Silicon dioxide
- CAS No.
- 68855-54-9
- Chemical Name:
- Silicon dioxide
- Synonyms
- KIESELGUHR;SILICONE DIOXIDE;CELITE 545;HYFLO;Hyflow;535;KIESELGEL;KIESELGUR;CELITE 521;FILTER AGENT
- CBNumber:
- CB4199395
- Molecular Formula:
- O2Si
- Molecular Weight:
- 60.084
- MDL Number:
- MFCD00146688
- MOL File:
- Mol file
- MSDS File:
- SDS
- TDS File:
- TDS
| Melting point | >450℃ |
|---|---|
| Density | 0.47 g/cm3 (loose weight)(lit.) |
| bulk density | 300kg/m3 |
| storage temp. | Store at RT. |
| solubility | <0.001g/l |
| form | rod (1/8") |
| color | white |
| PH | >8.5 (25℃, 10% in aq. suspension) |
| Water Solubility | Insoluble in water. |
| Specific Activity | ≤1EU/g (endotoxin) |
| Major Application |
food and beverages general analytical |
| InChI | 1S/O2Si/c1-3-2 |
| InChIKey | VYPSYNLAJGMNEJ-UHFFFAOYSA-N |
| SMILES | O=[Si]=O |
| EPA Substance Registry System | Kieselguhr, soda ash flux-calcined (68855-54-9) |
| UNSPSC Code | 41115711 |
| NACRES | SB.54 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS08 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H372 | |||||||||
| Precautionary statements | P260-P264-P270-P314-P501 | |||||||||
| target organs | Lungs | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves, type P2 (EN 143) respirator cartridges | |||||||||
| Hazard Codes | T,Xn | |||||||||
| Risk Statements | 48/20-49-36/37-36/38-45-36/37/38 | |||||||||
| Safety Statements | 22-36-26-53-45-36/37/39-39 | |||||||||
| WGK Germany | 2 | |||||||||
| RTECS | VV7311000 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 3802 90 00 | |||||||||
| Storage Class | 6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects |
|||||||||
| Hazard Classifications | STOT RE 1 Inhalation | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Silicon dioxide price More Price(69)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | 22140 | Celite? 545 filteraid,treatedwithsodiumcarbonate,fluxcalcined | 68855-54-9 | 1kg | $85.8 | 2026-04-30 | Buy |
| Sigma-Aldrich | 22141 | Celite® 545 AW filteraid,acidwashed,treatedwithsodiumcarbonate,fluxcalcined | 68855-54-9 | 100g | $665 | 2026-04-30 | Buy |
| Sigma-Aldrich | 22140 | Celite? 545 filteraid,treatedwithsodiumcarbonate,fluxcalcined | 68855-54-9 | 5kg | $290 | 2026-04-30 | Buy |
| Sigma-Aldrich | 22138 | Celite? 535 filteraid,fluxcalcined | 68855-54-9 | 1kg | $119 | 2026-04-30 | Buy |
| Sigma-Aldrich | 20199-U | Celite® 545 AW reagentgrade | 68855-54-9 | 454G | $716 | 2026-04-30 | Buy |
Silicon dioxide Chemical Properties, Uses, Production
Chemical Properties
white to off-white powder
Chemical Properties
Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder
Uses
Production of filters, polishes, absorbents, insulators.
Uses
Celite (R) 545 AW (hyflo supercel) was used as stationary phase in purification of fagopyritols using preparative chromatography. Celite (R) 545 AW was used as packing material for fractionating procedure and the fractions were analysed using GC-ECD, GC/ECNI-MS 2 and IC-MS/MS.
Uses
Diatomaceous earth (hyflo supercel) may be used as an adsorbent for column chromatography.
Definition
ChEBI: Silicon dioxide is a silicon oxide made up of linear triatomic molecules in which a silicon atom is covalently bonded to two oxygens.
Application
Hyflo supercel may be used for the separation of mucopolysachharides by electrophoresis. It may be employed as filter aid during the preparation of protein renin isolated from horse plasma.
General Description
Chromosorb W is a diatomite which provides solid support for the packed GC columns. It is suitable for use with polar compounds, due to its low surface area and high inertness.
Health Hazard
Amorphous silica, natural diatomaceous earth, is usually considered to be of low toxicity; however, pure amorphous silica is rarely found.
Flammability and Explosibility
Non flammable
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.
Carcinogenicity
Amorphous silica has been tested for carcinogenicity in a variety of animal studies by a number of routes. Most of the tests were negative or were inadequate primarily because of poorly defined physiochemical characteristics of the silica. The IARC concluded that evidence is inadequate to describe amorphous silica as carcinogenic in either experimental animals or humans. Crystalline silica, however, has been designated by IARC as a probable human carcinogen (category 2A), based on “sufficient evidence” in experimental animals and “limited evidence” in humans.Therefore, although evidence for the carcinogenicity of crystalline silica in humans is unconvincing, certainly from exposures insufficient to cause silicosis, appropriate hazard warnings are obligatory in the United States. These apply to all materials containing 0.1% or more of crystalline silica (quartz, cristobalite, and/or tridymite).
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
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Shaanxi Jianchuang Biotechnology Co., Ltd. | 13335389838 | 3305337057@qq.com | China | 220 | 58 |
| BROFOS NANOTECHNOLOGY(NINGBO)CO ,LTD. | 0574-62615397 17757424292 | brofosnano@foxmail.com | China | 206 | 58 |
| J & K SCIENTIFIC LTD. | 18210857532 18210857532 | jkinfo@jkchemical.com | China | 96815 | 76 |
| Meryer (Shanghai) Chemical Technology Co., Ltd. | 4006356688 18621169109 | market03@meryer.com | China | 40202 | 62 |
| Alfa Aesar | 400-6106006 | saleschina@alfa-asia.com | China | 30103 | 84 |
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
| JinYan Chemicals(ShangHai) Co.,Ltd. | 13817811078 | sales@jingyan-chemical.com | China | 9963 | 60 |
| Shanghai Hanhong Scientific Co.,Ltd. | 021-54306202 13764082696 | info@hanhongsci.com | China | 42917 | 64 |
| Sinopharm Chemical Reagent Co,Ltd. | 86-21-63210123 | sj_scrc@sinopharm.com | China | 9791 | 79 |
| Spectrum Chemical Manufacturing Corp. | 021-021-021-67601398-809-809-809 15221380277 | marketing_china@spectrumchemical.com | China | 9643 | 60 |
Related Questions
Ask a questionView Latest Price from Silicon dioxide manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-09-17 | DIATOMACEOUS EARTH
68855-54-9
|
0.99 | RongNa Biotechnology Co.,Ltd | ||||
 |
2020-01-09 | DIATOMACEOUS EARTH
68855-54-9
|
$1.00 | 1KG | 99.0% | 100kg | Career Henan Chemical Co |
-
- DIATOMACEOUS EARTH
68855-54-9
- 0.99
- RongNa Biotechnology Co.,Ltd
-
- DIATOMACEOUS EARTH
68855-54-9
- $1.00
- 99.0%
- Career Henan Chemical Co
