 0.02 0.02
Na2O 0.02 0.02
CoCl2 - 0.05 impregnated
Loss on drying 0.02 0.02
PHYSICAL DATA
Shape Bead Bead
Color Transparent White Blue
Particle Size 2-4mm 2-4mm
Average pore diameter 2.0-3.0nm 2.0-3.0nm
Specific surface area >600㎡/g >600㎡/g
Pore volume 0.35-0.45 ml/g 0.35-0.45 ml/g
Specific heat 0.92 KJ/ kg.℃ 0.92 KJ / kg.℃
Thermal conductivity 0.63 KJ/m.hr.℃ 0.63 KJ/m.hr.℃
Bulk Density >750.00 g/l >750.00 g/l
Moisture Loss <2.0% (180℃, 2 Hrs ) <2.0% (120℃, 2 Hrs )
PH Value (10% Aqueous Extract ) 4‐8 4‐8
Specific Resistance > 4000 .cm >1000 .cm

Before

OLYMPUS DIGITAL CAMERA

After

OLYMPUS DIGITAL CAMERA


Silica Gel White & Orange

Silica Gel is available in porous, granular , and amorphous form, synthetically manufactured from the chemical reaction between sulfuric acid and sodium silicate. The internal structure of Silica Gel is composed of a vast network of interconnected microscopic pores which attract and hold water, alcohol, hydrocarbons and other chemicals by the phenomena known as physical adsorption and capillary condensation.

Use
Static adsorption by removing of moisture and control of humidity in the package and other enclosed spaces without induced airflow.

Dynamic adsorption by removing water from a continuously flowing gas or liquid stream.
GENERAL
Trade Name Silica Gel Silica Gel Orange
Chemical Family Sodium Silicate
Chemical Name Synthetic Silica Gel
Formula SiO2 .n(H2O) SiO2 + H2O + C25H30CLN3
CAS 7631-86-9 1327-36-2
Absorption Capacity (25℃)
RH = 20% > 10.0% > 9.0% (Light Yellow)
RH = 40% > 21.0% > 20.0% (Light Green)
RH = 50% > 26.0% > 25.0% (Light Dark Green)
RH = 80% > 33.0% > 32.0%
RH = 90% > 36.0% > 35.0% (Dark Green)
CHEMICAL DATA
Compound Contents (%) Contents (%)
SiO2 99.71 99.71
Fe2O3 0.03 0.03
Al2O3 0.10 0.10
TiO2 0.09 0.09
CaO 0.01 0.01
ZrO2 0.02 0.02
Na2O 0.02 0.02
Activated coloring agent - 0.05 impregnated
Loss on drying 0.02 0.02
PHYSICAL DATA
Shape Bead Bead
Color Transparent White Orange (semi-transparent)
Particle Size 2-4mm 2-4mm
Average pore diameter 2.0-3.0nm 2.0-3.0nm
Specific surface area >600㎡/g >600㎡/g
Pore volume 0.35-0.45 ml/g 0.35-0.45 ml/g
Specific heat 0.92 KJ/ kg.℃ 0.92 KJ / kg.℃
Thermal conductivity 0.63 KJ/m.hr.℃ 0.63 KJ/m.hr.℃
Bulk Density >750.00 g/l >750.00 g/l
Moisture Loss <2.0% (180℃, 2 Hrs ) <2.0% (120℃, 2 Hrs )
PH Value (10% Aqueous Extract ) 4‐8 4‐8
Specific Resistance > 4000 .cm >1000 .cm

Silica Gel Indicator Color change according to RH