Shandong Aure Chemical Co., Ltd.

Precipitated Silica CAS 7631-86-9

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Precipitated Silica CAS 7631-86-9

Synonyms: Hydrated Silica; Silica Acid; Synthetic Amorphous Silica; Silicon Dioxide (Amorphous); SiO2 (Amorphous, Precipitated); Colloidal Silica (Precipitated); White Carbon Black

Shandong Aure Chemical Co., Ltd. is one of the leading suppliers of Precipitated Silica in China and also one of the manufacturers of this product.

We can provide customized requirements in terms of product purity, packaging specifications, and other aspects.

Please contact us to obtain the latest product information.

Product Details

Discover Aure Chemical's Premium Precipitated Silica

Precipitated Silica is a synthetic, amorphous form of silicon dioxide (SiO₂) that is manufactured through a wet chemical process, typically by the precipitation of a silicate solution with an acid. Unlike fumed silica, it features a more open, porous structure with a significant number of surface hydroxyl groups. It presents as a white, finely divided powder with high specific surface area and controllable particle size, making it a highly versatile functional filler and additive across numerous industries.


Basic Information of Precipitated Silica

CAS No.:7631-86-9 (Commonly used for Amorphous Silica, including Precipitated Silica. Note: Other CAS numbers like 112926-00-8 or 10279-57-9 may also refer to specific forms or hydrated silica, but 7631-86-9 is broadly recognized.)
EC No.:231-545-4
Linear Formula:SiO₂
Molecular Weight:60.08
Appearance:White, finely divided powder
Melting Point:>1600 °C(lit.)
Boiling point:>100 °C(lit.)
Density:2.2-2.6 g/mL at 25 °C
Particle Size & Surface Area:Available in various grades with controlled particle sizes and specific surface areas to suit diverse applications.
Purity:High SiO₂ content, typically >90% on a dry basis.
Functionality:Contains silanol (Si-OH) groups on its surface, allowing for chemical interactions and modifications.
Thickening & Thixotropy:Effective rheology modifier in liquid systems.
Reinforcement:Excellent reinforcing filler in elastomers.
Abrasion & Polishing:Can provide mild abrasive properties.
Adsorption:Good absorption capacity for liquids and oils.
Chemical Structure: cas-7631-86-9.jpg

Applications

Precipitated Silica's unique properties make it an indispensable additive, enhancing performance and functionality in a broad spectrum of industries:

  • Rubber Industry (Tires & Non-Tire):

    • Primary reinforcing filler in "green tires" (low rolling resistance tires) to improve grip, reduce fuel consumption, and enhance wet traction.

    • Used in industrial rubber products, footwear (soles), and mechanical rubber goods to boost tear strength, tensile strength, and abrasion resistance.

  • Paints, Coatings, and Inks:

    • Acts as a thickener and thixotropic agent to control viscosity, prevent settling of pigments, and improve sag resistance.

    • Provides matting effects to achieve desired gloss levels in coatings.

    • Improves scratch resistance and adhesion.

  • Adhesives and Sealants:

    • Functions as a rheology modifier, improving slump resistance and workability.

    • Enhances the mechanical strength and cohesive properties of the final product.

  • Food and Feed Industries:

    • Used as an anti-caking agent for powdered food products (e.g., spices, instant coffee, powdered milk) to prevent agglomeration and improve flowability.

    • Serves as a carrier for liquids, essential oils, and flavors in powdered formulations.

  • Oral Care (Toothpaste):

    • Functions as a mild abrasive and cleaning agent to remove plaque and stains without damaging tooth enamel.

    • Also acts as a thickener and helps control the consistency of toothpaste formulations.

  • Plastics Industry:

    • Improves mechanical properties, transparency, and anti-blocking characteristics in plastic films.

  • Paper Industry:

    • Used as a filler and coating pigment to improve opacity, brightness, and printability.


Why Choose Aure Chemical's Precipitated Silica?

By partnering with Aure Chemical for your Precipitated Silica needs, you gain access to:

  • Superior Quality & Purity: We provide precipitated silica that adheres to rigorous purity and performance standards, ensuring consistent and optimal results in your end products.

  • Tailored Grades: Our portfolio includes various grades with different particle sizes and surface areas, allowing you to select the perfect match for your specific application requirements.

  • Consistent Performance: Our stringent quality control protocols guarantee the reliability and batch-to-batch consistency you expect.

  • Reliable Supply Chain: Benefit from our robust production capabilities and efficient logistics, ensuring timely and secure delivery to support your manufacturing schedules.

  • Expert Technical Support: Our knowledgeable team is ready to provide in-depth technical information and guidance to help you optimize the use of precipitated silica in your formulations.



