ChemicalBook
Chinese Japanese Germany Korea

Silicon dioxide

General Description Uses
Silicon dioxide
Silicon dioxide structure
CAS No.
7631-86-9
Chemical Name:
Silicon dioxide
Synonyms
Silica;NEOSYL;NeoBLUE;Silitech;RONASPHERE;Zeolite θ-1;Dioxosilane;SYTON? HT-50;Quartz fiber;quartzpowder
CBNumber:
CB8138262
Molecular Formula:
O2Si
Formula Weight:
60.08
MOL File:
7631-86-9.mol

Silicon dioxide Properties

Melting point:
>1600 °C(lit.)
Boiling point:
>100 °C(lit.)
Density 
2.2-2.6 g/mL at 25 °C
refractive index 
1.46
Flash point:
2230°C
storage temp. 
Refrigerator (+4°C)
solubility 
Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.
form 
suspension
color 
White to yellow
Specific Gravity
1.29
Specific Gravity
0.97
Specific Gravity
2.2
PH
5-8 (100g/l, H2O, 20℃)(slurry)
Water Solubility 
insoluble
Hydrolytic Sensitivity
4: no reaction with water under neutral conditions
Hydrolytic Sensitivity
5: forms reversible hydrate
Hydrolytic Sensitivity
6: forms irreversible hydrate
Sensitive 
Hygroscopic
Merck 
14,8493
Stability:
Stable.
Substances Added to Food (formerly EAFUS)
SILICON DIOXIDE
FDA 21 CFR
172.480; 573.940
CAS DataBase Reference
7631-86-9(CAS DataBase Reference)
FDA UNII
ETJ7Z6XBU4
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,GHS08,GHS09
Signal word  Warning
Hazard statements  H320-H350-H360-H373-H401-H411-H402-H319-H335-H317
Precautionary statements  P201-P308+P313-P405-P261-P305+P351+P338-P280-P333+P313-P264-P305+P351+P338+P337+P313-P260-P314-P501a
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
HS Code  2811221000
Toxicity LC inhalation in rat: > 200gm/m3/1H
NFPA 704
1
2 0

Silicon dioxide price More Price(215)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 420778 LUDOX? TM-50 colloidal silica 50 wt. % suspension in H2O 7631-86-9 1l $46.4 2019-12-02 Buy
Sigma-Aldrich 420778 LUDOX? TM-50 colloidal silica 50 wt. % suspension in H2O 7631-86-9 4l $128 2019-12-02 Buy
TCI Chemical S0821 Silica Gel (Spherical, 60micro m)[for Flash Chromatography] 7631-86-9 1kg $140 2019-12-02 Buy
TCI Chemical S0822 Silica Gel (Spherical, 100micro m)[for Column Chromatography] 7631-86-9 1kg $140 2019-12-02 Buy
Alfa Aesar 010856 Silicon(IV) oxide, Puratronic?, 99.999% (metals basis) 7631-86-9 100g $252 2019-12-02 Buy

Silicon dioxide Chemical Properties,Uses,Production

General Description

Silicon dioxide occurs almost everywhere on earth. It is one of the most important and abundant oxides on earth, constituting about 60% weight of the earth’s crust as silica itself or in combination with other metal oxides in silicates. It commonly is found as sand in the vast ocean and river shores, their beds, deserts, rocks, and minerals.
Silicon dioxide exists in several structural forms: polymorphic crystalline silica, synthetic quartz crystals, amorphous silica, and vitreous silica. This classification is not complete as there are other forms of silica synthesized for specialized applications.

