| Identification | Back Directory | [Name]
Silica gel | [CAS]
112926-00-8 | [Synonyms]
SAND
G118307
SILICA GEL
IATROBEADS
DAVISIL(TM)
CAB-OSIL M-5
SILICAR CC-4
SILICA GEL 7
WAKOGEL(R) G
Drying perls
Silica gel I
WAKOGEL(R) DX
SILICA GEL-WP
SILICA GEL 7G
SILICA GEL 30
SILICA GEL 60
SILICA GEL 100
WAKOGEL(R) B-0
WAKOGEL(R) B-5
WAKOGEL(R) S-1
230-400 Mesh
Silica gel,lump
WAKOGEL(R) Q-12
WAKOGEL(R) Q-22
WAKOGEL(R) Q-23
WAKOGEL(R) Q-50
WAKOGEL(R) Q-63
WAKOGEL(R) B-5F
WAKOSIL(R) 5SIL
SILICA STANDARD
SILICA GEL, C18
SILICA GEL 60 G
AEROSIL(TM) 200
WAKOGEL(R) B-10
COLLOIDAL SILICA
LICHROSORB(R) 60
BAKER SILICA GEL
THE(R) DESICCANT
WAKOGEL(R) B-0 F
WAKOGEL(R) C-100
WAKOGEL(R) C-200
WAKOSIL(R) 25SIL
WAKOSIL(R) 40SIL
WAKOSIL(R) C-200
WAKOSIL(R) C-300
WAKOGEL(R) FC-40
WAKOGEL(R) LP-20
WAKOGEL(R) LP-40
WAKOGEL(R) LP-60
WAKOGEL(R) C-300
Silicon collosol
HYDROPHOBICSILICA
WAKOGEL(R) C-300E
WAKOGEL(R) C-200E
WAKOGEL(R) B-5 FM
SILICON(IV) OXIDE
SILICA GEL ORANGE
CAB-O-SIL(TM) M-5
particulatesilica
SILICA GEL, 1-3 MM
WAKOGEL(R) C-300HG
WAKOGEL(R) C-400HG
WAKOGEL(R) C-500HG
WAKOGEL(R) FC-40FM
SILICA GEL, 3-6 MM
SilicaGel60-200Mesh
SILICAGEL,ULTRAPURE
PEI-Silica gel
WAKOSIL(R) 5SIL-120
WAKOSIL(R) 7SIL-120
amorphoussilica,gel
silica,amorphous,gel
DRYING PEARLS ORANGE
SILICA GEL, GRADE 03
SILICA GEL, GRADE 12
SILICA GEL, TYPE 60A
SILICA GEL, GRADE 42
SILICA GEL, GRADE 49
SILICA GEL, GRADE 59
SILICA GEL, GRADE 62
SILICA GEL 8-20 MESH
SILICA GEL DESICCANT
SILICA GEL, 3-9 MESH
SILICA GEL 4-10 MESH
SILICA GEL BLUE, ACS
SilicaGelHf254ForTlc
SilicaGel100-200Mesh
SilicaGel200-400Mesh
SilicaGelGf254ForTlc
Silica gel,bead shape
SILICA GEL 12-28 MESH
SILICA GEL, GRADE 922
SILICA GEL, GRADE 923
SILICA GEL, GRADE 408
SILICA GEL, TYPE 150A
SILICA GEL, OCTADECYL
SILICA GEL, 6-16 MESH
SILICA GEL, 14-20 MESH
Silica gel,coarse mesh
SILICAGEL,DRY,ULTRAPURE
SILICA GEL 230-400 mesh
SILICA GEL BLUE, 1-3 MM
SILICA GELS 28-200 MESH
SILICA GEL 60 SILANIZED
silica(non-specificname)
SILICA GEL SPHERICAL, 70
SILICA GEL SPHERICAL, 100
SILICA GEL SPHERICAL, 300
SILICA GEL 60 70-230 MESH
SILICA GEL SPHERICAL, 200
SILICA 100 ANGSTROM 3-6 μM
SILICA 60 ANGSTROM 10-18UM
SILICA 60 ANGSTROM 0-63 μM
SILICA GEL CHROMATOGRAPHIC
silica aerogel,micron=sizde
