About

Aerosil 200 is a hydrophilic fumed silica with a specific surface area of 200 m/g. Manufactured by Evonik, its a very fine, white, amorphous silicon dioxide powder created through flame pyrolysis. This process creates microscopic particles that are fused into a complex, branched, three-dimensional structure. This unique structure gives the material its exceptional properties.

Key Properties

• Hydrophilic Nature: As a hydrophilic substance, Aerosil 200 has a strong affinity for water. This property makes it effective as a thickening and gelling agent in liquid systems that contain water or other polar solvents.

• High Surface Area: The "200" in its name refers to its specific surface area, which is approximately 200 m/g. This incredibly high surface area for a given mass is a result of its unique particle structure and is the main reason for its functionality.

• Rheological Control: Aerosil 200 is a highly effective rheology modifier. It controls the viscosity and flow behavior of liquids. It imparts thixotropy, meaning the mixture becomes a gel-like substance at rest but becomes more fluid when shaken or stirred. This is often described as "shear-thinning" behavior.