SILICA GEL (PER KG)

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SILICA GEL 

SILICA GEL WHITE CRYSTAL BEEDS.MAINLY USED IN SHOE INDUSTRY AND OTHER INDUSTRIES.

WEIGHT- 2 GRAM SACHETS 

PACKET- 1 KG 

COLOUR- CRYSTAL WHITE 

 

DESCRIPTION AND PROPERTIES 

Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores. The voids may contain water or some other liquids, or may be filled by gas or vacuum. In the last case, the material is properly called silica xerogel.

Silica gel
Silica gel pb092529.jpg
Identifiers
ChemSpider
  • none
ECHA InfoCard 100.065.880 Edit this at Wikidata
Properties
SiO2
Molar mass 60.08 g/mol
Appearance Transparent beads
Odor Odorless
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Silica xerogel with an average pore size of 2.4 nanometers has a strong affinity for water molecules and is widely used as a desiccant. It is hard and translucent, but considerably softer than massive silica glass or quartz; and remains hard when saturated with water.

Silica xerogel is usually commercialized as coarse granules or beads, a few millimeters in diameter. Some grains may contain small amounts of indicator substance that changes color when they have absorbed some water. Small paper envelopes containing silica xerogel pellets, usually with a "do not eat" warning, are often included in dry food packages to absorb any humidity that might cause spoilage of the food.

'Wet' silica gel, as may be freshly prepared from alkalisilicate solutions, may vary in consistency from a soft transparent gel, similar to gelatin or agar, to a hard solid, namely a water-logged xerogel. It is sometimes used in laboratory processes, for example to suppress convection in liquids or prevent settling of suspended particles.