SILICA 60 ANGSTROM 32-63 μM
SILICA 60 ANGSTROM 18-32 μM
silicagel,pptd.,cryst.-free
amorphoussilica,precipitated
SILICA GEL IMPAQ RG 1080 SIL
PRESEP(R) SILICA GEL TYPE 3L
WATER-IMPREGNATED SILICA GEL
SILICA 60 ANGSTROM 63-200 μM
SILICA 100 ANGSTROM 32-63 μM
SILICA 100 ANGSTROM 10-18 μM
SILICA 100 ANGSTROM 18-32 μM
SILICA 60 ANGSTROM 63-100 μM
SILICA 100 ANGSTROM, 7-12 μM
SILICA 100 ANGSTROM 63-100 μM
SILICA 60 ANGSTROM 200-500 μM
SILICA 100 ANGSTROM 63-200 μM
SILICAGEL,SPHERICAL,ULTRAPURE
silica,amorphous,precipitated
SILICA GEL, GRADE 03, >8 MESH
SILICA GELS SIZE 230-400 MESH
Dry silica gel,high-effecienty
SILICA GEL 60 (200-500 MICRON)
SILICA 100 ANGSTROM 100-200 μM
for flash coluMn chroMatography
SILICA GEL, GRADE 40, 6-12 MESH
SILICA GEL GRADE 15 30-60 MESH
Silica gel macroporous roundness
SILICA GEL GRADE 922-200 MESH
SILICA GEL, GRADE 12, 28-200 MESH
Superfine silicon dioxide aerogel
Silica gel,self changeable colour
Silica gel 60, 40-63 micron grade
Silica gel 60, 35-70 micron grade
SILICA GEL, 6-20 MESH, INDICATING
SILICA GEL WITH HUMIDITY INDICATOR
Precipitated silica and silica gel
SILICA GEL H FOR TLC WITHOUT CASO4
SILICA ACTIVE 60 ANGSTROM 32-63 μM
SILICA ACTIVE 60 ANGSTROM 18-32 μM
SILICA GEL, GRADE 923, 100-200 MESH
SILICA ACTIVE 60 ANGSTROM 63-100 μM
SILICA ACTIVE 60 ANGSTROM 32-100 μM
SILICA ACTIVE 60 ANGSTROM 63-200 μM
Silica Gel (PPTD) Micronized 1000gM
silica precipated, crystalline free
silica,amorphous,precipitatedandgel
SULFURIC ACID-IMPREGNATED SILICA GEL
SILICA ACTIVE 60 ANGSTROM 200-500 μM
SilicaGelSelf-Indicating6-20MeshBlue
SILICA ACTIVE 60 ANGSTROM 100-200 μM
SILICA GEL G FOR TLC WITH ~13% CASO4
SilicaGelSelf-Indicating(Coarse-Blue)
Silica gel,crude-pored microspherical
Amorphous silica, precipitated silica
Silica gel G Pre-coated Plate for TLC
Silica gel H Pre-coated Plate for TLC
SILVER NITRATE-IMPREGNATED SILICA GEL
SILICON DIOXIDE PYROGENE, HIGHDISPERS
SILICA GEL WITH FLUORESCENT INDICATOR
PHTHALOCYANINE IMMOBILIZED SILICA GEL
PEI-Silica gel,Polyethylenimine-silica
Silica gel GF Pre-coated Plate for TLC
SILICA GEL 60 FOR COLUMN CHROMATOGRAPHY
Silica Gel, Macroporous Spherical Shape
SILICA GEL, DESSICANT, GRADE H, TYPE II
SILICA GEL 60 FOR PREP. COLUMN CHROMAT.
