Silicic acid
- CAS No.
- 7699-41-4
- Chemical Name:
- Silicic acid
- Synonyms
- HYDRATED SILICA;PRECIPITATED SILICA;bio-sil;Silicic;SILICA ACID;Kieselsre;metasilicic;kieselsaure;Kieselsre,E551;metasilicicaci
- CBNumber:
- CB7431304
- Molecular Formula:
- H2O3Si
Lewis structure
- Molecular Weight:
- 78.1
- MDL Number:
- MFCD00054122
- MOL File:
- 7699-41-4.mol
- MSDS File:
- SDS
| Melting point | 1704℃ |
|---|---|
| solubility | insoluble in H2O; soluble in HF |
| form | powder |
| color | White |
| PH | pKa1= 9.65, pKa2 = 13.09(25℃) |
| Dielectric constant | 2.0(Ambient) |
| InChI | 1S/H2O3Si/c1-4(2)3/h1-2H |
| InChIKey | IJKVHSBPTUYDLN-UHFFFAOYSA-N |
| SMILES | O[Si](O)=O |
| CAS DataBase Reference | 7699-41-4(CAS DataBase Reference) |
| EWG's Food Scores | 1 |
| FDA UNII | 4OI8D3YOH1 |
| EPA Substance Registry System | Silicic acid (H2SiO3) (7699-41-4) |
| Cosmetics Info | Hydrated Silica |
| UNSPSC Code | 23201100 |
| NACRES | SB.54 |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H319-H335 | |||||||||
| Precautionary statements | P261-P264-P271-P280-P304+P340+P312-P305+P351+P338 | |||||||||
| target organs | Respiratory system | |||||||||
| PPE | dust mask type N95 (US), Eyeshields, Gloves | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 36/37 | |||||||||
| Safety Statements | 22-26-36 | |||||||||
| OEB | B | |||||||||
| OEL | TWA: 6.0 mg/m3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | VV8853000 | |||||||||
| TSCA | TSCA listed | |||||||||
| Storage Class | 11 - Combustible Solids | |||||||||
| Hazard Classifications | Eye Irrit. 2 STOT SE 3 |
|||||||||
| NFPA 704 |
|
Silicic acid price More Price(10)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | SIL350 | Silicic acid BioReagent, suitable for column chromatography, 100-200 mesh (75 - 150 μm) | 7699-41-4 | 100g | $154 | 2026-04-30 | Buy |
| Sigma-Aldrich | SIL350 | Silicic acid BioReagent, suitable for column chromatography, 100-200 mesh (75 - 150 μm) | 7699-41-4 | 1kg | $799 | 2026-04-30 | Buy |
| Ambeed | A1459352 | Silicic acid AR | 7699-41-4 | 25g | $11 | 2026-06-05 | Buy |
| Ambeed | A1459352 | Silicic acid AR | 7699-41-4 | 100g | $14 | 2026-06-05 | Buy |
| Ambeed | A1459352 | Silicic acid AR | 7699-41-4 | 500g | $26 | 2026-06-05 | Buy |
Silicic acid Chemical Properties, Uses, Production
Description
Silicic acid is the general name that refers to the group of chemical compounds of the element hydrogen, silicon, and oxygen with the formula [SiOx(OH)4-2x]n. H4SiO4 is the most predominant form. Silicic acid is a hydrated form of silicon dioxide. It belongs to the family of Miscellaneous Silicates. These are inorganic compounds in which the largest metallic oxoanion is silicate, to which either no atom or a non metal atom is bonded. Silicic acid is contained in many foods, such as grain, fruit and vegetables (borage). It is commonly used in the manufacture of toothpastes and as a stationary phase for chromatography.It is utilized for the manufacture catalyst and catalyst carrier. It is involved in tungsten filament production as chemical reagent and flux. Further, it is used for oil and wax decoloring.
Chemical Properties
Amorphous silica, the noncrystalline form of SiO2, is a transparent to gray, odorless, amorphous powder
Uses
Laboratory reagent and reinforcing agent in rubber.
Uses
Silicic acid is used in protein chromatography. Silicic acid has been used in a study to demonstrate the anti-biofilm potential of a glycolipid surfactant produced by a tropical marine strain of Serratia marcescens. Silicic acid has also been used to study the antioxidant activity of fresh and processed Jalapeno and Serrano peppers.
Definition
The jellylike precipitate obtained when sodium silicate solution is acidified. The proportion of water varies with the conditions of preparation and decreases gradually during drying and ignition, until relatively pure silica remains. During drying the je
Biochem/physiol Actions
Silicic acid polymers are employed in water treatment systems, drug encapsulation cum delivery and for soluble nanoparticle generation. Silicic acid interacts with aluminum and reduces its bioavailability. It is an effective antidote for aluminum poisoning.
Safety Profile
An inhalation hazard. Poison by intravenous route. An eye irritant and nuisance dust. Questionable carcinogen. Mutation data reported. See also other silica entries and SILICATES
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.
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.
Silicic acid Preparation Products And Raw materials
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9407 | 55 |
| Energy Chemical | 400-0056266 | sales8178@energy-chemical.com | China | 44850 | 61 |
| JinYan Chemicals(ShangHai) Co.,Ltd. | 13817811078 | sales@jingyan-chemical.com | China | 9963 | 60 |
| Maya High Purity Chemicals | +86 (573) 82222445 (0)18006601000 452520369 | sales@maya-r.com | China | 11693 | 57 |
| Chengdu HuaXia Chemical Reagent Co. Ltd | 400-1166-196 13458535857 | cdhxsj@163.com | China | 13323 | 58 |
| Shanghai Macklin Biochemical Co.,Ltd. | 15221275939 15221275939 | shenlinxing@macklin.cn | China | 15775 | 55 |
| Shanghai Yongye Biotechnology Co., Ltd. | 86-021-61559134 15921386130 | 3423497944@qq.com | China | 8135 | 55 |
| Hubei Jusheng Technology Co.,Ltd | 027-59599241 18871490274 | 1400878000@qq.com | China | 9506 | 58 |
| Chizhou Kailong Import and Export Trade Co., Ltd. | xg01_gj@163.com | China | 9413 | 50 | |
| Sigma-Aldrich | 021-61415566 800-8193336 | orderCN@merckgroup.com | China | 51389 | 80 |
View Latest Price from Silicic acid manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2025-06-27 | Silicic acid
7699-41-4
|
1KG | 99% | 500000kg | Hebei Chuanghai Biotechnology Co., Ltd | ||
 |
2025-06-20 | Silicic acid
7699-41-4
|
$26.00-60.00 | 1kg | 0.99 | 20 tons | Hebei Yanxi Chemical Co., Ltd. | |
 |
2025-02-13 | silicic acid
7699-41-4
|
$1.00 | 1g | 0.98 | 1000 | Apeloa production Co.,Limited |
-
- Silicic acid
7699-41-4
- $0.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Silicic acid
7699-41-4
- $26.00-60.00
- 0.99
- Hebei Yanxi Chemical Co., Ltd.
-
- silicic acid
7699-41-4
- $1.00
- 0.98
- Apeloa production Co.,Limited
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