Uses

Industry
Application
Role/benefit
Food
Powdered foods, such as salt, many spices, etc.
Ant-caking agent/ when added to a mixture, prevents its ingredients from binding together
Nutritional health food supplements
Source of silicon/maintain healthy strong bones and joints and minimizes aluminum effects on the body
Wine, beer and juice
Fining agent
Chemical manufacture
Manufacture of silicon compounds and sodium silicate
Raw material
Construction
Production of portland cement
Raw material
Sand casting
Main ingredient/high melting point
Glass
High purity silica glass
Raw material/high temperature and corrosion resistance
Domestic glass and optical devices
Essential component
Ceramics
Manufacture of ceramic glaze
Main constituents/forms glass when heated to bind others ingredients together
Metallurgy
Manufacture of silicon alloys
Raw material or additive
Pharmaceutical
Drug tablets making
Flow agent/aids powder flow when tablets are formed
Preventing Alzheimer’s disease
Effective components/minimizes aluminum effects on the body which may cause Alzheimer’s disease
Electronics
Fiber optic cables
Raw material/high level of heat conductivity and low rate of transmission loss
Wire insulation
Raw material/high melting point and good insulating property
Semi-conductors
Source of silicon
Piezoelectric transducer
Main component/can convert mechanical energy to electrical energy and vice-versa
Others
Refractory materials
Main component/high melting point and high shock resistance
Rubber and plastics
Additive/improves wearing capacity
DNA Extraction
Source of silicon/has binding properties which help to isolate the strands of DNA
Manufacture of silica gel
Source of silicon/hygroscopic property
Defoaming
Defoamer component
Silica-based aerogel
Source of silicon
Hydraulic fracturing
Thickening agent
 

Chemical Properties

Diatomaceous earth is a transparent to gray, odorless amorphous powder.

Chemical Properties

Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder

Chemical Properties

white crystals or powder

Uses

Functionalized RAFT agent for controlled radical polymerization; especially suited for the polymerization of styrene; acrylate and acrylamide monomers. Azide group can be used to conjugate to a variety of alkyne-functionalized biomolecules. Chain Transfer Agent (CTA).

Uses

SDS mixture of sodium alkyl sulfates consisting chiefly of sodium lauryl sulfate

Uses

manufacture of glass, water glass, refractories, abrasives, ceramics, enamels; decolorizing and purifying oils, petroleum products, etc.; in scouring- and grinding-compounds, ferrosilicon, molds for castings; as anticaking and defoaming agent.

Uses

Silica (SiO2) (RI: 1.48) is mined from deposits of diatomaceous soft chalk-like rock (keiselghur). This is an important group of extender pigments, which is used in a variety of particle sizes. They are used as a flatting agent to reduce gloss of clear coatings and to impart shear thinning flow properties to coatings. They are relatively expensive.

Uses

silica is also known as silicone dioxide. Silica has a variety of applications: to control a product’s viscosity, add bulk, and reduce a formulation’s transparency. It can also function as an abrasive. In addition, it can act as a carrier for emollients, and may be used to improve a formulation’s skin feel. Spherical silica is porous and highly absorbent, with absorption capabilities roughly 1.5 times its weight. A typical claim associated with silica is oil control. It is found in sunscreens, scrubs, and wide range of other skin care, makeup, and hair care preparations. It has been successfully used in hypoallergenic and allergy-tested formulations.

Definition

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

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].

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

Preparation Products


Silicon dioxide Suppliers

Global( 212)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22631 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 info@tnjchem.com China 2368 55
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 30052 58
SHANDONG ZHI SHANG CHEMICAL CO.LTD
+86 18953170293
+86 0531-67809011 sales@sdzschem.com CHINA 2995 58
Chemwill Asia Co.,Ltd.
86-21-51086038
86-21-51861608 chemwill_asia@126.com;sales@chemwill.com;chemwill@hotmail.com;chemwill@gmail.com CHINA 23979 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28235 58
Haihang Industry Co.,Ltd
86-531-88032799
+86 531 8582 1093 export@haihangchem.com CHINA 9612 58
Hebei Guanlang Biotechnology Co., Ltd.
+8619930501651
whatsapp: +8619930501651 breeduan@crovellbio.com CHINA 2383 58
Cangzhou Wanyou New Material Technology Co.,Ltd
18631714998
sales@czwytech.com CHINA 913 58
Xiamen AmoyChem Co., Ltd
+86 592-605 1114
sales@amoychem.com CHINA 6372 58

View Lastest Price from Silicon dioxide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-04-02 SiO2 Silicon dioxide Aerosil silica Manufacturer; In stock GMP Factory
7631-86-9
US $1.00 / KG 1KG High quality manufacturer TOP 3 largest production factory in China Chemwill Asia Co.,Ltd.
2019-07-21 Silicon Dioxide
7631-86-9
US $1.00 / KG 1KG 99.99% 6000 Ton/Tons per Year Cangzhou Wanyou New Material Technology Co.,Ltd
2018-12-17 Silicon dioxide
7631-86-9
US $1.00 / kg 1kg 99% 100KG career henan chemical co

7631-86-9(Silicon dioxide)Related Search:


Copyright 2017 © ChemicalBook. All rights reserved