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ChemicalBook > Product Catalog >Inorganic chemistry >Oxides and peroxides >non-metals oxides and peroxides >Silicon dioxide

Silicon dioxide

Silicon dioxide Structure
CAS No.
7631-86-9
Chemical Name:
Silicon dioxide
Synonyms
Aerosil;White carbon;NEOSYL;Dioxosilane;Geduran Si 60;SILICA GEL BLUE;Hollow glass microspheres;Silica gel 60 (0.015-0.040 mm);LICHROSORB SI 100 (10 MYM) 10 G;SILICA GEL 60 PF254 FOR PREPARATIVE LAYE
CBNumber:
CB8138262
Molecular Formula:
O2Si
Molecular Weight:
60.08
MOL File:
7631-86-9.mol
MSDS File:
SDS
Modify Date:
2024/12/18 14:15:32
Request For Quotation

Silicon dioxide Properties

Melting point >1600 °C(lit.)
Boiling point >100 °C(lit.)
Density 2.2-2.6 g/mL at 25 °C
vapor pressure 13.3hPa at 1732℃
refractive index 1.46
Flash point 2230°C
storage temp. 2-8°C
solubility Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.
pka 6.65-9.8[at 20 ℃]
form suspension
Specific Gravity 2.2
color White to yellow
PH 5-8 (100g/l, H2O, 20℃)(slurry)
Odor at 100.00?%. odorless
Resistivity 1∞10*20 (ρ/μΩ.cm)
Water Solubility insoluble
Sensitive Hygroscopic
Hydrolytic Sensitivity 6: forms irreversible hydrate
Crystal Structure Trigonal
Merck 14,8493
Exposure limits NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3
Stability Stable.
CAS DataBase Reference 7631-86-9(CAS DataBase Reference)
IARC 3 (Vol. Sup 7, 68) 1997
NIST Chemistry Reference Silicon(iv) oxide(7631-86-9)
EPA Substance Registry System Silica (7631-86-9)

SAFETY

Risk and Safety Statements

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H317-H412
Precautionary statements  P261-P272-P273-P280-P302+P352-P333+P313
Hazard Codes  Xn,Xi
Risk Statements  36/37/38-36/37-22-43-52/53-36/38
Safety Statements  26-37/39-36-36/37/39-36/37-61
OEB B
OEL TWA: 6 mg/m3
HS Code  2811221000
Toxicity LC inhalation in rat: > 200gm/m3/1H
IDLA 3,000 mg/m3
NFPA 704
1
2 0

Silicon dioxide price More Price(180)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich(India) 916153 Lithium modified silica nanoparticles pore size non-porous, 400?nm particle size 7631-86-9 1G ₹23027.18 2022-06-14 Buy
Sigma-Aldrich(India) 915904 Lithium modified silica nanoparticles pore size non-porous, 600?nm particle size 7631-86-9 1G ₹23027.18 2022-06-14 Buy
Sigma-Aldrich(India) 915645 Lithium modified silica nanoparticles pore size non-porous, 200?nm particle size 7631-86-9 1G ₹23027.18 2022-06-14 Buy
Sigma-Aldrich(India) 914908 Lithium modified silica nanoparticles pore size non-porous, 200?nm particle size, 20?% (w/w) in ethanol 7631-86-9 1ML ₹32567.18 2022-06-14 Buy
Sigma-Aldrich(India) 914622 Silica nanoparticles pore size non-porous, 500?nm particle size, 5?% (w/w) in water, dispersion 7631-86-9 2ML ₹15085.13 2022-06-14 Buy
Product number Packaging Price Buy
916153 1G ₹23027.18 Buy
915904 1G ₹23027.18 Buy
915645 1G ₹23027.18 Buy
914908 1ML ₹32567.18 Buy
914622 2ML ₹15085.13 Buy

Silicon dioxide Chemical Properties,Uses,Production

Chemical Properties

white crystals or powder

Physical properties

Colorless amorphous (i.e., fused silica) or crystalline (i.e., quartz) material having a low thermal expansion coefficient and excellent optical transmittance in far UV. Silica is insoluble in strong mineral acids and alkalis except HF, concentrated H3PO4, NH4 HF2 , concentrated alkali metal hydroxides. Owing to its good corrosion resistance to liquid metals such as Si, Ge, Sn, Pb, Ga, In, Tl, Rb, Bi, and Cd, it is used as crucible container for melting these metals, while silica is readily attacked in an inert atmosphere by molten metals such as Li, Na, K Mg, and Al. Quartz crystals are piezoelectric and pyroelectric. Maximum service temperature 1090°C.

