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:

Applications of Precipitated Silica

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.

• 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.