SILICA GEL DAVISIL GRADE 635 &
SILICA GEL 70-230 MESH 60 ANGSTROM &
SILICA GEL DAVISIL GRADE 634 &
SILICA GEL MERCK GRADE 7754 HIGH PURI&
SILICA GEL, 200-400 MESH, 60 ANGSTROM, &
SILICA GEL TLC STANDARD GRADE WITHOUT&
SILICA GEL DAVISIL GRADE 645 &
SILICA GEL TLC STANDARD GRADE WITH &
SILICA GEL GRADE 62 60-200 MESH &
SILICA GEL TLC HIGH-PURITY GRADE WITH&
SILICA GEL MERCK GRADE 10184 70-230 &
SILICA GEL DAVISIL GRADE 646 &
SILICA GEL DAVISIL GRADE 644 &
SILICA GEL DAVISIL GRADE 643 &
SILICA GEL MERCK TLC GRADE 7749 WITH&
SILICA GEL 130-270 MESH 60 ANGSTROM &
SILICA GEL DAVISIL GRADE 633 &
SILICA GEL MERCK GRADE 10181 35-70 &
SILICA GEL DAVISIL GRADE 636 &
SILICA GEL DAVISIL GRADE 710 &
SILICA GEL MERCK GRADE 9385 230-400 &
SILICA GEL MERCK TLC GRADE 11695 WIT&
SILICA GEL MERCK GRADE 60 70-230 MES&
SILICA GEL MERCK TLC GRADE 11678 WITH&
SILICA GEL, 200-425 MESH, 60 ANGSTROM, &
SILICA GEL MERCK GRADE 10180 70-230 &
SILICA GEL WITH MOISTURE INDICATOR (BROW
SILICA GEL WITH MOISTURE INDICATOR (ORAN
Silica gel, precipitated, crystalline free
SilicaGel60-120MeshForColumnChromatography
POTASSIUM HYDROXIDE-IMPREGNATED SILICA GEL
silica gel 60, 0.035-0.070mm (220-440 mesh)
Silica Gel, Dry, 0.001 in. Thick, Ultrapure
High Silica gel GF Pre-coated Plate for TLC
Silica Gel, Grade PA-400, 8-20 Mesh (Nominal)
High Silica gel HF254 Pre-coated Plate for TLC
SILICA GEL, TLC STANDARD GRADE, WITHOUT BINDER
SILICA GEL FIA, 0.071-0.63 MM, ACC. TO D IN 51791
SILICA GEL 100 FOR COLUMN CHROMATOGR. 0. 2-0.5 MM
SILICA GEL FIA, 0.071-0.16 MM, ACC. TO D IN 51791
SILICA GEL, GRADE 62, 60-200 MESH, 150 A NGSTROMS
SILICA GEL 60 FOR COLUMN CHROMATOGRAPHY 0.2-0.5 MM
SILICA GEL, TLC HIGH-PURITY GRADE, WITHO UT BINDER
SILICA GEL 40 FOR COLUMN CHROMATOGRAPHY 0.2-0.5 MM
SILICON DIOXIDE, AMORPHOUS GEL: 30% IN ISOPROPANOL
SILICA GEL PEI-SILICA MACROPOROUS*BEADS 20-40 MESH
SILICA GEL 60, FOR PREP. COLUMN CHROMAT. < 0.04 MM
SILICA GEL 60, FOR COLUMN CHROMATOGRAPHY , 20-40 UM
Silica, amorphous-precipitated and gel, respirable
Drying agent free of metal salts, Silica gel
SILICA GEL, TLC STANDARD GRADE, WITH GYP SUM BINDER
SILICA GEL 60 FOR COLUMN CHROMATOGRAPHY 230-400 MESH
SILICA GEL 60 FOR COLUMN CHROMATOGRAPHY (40-60 MESH) | [EINECS(EC#)]
231-545-4 | [Molecular Formula]
O2Si | [MDL Number]
MFCD00221516 | [Molecular Weight]
60.08 |
| Chemical Properties | Back Directory | [Appearance]
Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder | [Melting point ]
1610°C | [Boiling point ]
2230℃ | [density ]
2.6 | [Fp ]
23°C | [storage temp. ]
2-8°C | [form ]
powder or granules | [color ]
blue | [Specific Gravity]
0.88g/ml | [Odor]
Odorless | [PH]
~6.8 (10% in aq. suspension) | [PH Range]
About 7.0 | [Water Solubility ]
Insoluble in water | [Hydrolytic Sensitivity]
6: forms irreversible hydrate | [Merck ]
14,8493 | [CAS DataBase Reference]
112926-00-8 | [EPA Substance Registry System]
Silica gel, pptd., cryst.-free(112926-00-8) |
| Hazard Information | Back Directory | [Chemical Properties]
white to off-white powder | [Usage]
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. | [Potential Exposure]
Amorphous fumed silica is used as a mineral, natural or synthetic fiber. A potential danger to those involved in the production and handling of fumed silica for paint pigments or catalysts. Diatomaceous earth is used in clarifying liquids, in manufacture of fire brick and heat insulators; used as a filtering agent; as a filler in construction materials; pesticides, paints, and varnishes. A potential danger to those involved in mining of diatomaceous earth or fabrication of products there from. | [First aid]
