Silica gel is silicone dioxide (SiO2).  It is a naturally occurring mineral that is purified and processed into either granular or beaded form. As a desiccant, it has an average pore size of 2.4 nanometers and has a strong affinity for water molecules.

Silica gel perform best at room temperature (70oF – 90o) and high Relative Humidity (RH 60 to 90%) and will drop the relative humidity in a container down to around RH 40%.  Silica gel has been approved by the FDA, which is widely use in food and pharmaceutical application.

Technical Data Sheet (TDS)

Name: NARROW-PORED SILICA GEL

(Item)		(Specification)
		（Superior）	（Normal）
(Size)		1-3MM \ 2-5MM
(Appearance)		(Granule, Transparent, Translucent)
(Adsorption Capacity) , %	RH=20% ≥ ％	10.7	10.3
	RH=50% ≥ ％	25.5	24.7
	RH=90% ≥ ％	37	35.4
Ratio of Size Qualified，% ≥		99.9	99.9
PH Value		4.63	4.36
Specific Resistance , Ω.cm ≥		3500	3200
Silica，% ≥		99	99
Bulk Density,g/l ≥		780	770
Qualified Ratio of Spherical Granules,% ≥		92	90
Loss on Heating , % ≥		2	5

 

Types of Dessicant

White Silica Gel	Blue Silica Gel
Orange Indicating Silica Gel	Desiccant Clay