Zhishang Chemical

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Zhishang Chemical

Silicon Dioxide Powder CAS 7631-86-9

Molecular Formula: O2Si

Formula Weight: 60.08

ZSpharmac: Silicon Dioxide Powder Supplier

Product Name: Silicon Dioxide Powder
CAS No: 7631-86-9
Purity: 99%

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Basic Info

Product Name:Silicon Dioxide Powder
Other Names:Diethanolamine
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:White Crystal or Colorless Liquid
EINECS No.:203-868-0
Provide:Silicon Dioxide Powder MSDS;
Silicon Dioxide Powder COA

What is Silicon Dioxide Powder ?

Silicon Dioxide Powder is the most abundant of all minerals. Silica, which exists in nature, is called silica, which accounts for about 12% of the total weight of the earth’s crust. Silica has three different crystal forms: quartz, tridymite and cristobalite. Quartz is the most stable at room temperature, and the other two are stable at high temperature. Because they transform into quartz very slowly, they also exist at room temperature. Certain quartz minerals have special names, such as large and transparent quartz crystals called crystals, purple ones with trace impurities called amethysts, light yellow, golden and brown called smoky quartz, and black almost opaque called smoky quartz. Chalcedony, agate, and jasper are gemstone minerals of various colors that are microcrystalline quartz mixed with other substances. Carnelian contains iron oxide and chrysoprase contains magnesium. Red jasper is mixed with finely dispersed goethite (Fe2O3·H2O). Common sand is quartz with impurities. There are a large number of good-quality silica mines in North China, and quartz sandstone is widely distributed in South China. There are crystal mines in Qinghai, Yunnan, Guangdong, Guangxi and Guizhou provinces. The melting point of quartz is 1610°C. Except for fluorine, hydrogen fluoride and hydrofluoric acid, it does not react with halogens, hydrogen halides and inorganic acids. But it is soluble in hot concentrated lye and molten strong alkali or sodium carbonate.

Silicon Dioxide Powder Property

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
Fp 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.
form suspension
pka6.65-9.8[at 20 ℃]
Specific Gravity2.2
color White to yellow
PH5-8 (100g/l, H2O, 20℃)(slurry)
Water Solubility insoluble


Silicon Dioxide Powder Uses

  1. Silicon Dioxide Powder is a moisture-proof adsorbent. It is used for moisture-proofing of food; adsorption of high-molecular healthy protein in fermented items throughout commercial fermentation; drying and also purifying representative of different industrial gases (CARBON DIOXIDE, H2, O2, etc).
  2. Silicon Dioxide Powder is an anticaking agent; putting on hold agent; defoaming representative; carrier; thickener; filter aid, clearing up representative, taste and also fragrance adsorption desiccant for malt beverages, fruit red wine, soy sauce, vinegar, great beverages, and so on. GB 2760-90 states that it is a processing aid.
  3. Silicon Dioxide Powder is widely utilized in industries such as metallurgy, refractories, chemicals, abrasives and also building and construction.
  4. Silicon Dioxide Powder is used for bonding between glass airplanes such as picture tubes, projection tubes, and seeing wave tubes as well as phosphors.
  5. Silicon Dioxide Powder is made use of as an anti-caking representative. It can be used as a powder flavor according to the laws of our country, as well as the maximum usage amount is 80g/kg; it can also be used in milk powder, chocolate powder, egg powder, vegetable fat powder and also instant coffee, and so on, as well as the maximum use quantity is 15.0 g/kg.
  6. Silicon Dioxide Powder is utilized as an enhancing representative for rubber, an anti-settling representative for protecting against plastic movies from bonding, an anti-settling agent for pigments, a matting agent for finishes, a thickness regulator, a pharmaceutical excipient, a catalyst provider, and cosmetics.
  7. Silicon Dioxide Powder is made use of as a reinforcing filler for natural rubber and also artificial rubber, a filler for artificial material, an ink thickener, an anti-sedimentation representative for pigments in paints, a matting agent, a soft polishing agent for cars and metals, and also an anti-settling agent in emulsifiers representative. It can likewise be utilized as a chemical provider and as a filler for lightweight newsprint.
  8. Silicon Dioxide Powder is made use of as a filler for shade television cables, wire casings, as well as rubber clear bases. It is additionally used as a thickener, thixotropic representative, anti-precipitation representative, matting representative, plastic opening representative, fluid drug adsorbent, cosmetics and also paper-making filler.

