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Home > Products >  Silica

Silica CAS NO.7631-86-9

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  • Product Details


  • quartz
  • amorphous
  • monospheres

Quick Details

  • ProName: Silica
  • CasNo: 7631-86-9
  • Molecular Formula: SiO2
  • Appearance: White crystalline, black powder, grai...
  • Application: filler, additive, refractory, solar en...
  • DeliveryTime: prompt
  • PackAge: hot-sealed plastic bag/ bottle, carton...
  • Port: Shipping from ShenZhen, Hongkong,
  • ProductionCapacity: 1 Metric Ton/Year
  • Purity: 99%...99.99%; 99.999%
  • Storage: Store in dry, dark and ventilated plac...
  • Transportation: EMS,FedEx, Airport cargo, Ocean contai...
  • LimitNum: 0 Metric Ton


sub/micron to mesh powders (near/spheres, whiskers, flake, fiber, porous) and grain/ball, thin/ thick metal / alloys pieces / parts, thin and thick (particle) film materials /target, and custom-made crystals, substrates/parts.

In the industries and academic communities, Cerametek Materials is a specialty supplier of advanced ceramic, crystal glass, semiconductor, metal, alloy materials and inorganic compounds as raw or funcational materials in size of ultrafine (nano or sub/micron) powders to beads, pieces, and tablets, targets, monocrystallits, wafer and the other varied geometrical forms through manufacturing or development, for sales and export business etc., established in Beijing TongZhou Industry Development Park, China since 2008.

Cerametek Materials products: For a specific product, please search this website or the product page or contact us.
1. Semiconductor materials: II, III, IV, V, VI group compounds (metal Sulfides, Selenides, Tellurides, Arsenides, Antimonide, Phosphide etc.) ; Metals and alloys.
2. (Complex/doped) powders/grains: (1) Oxides; (2) Rare Earth Compounds; (3) Non oxides compounds, Flourides, Carbides, Nitrides, Borides & (4) other inorganics or (5) natural raw materials;
3. The precursors or reagents. and
4. Some pastes/colliods or sintered parts or other workpieces and the related supplies for the industries.

in sizes from few nanometers to micron powder and grain/balls, pieces, tablets, targets, metal or alloy foil, wire, plate, tube, cup, container and other custom-made/casting geometries for ready-use.

Cerametek Materials utilizes the configuration of materials to realize or perform:
a) lubricants like graphite, BN, sulfide, CxF,
b) low wearing through hard surface of carbide, boride, supperalloy etc.;
c) light emission as visional or bright lights (tungsten) as well as colorant (metal oxides etc.), fluorescent (nitride, oxide),
d) electronic emission in battery materials, semiconductor, solar, and so on;
e) magnetic through ferrite, rare earth alloys, etc.;
f) refractory or thermal monitor.
g) corrosion resistance through supperalloys, etc;
h) active materials through nonstoichemitric routine, porous metals, alloys, and oxides;
i) high surface area particle in positive such as nanosphere or negative such as porosity.
j) reinforcement through fiber or whisker such as carbon, ceramic, metal for nano/micron particles;
k) perfection of atom arrangement through monocrystal substrate or vapor deposition thin film;
and much more.

Our proprietary technologies such as Hydro-thermal, Sol-gel, Plasma-, microwave-assisted synthesis, CVD, Zone-melting purification, CIPing, HIPing, Zone melting growth, VGF, Czochralaski, HB, CMP surface engineering etc. are serving academic and industry communities of functional ceramics, crystals and glasses, ICs, energy, Metallurgical, Machanical, Chemical and Bio-industries with customization sometime worldwide.




SiO2, (10, 100nm, 1-3um) -200 mesh, porous


Consensus Reports

IARC Cancer Review: Animal Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1988,p. 209.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1988,p. 209.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

Standards and Recommendations

OSHA PEL: TWA 6 mg/m3
ACGIH TLV: TWA (nuisance particulate) 10 mg/m3 of total dust (when toxic impurities are not present, e.g., quartz <1%)
DFG MAK: 4 mg/m3 as total dust


The Silicon dioxide is an organic compound with the formula SiO2. The IUPAC name of this chemical is dioxosilane. With the CAS registry number 7631-86-9, it is also named Colloidal silicon dioxide. The product's categories are Siloxanes; Inorganics; Silica Gels. Besides, it is a white crystals or powder, which should be stored in a closed cool and dry place.

Physical properties about Silicon dioxide are: (1)#H bond acceptors: 2; (2) Polar Surface Area: 34.14 Å2.

Preparation of Silicon dioxide: this chemical can be prepared through low temperature oxidation (400–450 °C) of silane. 
SiH4 + 2 O2 → SiO2 + 2 H2O

Uses of Silicon dioxide: it is used primarily in the production of glass for windows, drinking glasses, beverage bottles, and many other uses. The majority of optical fibers for telecommunications are also made from silica. It is a primary raw material for many whiteware ceramics such as earthenware, stoneware, porcelain, as well as industrial Portland cement. Silica is a common additive in the production of foods, where it is used primarily as a flow agent in powdered foods, or to absorb water in hygroscopic applications. It is the primary component of diatomaceous earth which has many uses ranging from filtration to insect control. It is also the primary component of rice husk ash which is used, for example, in filtration and cement manufacturing. In its capacity as a refractory, it is useful in fiber form as a high-temperature thermal protection fabric. In cosmetics, it is useful for its light-diffusing properties and natural absorbency. Colloidal silica is used as a wine and juice fining agent. In pharmaceutical products, silica aids powder flow when tablets are formed. Finally, it is used as a thermal enhancement compound in ground source heat pump industry.

When you are using this chemical, please be cautious about it as the following:
It is harmful if swallowed. Besides, this chemical is irritating to eyes, respiratory system and skin. When you are using it, wear suitable gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.

You can still convert the following datas into molecular structure:
(1)SMILES: O=[Si]=O
(2)InChI: InChI=1/O2Si/c1-3-2 
(4)Std. InChI: InChI=1S/O2Si/c1-3-2 

The toxicity data is as follows:


Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LC inhalation > 200gm/m3/1H (200000mg/m3) LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)" National Technical Information Service. Vol. OTS0537735,
rat LCLo inhalation 2190mg/m3/4H (2190mg/m3) LUNGS, THORAX, OR RESPIRATION: DYSPNEA National Technical Information Service. Vol. OTS0537804,
rat LDLo oral 5gm/kg (5000mg/kg)   National Technical Information Service. Vol. OTS0537804,


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