Silica gel

• CAS No:

112926-00-8

• Formula:

O2Si

• Chemical Name:

Silica gel, pptd., cryst.-free

Description

white to off-white powder Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powderA gel made by coagulating sodium silicate sol. The gel is dried by heatheating and used as a catalyst support and as a drying agent. The silica gel used in desiccators and in packaging to remove moisture is often colored with a cobalt salt to indicate whether it is still active (blue=dry; pink=moist). A rigid gel made by coagulatinga sol of sodium silicate andh.

Silica gel Basic Attributes

Molecular Weight ：60.0800018310547

Exact Mass ：59.967

EC Number ：231-545-4

Characteristics

PSA ：34.1

XLogP3 ：0.00000

Appearance ：blue

Density ：2.20

Melting Point ：1610°C

Boiling Point ：2230 ℃

Flash Point ：23°C

Water Solubility ：Insoluble

Storage Conditions ：2-8°C

Vapor Pressure ：0 mmHg (approx)

Flammability characteristics ：Noncombustible Solid

Explosive limit ：Silica gel at -78 deg C adsorbs 4.5 wt % of ozone, and below this temperature the concentration increases rapidly. At below -112 deg C ozone liquefies and there is a potential explosion hazard at temperatures below -100 deg C if organic material is present.

Odor ：Odorless

Taste ：Tasteless

Silica gel Use

Silica gel was used on glass plates for preparative TLC and on aluminium sheets for analytical TLC. Silica gel was used in vacuum chromatography and TLC. Silica gel was used in column chromatography.