Silicon Dioxide Powder Chemical Reaction

The chemical properties are reasonably secure. Does not respond with water. It is an acidic oxide as well as does not react with typical acids. Aeriform hydrogen fluoride responds with Silicon Dioxide Powder to develop aeriform silicon tetrafluoride. Responds with warm concentrated strong antacids solution or molten alkali to form silicates as well as water. Respond with different metal oxides at high temperature to create silicates. Utilized in the manufacture of quartz glass, optical tools, chemical vessels, common glass, refractory products, optical fibers, porcelains, and so on. Silicon Dioxide Powder is inactive in nature, it does not engage with halogens apart from fluorine and hydrogen fluoride, hydrogen halide, sulfuric acid, nitric acid, perchloric acid (except hot focused phosphoric acid).
Typical concentrated phosphoric acid (or pyrophosphoric acid) can wear away silicon dioxide at high temperature to develop heteropoly acid, and molten borate or boron anhydride at high temperature can likewise wear away Silicon Dioxide Powder. In view of this home, borate can be utilized It is made use of as a flux in ceramic firing. On top of that, hydrogen fluoride can likewise be an acid that can liquify silicon dioxide to produce hydrofluorosilicic acid that is quickly soluble in water: 6HF+ SiO2= H2SiF6 +2 H2O.
Silicon Dioxide Powder typically does not respond with water, that is, it does not generate silicic acid when it contacts with water, yet silicon dioxide is synthetically defined as the anhydride of silicic acid.
Silicon Dioxide Powder Framework In the temperature series of passion for a lot of microelectronics procedures, the crystallization price of silicon dioxide is negligibly reduced. Although integrated silica is not long-range gotten, it displays a short-ordered framework, which can be thought about to have 4 oxygen atoms at the vertices of a tetrahedron. At the center of the polyhedron is a silicon atom.
In this way, every 4 oxygen atoms are approximately covalently bonded to silicon atoms, pleasing the valence shell of silicon. If each oxygen atom becomes part of two polyhedra, the valence of oxygen is also pleased, and also the outcome is a regular crystal structure called quartz.
In merged silica, particular oxygen atoms, called oxygen linking websites, bond to 2 silicon atoms. Specific oxygen atoms have no oxygen bridges and are adhered to just one silicon atom.
It can be thought about that thermally expanded silica is mainly composed of polyhedral networks with arbitrary positionings. The bigger the section of the oxygenated bridge, the greater the bond of the oxide layer and also the much less prone to damage it will certainly be contrasted to the non-oxygenated bridge website. The ratio of aerobic bridges to anoxic bridges is much greater for dry oxygen oxide layers than for damp oxygen oxide layers.

Production Method of Silicon Dioxide Powder

Hydrochloric acid decomposition method.
Na2O xSiO2+HCl+H2O→SiO2 nH2O+NaCl
Operation method: first, the water glass solution with a relative density of 1.100 (wherein the mass ratio of Na2O and SiO2 is 1:2.4 to 1:3.4, and the concentration is preferably 4% to 10%) and an aqueous solution of sodium chloride with a relative density of 1.060 are mixed. Salt out, then decompose with 31% hydrochloric acid (sulfuric acid can also be used, called sulfuric acid decomposition method), control pH = 6 ~ 9.5, precipitate fine silica gel, rinse with water, dehydrate, dry, crush, and sieve to obtain the precipitate Silicon Dioxide Powder.
carbonization method. Melting silica sand and soda ash at high temperature, dissolving the molten material, introducing carbon dioxide gas (containing 30%-35% CO2) for carbonization and neutralization for 6-8 hours, washing with water, adding sulfuric acid to adjust the pH value to 6-8 for the second washing , dehydrated, dried until the water content ≤ 6%, and crushed in 200-350 mesh to obtain the finished product of precipitated Silicon Dioxide Powder.
Rice husk method. The rice husk is carbonized under the condition of strictly controlling the temperature to remove the organic matter in the rice husk and keep the hydrated silica in the rice husk from being destroyed. The carbonized rice husk is boiled in a certain concentration of sodium carbonate aqueous solution at a certain temperature under normal pressure to dissolve the hydrated silica in the carbonized rice husk, and the dissolution rate can reach 90%. The dissolved hydrated silica is filtered , washed, and spray-dried to obtain a finished product of precipitated silica.

About Products:
If you need Silicon Dioxide Powder, a cosmetic raw material, please contact our service staff directly, and we will provide you with high-quality products at the best price.
As an experienced Silicon Dioxide Powder manufacturer and supplier, ZSpharmac will provide Silicon Dioxide Powder raw materials to customers all over the world for a long time.
Over the years, the company has been adhering to the spirit of “integrity management, strict quality control, customer first”, and has won unanimous praise from domestic and foreign customers.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Cosmetic raw materials
  • Products/Service:Cosmetic raw materials (flavors and fragrances,antioxidant products, moisturizing and hydrating, whitening agents, cosmetic additives)
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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