Pyrogenic silica, also known as fumed silica manufactured in a flame pyrolysis process, is a thickening and anti-caking agent capable of enhancing the performance, handling and stability of formulations during all aspects of the manufacturing process. The three-dimensional of pyrogenic silica, or fumed silica, induces viscosity-increasing thixotropic behavior when utilized as a thickening agent or reinforcing filler.

As a leading pyrogenic silica distributor in the United States and throughout North America, you can trust Brenntag to supply a high-quality product backed by a host of valuable business services.


The cosmetics and personal care industry is a primary user of pyrogenic silica. Its light-diffusing abilities make it an excellent choice for various cosmetic products, and it also serves well as a mild abrasive in toothpaste. In addition, it adjusts the flow properties of liquids and facilitates the free flow of powders.

Other industries able to benefit from pyrogenic silica include printing, for the manufacturing of inks, as well as producers of insulating gels, insulation pads, synthetic and natural rubber materials, silicone elastomers and adhesives. Yet another industrial pyrogenic silica application is as a desiccant due to its effectiveness as a drying agent.

toothpaste on a toothbrush

Pyrogenic Silica Chemical Properties

Pyrogenic silica consists of non-porous particles containing microscopic silica droplets fused into chainlike, three-dimensional secondary particles. These then form into tertiary particles, producing a powdery material featuring a high surface area (50–600 m2/g) and low-bulk density (160–190 kg/m3). The powder exhibits viscosity-enhancing properties when used as a thickening agent. Pyrogenic silica shows a space-filling particle structure related to a high surface area and lacking micropores. These characteristics enable fumed silica to act as a free flow additive in powder-like solids, as a thickener in various liquids and as a powerful reinforcing filler in elastomers.

Pyrogenic silica does not pose any health issues to manufacturing personnel or end-users. The Occupational Safety and Health Organization and other regulatory bodies do not list the material as a carcinogen. However, the inhalation of airborne particles can cause respiratory system irritation.

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When you select Brenntag North America, you get a one-stop-shop pyrogenic silicadistributor featuring best-in-class products and services. Based in Reading, PA, we have more than 190 locations throughout North America, which enables us to provide the localized service your company needs to meet its chemical manufacturing requirements.

You can count on Brenntag for custom blending to ensure the product meets your exact specifications, packaging and repackaging services, formulation assistance and just-in-time delivery to help keep your inventory costs under control.

What really sets Brenntag apart from our competitors is our relationship-oriented business approach. Our focus on forming lasting partnerships with our customers has made us one of the most trusted ACES (Adhesives, Coatings, Elastomers, Sealants) distributors in the industry. We work closely with every customer to find a chemical solution that will improve product quality and minimize manufacturing costs. Don’t stress over where to buy pyrogenic silica for your company. Contact Brenntag North America to learn more about the many benefits of making us your chemical supplier.

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