Packaging, Transportation & Storage Solutions


At Aure Chemical, we understand the critical importance of rigorous packaging, transportation, and storage for chemical products. To ensure the safety and integrity of the products you purchase, and to comply with international and national regulations, we provide the following general guidelines. Please note that each specific product has its own Safety Data Sheet (SDS), which contains the most detailed and authoritative information on packaging, transportation, and storage. We strongly advise you to consult and strictly adhere to the SDS for the respective product.

I. Packaging SolutionsII. Transportation SolutionsIII. Storage Solutions

We utilize various UN (United Nations) certified packaging containers based on the chemical nature, hazard class, and transportation requirements of our products. Common packaging types include, but are not limited to:

  • Steel Drums: Suitable for a wide range of liquid and solid products, especially flammable liquids.

  • Plastic Drums/Jerricans: Primarily used for corrosive liquids like acids and bases, or substances incompatible with metal.

  • Composite Drums: Combine the corrosion resistance of a plastic inner liner with the strength of a steel or fiber outer shell.

  • IBCs (Intermediate Bulk Containers): Often referred to as "Tote Bins" or "Cubic Tanks," these are used for larger volumes of liquid or solid dangerous goods, offering efficient storage and transport solutions.

  • Lined Bags or Fibre Drums: Primarily used for powdered or granular solids.

  • Glass Bottles: Typically used as inner packaging for small quantities of high-purity or specialized chemicals, requiring additional absorbent material and sturdy outer packaging (e.g., wooden crates, fiberboard boxes).

  • Steel Cylinders: Specifically designed and constructed as pressure vessels for the storage and transport of compressed, liquefied, or dissolved gases. Available in various capacities and pressure ratings, they are built to withstand high internal pressures and ensure the safe containment of gaseous substances.

All packaging undergoes stringent testing and complies with UN packaging performance levels to ensure product safety under normal transport conditions.

We strictly adhere to international and regional regulations for the transport of dangerous goods, ensuring full compliance and safety from our facility to your delivery point.

  • Sea Freight (IMDG Code): We strictly comply with the International Maritime Dangerous Goods (IMDG) Code, using UN-certified containers and ensuring proper dangerous goods declaration, marking, and stowage.

  • Air Freight (IATA DGR): We follow the International Air Transport Association (IATA) Dangerous Goods Regulations, which impose the strictest requirements for packaging, labeling, documentation, and quantity limitations.

  • Road/Rail Transport (ADR/RID & Local Regulations): We comply with the European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR), the Regulations concerning the International Carriage of Dangerous Goods by Rail (RID), and specific national/regional regulations to ensure safe land transport.

Regardless of the transport mode, we will provide the following essential documentation:

  • Safety Data Sheet (SDS/MSDS): Provides product hazard information, safe handling guidelines, emergency measures, etc.

  • Dangerous Goods Declaration (DGD): Detailed information on dangerous goods, packing group, UN number, etc., for carriers and relevant authorities.

  • Other Necessary Certifications or Documents: Such as Certificates of Analysis (COA).

Upon receiving your shipment, please carefully verify the integrity of the packaging and the label information.

Proper storage is crucial for maintaining product quality and ensuring operational safety. The following are general storage principles:

  • Dedicated Areas: Dangerous chemicals should be stored in designated warehouses or areas that meet safety standards, away from residential zones and densely populated areas.

  • Segregated Storage: Strictly classify and segregate products according to their hazard class to prevent incompatible substances from being stored together and causing dangerous reactions (e.g., acids and bases separated, flammables away from oxidizers).

  • Good Ventilation: Storage areas should maintain good natural or forced ventilation to prevent the accumulation of hazardous gases or vapors.

  • Temperature & Humidity Control: Control the temperature and humidity of the storage environment according to the recommendations in the SDS. Avoid direct sunlight and extreme temperatures.

  • Fire and Explosion Prevention: Storage areas for flammable and explosive products should be equipped with adequate fire-fighting equipment, prohibit open flames, and ensure electrical equipment meets explosion-proof standards.

  • Clear Labeling: All storage containers and areas should have clear, conspicuous hazard labels and warning signs.

  • Spill Response: Storage areas should be equipped with appropriate spill response equipment and materials, and personnel should be familiar with emergency procedures.

  • Regular Inspections: Periodically inspect the integrity of storage containers to ensure no leaks or damage, and verify label information.

  • Away from Food and Drinking Water: Avoid cross-contamination.

Should you have any questions regarding the packaging, transportation, or storage of specific products, or require a customized solution, please do not hesitate to contact us.




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