Uses

Silicon(IV) oxide, amorphous is used as carriers, processing aids, anti-caking and free-flow agents in animal feed. Defoamer applications such as paint, food, paper, textile and other industrial applications. Synthetic silicon dioxides are used as a rheology control agent in plastics. It is also used to manufacture adhesives, sealants and silicones.

Definition

ChEBI: A silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.

General Description

contains sodium stabilizing counterion

Hazard

Not toxic if ingested, inhaled silica dust can cause silicosis; carcinogen.

Agricultural Uses

Silica is silicon dioxide, one of the most abundant materials on the earth's crust. Quartz is an example of silica. It is used as a filler in fertilizers, and also, in the manufacture of glass, ceramics, abrasives, rubber and cosmetics.

Safety Profile

The pure unaltered form is considered a nuisance dust. Some deposits contain small amounts of crystahne quartz and are therefore fibrogenic. When diatomaceous earth is calcined (with or without fluxing agents) some sdica is converted to cristobalite and is therefore fibrogenic. Tridymite has never been detected in calcined batomaceous earth. See also other silica entries

Potential Exposure

Diatomaceous earth is used as a filtering agent and as a filler in construction materials, pesticides, paints, and varnishes. The calcined version (which has been heat treated) is the most dangerous and contains crystallized silica, and should be handled as silica. See also other entries on silica

Shipping

This material is not singled out by DOT in its Performance-Oriented Packaging Standards.

Purification Methods

Purification of silica for high technology applications uses isopiestic vapour distillation from concentrated volatile acids and is absorbed in high purity water. The impurities remain behind. Preliminary cleaning to remove surface contaminants uses dip etching in HF or a mixture of HCl, H2O2 and deionised water [Phelan & Powell Analyst 109 1299 1984].

Derivatives

Precipitated silica is obtained like silica gel by acidifying an aqueous solution of sodium silicate. Precipitated silica is used as filler in rubber for automobile tires and reinforcement particulate in elastomers, and as a flatting agent in paints and coatings for improving the flatness of coatings.

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.

Silicon dioxide Preparation Products And Raw materials

Raw materials

Silica gel dilute sulphuric acid AerosilR202 (SiO2) Cyclone separator Carbon dioxide
Sodium silicate Silica glass Tetrachlorosilane Silica sand Sodium carbonate
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Preparation Products

3-Aminobenzylmethylamine Silicon monoxide Oxytocin adhesive RTP-801 2-Aminopyridin-4-ol
Silicon carbide 2-TRIFLUOROMETHYLQUINOLINE-7-CARBOXYLIC ACID 6-Chloro-2-tetralone special adhesive 90E for ceramics 3-Nitroisonicotinic acid
Dansyl chloride Calcium phosphate dibasic 5-(AMINOMETHYL)PYRIDIN-2-AMINE 1-(2,5-DIMETHYL-2H-PYRAZOL-3-YL)-ETHANONE 2-Amino-5-cyanopyridine
Silicon nitride
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Silicon dioxide Suppliers

Global( 589)Suppliers
Supplier Tel Country ProdList Advantage Inquiry
SORBEAD INDIA +91-9879203377 +91-9879203377 Gujarat, India 59 58 Inquiry
VAYUNANDAN IMPEX +919836761502 Rajasthan, India 28 58 Inquiry
HiTech Minerals And Chemicals +91-03322268228 +91-9007498592 Kolkata, India 13 58 Inquiry
Hind Exports +91-9930019318 +91-9930019318 Maharashtra, India 8 58 Inquiry
NEELKANTH FINECHEM +91-9829021177 +91-9928841166 Rajasthan, India 34 58 Inquiry
Akshar Chemicals +91-02764233007 +91-9879003693 Gujarat, India 7 58 Inquiry
JP International +91-8981352883 +91-9062225377 West Bengal, India 7 58 Inquiry
Gloria Interchem Pvt Ltd +91-9825029521 +91-9825029521 Gujarat, India 49 58 Inquiry
ADI Chemsol LLP +91-7977627608 +91-7977627608 Madhya Pradesh, India 35 58 Inquiry
Medfoun Pharma and Chemicals +91-8460265408 +91-8460265408 Gujarat, India 17 58 Inquiry
Supplier Advantage
SORBEAD INDIA 58
VAYUNANDAN IMPEX 58
HiTech Minerals And Chemicals 58
Hind Exports 58
NEELKANTH FINECHEM 58
Akshar Chemicals 58
JP International 58
Gloria Interchem Pvt Ltd 58
ADI Chemsol LLP 58
Medfoun Pharma and Chemicals 58

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Silicon dioxide Spectrum

Silicon dioxide(7631-86-9)IR

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