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Silicon dioxide
Silicon dioxide

Silicon dioxide

Price USD1.00
Packge 1kg
  • Min. Order:1kg
  • Supply Ability:100KG
  • Time:2019-07-06

Product Details

  • Product NameSilicon dioxide
  • CAS No. 7631-86-9
  • EINECS No.231-545-4
  • MFO2Si
  • MW60.08
  • AppearancesuspensionWhite to yellow
  • Boiling point >100 °C(lit.)
  • Melting point >1600 °C(lit.)
  • density 2.2-2.6 g/mL at 25 °C
  • Water Solubility insoluble
  • storage temp. 2-8°C

AD68

Silicon dioxide Basic information
General Description Uses
Product Name: Silicon dioxide
Synonyms: SILICA GEL 60 PF254 FOR PREPARATIVE LAYE;LICHROSORB SI 100 (10 MYM) 10 G;TLC-SILICA GEL 60 GF254 MEAN PARTICLE SI;LICHROSORB SI 100 (10 MYM) 100 G;SEA SAND EXTRA PURE 5 KG;SILICA GEL 60 GF254 FOR THIN-LAYER CHROM;SILICA GEL 60 PF254 + 366 FOR PREPARATIV;SEA SAND EXTRA PURE 25 KG
CAS: 7631-86-9
MF: O2Si
MW: 60.08
EINECS: 231-545-4
Product Categories: #N/A;Siloxanes;Inorganics;Silica Gels;organofunctional catalyst support;metals scavenging agent;molecular sieves;metal oxide;Mesoporous Materials;Ceramic Science;Materials Science;Metal &;Nanomaterials;New Products for Materials Research and Engineering
Mol File: 7631-86-9.mol
Silicon dioxide Structure
 
Silicon dioxide Chemical 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
Fp  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
PH 5-8 (100g/l, H2O, 20℃)(slurry)
Water Solubility  insoluble
Sensitive  Hygroscopic
Merck  14,8493
Stability: Stable.
CAS DataBase Reference 7631-86-9(CAS DataBase Reference)
NIST Chemistry Reference Silicon(iv) oxide(7631-86-9)
EPA Substance Registry System Silica(7631-86-9)
 
Safety Information
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
WGK Germany  1
RTECS  VV7310000
TSCA  Yes
HS Code  28112200
MSDS Information
Provider Language
Silica English
 
Silicon dioxide Usage And Synthesis
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 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
Definition ChEBI: A silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.
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.
Hazard Not toxic if ingested, inhaled silica dust can cause silicosis; carcinogen.
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
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].
 

Company Profile Introduction

Henan CoreyChem Co., Ltd, based on the original Zhengzhou Cote Chemical Research Institute, be brave in absorbing highly educated talents & overseas returnees; actively responded to Zhengzhou City High-tech Zone Government’s Special Care Policy, reorganized and founded in National University of Science and Technology Park, which is a high-tech, stock enterprise of high-end chemical Custom synthesis;The park was created by the People's Government of Henan Province, and proved by Ministry of Education and the National Science & Technology, taking the construction mode of "many college a park, and common development", mainly depends on Zhengzhou University and Henan University’s scientific research and talent advantage to set up Universities, scientific research institute and enterprise scientific research achievements transformation platform, to make high-tech enterprises incubate,  is the new high-tech talent gathering base, high and new technology industry enterprise radiation base, colleges and universities technological innovation base.
 
Henan Coreychem Co., Ltd, facing global High-tech pharmaceutical raw materials, high complex new type intermediates, fine chemicals custom synthesis, scale-up production and Rare chemicals trade. Corey have well-equipped machine, strong technical force and considerate marketing team service. We also have rich experience advantage in basic research, small scale process development, scale-up, industrial technology development & production and cost control.
 

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career henan chemical co

Henan China
  • Since:2014-12-17
  • Address: No.967,15th Floor,Unit 7, Building 1, No.70 of DianChang Road, High-tech Development Zone, Zhengzho
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