Precipitated Silica and Silica Gel
Keeping track with latest market development we, Hir Primak Enterprise, are importers,Suppliers & Exporters of Silica and Silica Gel which is an amorphous form of silicon dioxide, which is synthetically produced in the form of hard irregular granules or beads. A micro porous structure of interlocking cavities gives a very high surface area (800 square meters per gram). It is this structure that makes silica gel a high capacity desiccant. Water molecules adhere to the gels surface because it exhibits a lower vapour pressure than the surrounding air. Silica gel physically adsorbs water vapour into its internal pores.
Standard white silica gel is referred to as being non-indicating. As it adsorbs moisture it remains physically unchanged. Non-indicating silica gel is both cheap and effective, available loose in bulk packs or packed in sachets. Indicating silica gels are colored gels whose colour changes as they absorb moisture.
Specification: CAS No. 112926-00-8
|Surface Area m²/gm
||110 – 240
|Moisture content at 105°C, 1 Hrs. Max%
|Bulk density gm/cc
||0.08 – 0.20
||175 – 260
|Oil absorption %
||180 – 270
|Soluble salt % max
|R2O3 max %
|SiO2 – max %
For MSDS please write to us
Advantages of silica gel as a desiccant:
- - It will adsorb up to one third of its own weight in water vapour. So it is the preferred choice where weight or efficiency are important factors.
- - It has an almost indefinite shelf life if stored in airtight conditions.
- - It can be regenerated and reused if required. Gently heating silica gel will drive off the adsorbed moisture and leave it ready for reuse.
- - It is a very inert material, it will not normally attack or corrode other materials and with the exception of strong alkalis and hydrofluoric acid is itself resistant to attack.
- - It is non-toxic and non-flammable.
- - It is most frequently and conveniently used packed in a breathable sachet or bag. These are available in a wide range of sizes suitable for use with a wide range of applications.