Precipitated Silica

The chemical compound precipitated silica is a form of synthetic amorphous silicon dioxide produced by precipitation from a solution containing silicate salts. It appears as a white, fluffy, and fine powder, known for its high surface area and absorbent properties. It is widely used in rubber, food, pharmaceutical, and personal care industries.

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Description

Product name: precipitated silica

Cas No	112926-00-8.
Formula	SiO₂
Character	White, odorless, fine powder, insoluble in water and alcohol, but dispersible in water.
Molecular Weight	60.08
Packaging	20 KG and 25 KG Bags We also offer customized packaging solutions tailored to meet specific client needs, including: Private labeling Custom bag sizes and materials Palletization and shrink-wrapping Bulk packaging on request
Storage	Store in a tightly closed container, in a cool, dry, and well-ventilated area. Protect from moisture and contamination.
Industries	Rubber & Tire Industry: Food Pharmaceuticals Personal Care & Cosmetics Coatings & Paints Agriculture & Animal Feed Plastics & Adhesives

APPLICATIONS OF PRECIPITATED SILICA:

Precipitated silica is used as an agent to improve the mechanical properties of rubber.

Precipitated silica is used as an agent to improve the mechanical properties of silicones.

Precipitated silica is used as a defoamer in paper industry.

Precipitated silica is used in the preparation of separators in lead acid batteries.

Precipitated silica is used to adjust viscosity and matting agents for coating industry.

Precipitated silica is used as grinder agent in toothpastes.

Precipitated silica is used as dehumidifier.

Precipitated silica is used as an anti-caking agent in food, farming and fire extinguishers.

Difference Between Fumed Silica & Precipitated Silica & Silica Fume

Fumed silica and precipitated silica are both synthetic amorphous silica, but they are different in many properties. we will explain their difference in 3 main aspects.

1, the manufacturing process

Fumed silica is manufactured in the pyrogenic process. It's synthesized from the hydrolysis of high purity silane in a flame of oxygen and hydrogen at a very high temperature.

While Precipitated silica is manufactured in a wet-chemical process. It is produced by the controlled neutralization of dilute sodium silicate (water glass).

2, chemical properties

Fumed silica has a high specific surface area & small particle size. The aggregates size of fumed silica is 150-300 nanometers, it has 99.8% of silica content, and low moisture content. While precipitated silica is 1-100 micron meters, around 90% silica content and high moisture content.

Fumed silica, that is amorphous silica produced in the flame method from silica, is NOT the same as silica fume. The average particle size of fumed silica is 7-40 nm. while the average particle size of silica fume is 0.1-0.15 μm.

3, product functions

Fumed silica has better performance in thickening, thixotropy, sag resistance, reinforcement and caking resistance. While precipitated silica is mainly used as a reinforcing agent for rubbers or friction agent in toothpaste.

Fumed Silica	VS	Precipitated Silica
150-300 Nano meter	AGGREGATES SIZE	1-100 Micron meter
＞99.8%	SILICA CONTENT	＞90%
90-400㎡/g	SPECIFIC SURFACE AREA	50-600 ㎡/g
Low	MOISTURE CONTENT	High
Fumed silica is synthesized from the hydrolysis of high purity silane in a flame of oxygen and hydrogen at a very high temperature.	MANUFACTURING PROCESS	Precipitated silica is produced by the Controlled neutralization of dilute sodium silicate (water glass) by either concentrated sulfuric, hydrochloric or carbonic acids.
High specific surface area, small particle size	FEATURE	Low specific surface area, large particle size
Has better performance in thickening, thixotropy, sag resistance, reinforcement, caking resistance; mainly used for industries that need high transparency, high purity & small surface area.	FUNCTIONS	Precipitated silica is mainly used as natural rubber and synthetic rubber reinforcing agent, friction agent in toothpaste.
Competitive price with international brand	PRICE	Lower than fumed silica

Dalian J&C Prosperous Trade Co., Ltd manufactures more than 10 grades of hydrophilic and hydrophobic fumed silica for your special choice. For product TDS, MSDS or sample-testing, price quotation, please check Datasheet or leave message to us.

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