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. If this chemical has been inhaled, remove from exposure. Transfer promptly to a medical facility. | [Incompatibilities]
Silica, amorphous is a noncombustible solid. Generally unreactive chemically. Incompatible with fluorine, oxygen difluoride, chlorine trifluoride. Soluble in molten alkalis and reacts with most metallic oxides at high temperature. | [Waste Disposal]
Sanitary landfill. | [Occurrence]
Silica gels are dispersions of colloidal silica obtained by a sol–gel process. The process consists in precipitating colloidal silica from an aqueous solution of sodium silicate by adding
hydrochloric or sulfuric acid. The colloidal precipitate or gel consists mainly of hydrated
silica (SiO2
.nH2
O). After filtration the precipitated silica is washed in order to remove residual salts and stabilized by adding ammonia or sodium hydroxide. The stabilized gel is then
dried and later calcined to obtain an activated material, usually in the form of small beads. | [Uses]
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. | [Definition]
A 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). | [Definition]
A rigid gel made by coagulatinga sol of sodium silicate andheating to drive off water. It is usedas a support for catalysts and also asa drying agent because it readily absorbsmoisture from the air. The gelitself is colourless but, when used indesiccators, etc., a blue cobalt salt isadded. As moisture is taken up, thesalt turns pink, indicating that thegel needs to be regenerated (by heating). | [General Description]
Silica gel is a rigid 3D network of colloidal silica. It is exclusively used as a support material for the active titanium(III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation lresulting in the formation of uniform polymer particles with narrow particle size distribution and high bulk density. Silica gel is classified as below:
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction | [Agricultural Uses]
A hard granular hygroscopic form of hydrated silica is
called silica gel. It is made by heating a coagulated sol of
sodium silicate. It is used as a catalyst and a desiccant. | [Purification Methods]
Before use as a drying agent, silica gel is heated in an oven, then cooled in a desiccator. Conditions in the literature range from heating at 110o for 15hours to 250o for 2-3hours. Silica gel has been purified by washing with hot acid (in one case successively with aqua regia, conc HNO3, then conc HCl; in another case it was digested overnight with hot conc H2SO4), followed by exhaustive washing with distilled water (one week in a Soxhlet apparatus has also been used), and prolonged oven drying. Alternatively, silica gel has been extracted with acetone until all soluble material was removed, then dried in a current of air, washed with distilled water and oven dried. Silica gel has also been washed successively with water, M HCl, water, and acetone, then activated at 110o for 15hours. Silicon monoxide [10097 -28 -6] M 44.1, m > 1700o, d 4 2.18. Purify the monoxide by sublimation in a porcelain tube in a furnace at 1250o (4hours) in a high vacuum (10-4mm) in a stream of N2. It is obtained as brownish black scales. [Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 696 1963.] |
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