Market overview

Fumed (pyrogenic) silica (CAS 112945-52-5) is made by burning silicon tetrachloride in a hydrogen flame, giving a very fine, high-surface-area powder. It is used to reinforce silicone rubber, control rheology in coatings, adhesives, sealants and composites, and as a free-flow and carrier agent in pharmaceuticals and food. The market is concentrated, and Evonik (AEROSIL) is the clear leader.

The question this report answers
How will fumed silica supply evolve as Evonik, Cabot and Wacker face Chinese growth and silicone demand changes?

Market Krystal preliminary estimate (2025)
GMI values fumed silica at USD 1.72 bn (2025). We use USD 1.6-1.9 bn. Confidence grade B: one published estimate, checked against volumes or prices.

Market dynamics
– Demand: silicone elastomers (28%), coatings and inks (23%), adhesives, batteries
– Supply: Evonik about 35%, Cabot 12%, Wacker 10% (GMI)
– Price and margin: SiCl4 feedstock and energy
– Regulation: occupational dust rules

Key figures at a glance (third-party, cited)
– Fumed silica market: USD 1.72 bn (2025), USD 1.81 bn (2026) to USD 2.78 bn by 2035 at about 4.9% CAGR (Global Market Insights)
– Shares 2025: Evonik about 35%, Cabot about 12%, Wacker about 10%, Tokuyama about 6%, OCI about 5%; top five about 68% (Global Market Insights)
– Applications 2025: silicone elastomers 28%, paints, coatings and inks 23%; Asia-Pacific 46.9% of demand (Global Market Insights)

Recent developments among key stakeholders
– Sep-Oct 2026: BASF made a non-binding offer for Evonik valued at about EUR 10.3 bn (about EUR 22 per share); Evonik rejected it as too low, BASF may raise it and is courting RAG-Stiftung (about 43% holder); on 22 Oct 2026 BASF pledged no operational dismissals until 2032 in a combination (PlasticsToday)

What this means for the market
A BASF-Evonik combination would put this product under new ownership or into an antitrust remedy sale. Bidders, banks, competitors and customers all need an independent, product-level view of capacity, share and pricing now.

How published estimates compare
Global Market Insights provides a usable share table, which shows Evonik at about three times the next competitor. Market Krystal adds plant-level capacity, hydrophilic vs. hydrophobic grade pricing and the silicon tetrachloride feedstock link to the silicones and polysilicon industries.

Strategic scenarios to 2047
– Base: silicones grow with electronics, EVs, construction and healthcare; Chinese siloxane capacity keeps monomer prices low.
– Constrained supply: silicon-metal shortages, energy costs and Western closures (such as Dow Barry) tighten non-Chinese supply.
– Technology transition: EU limits on cyclic siloxanes and platinum-free curing chemistries reshape demand by grade.
The swing factor for Fumed silica is silicone elastomer and battery demand. Signposts: Chinese DMC prices, silicon-metal output, EU siloxane rules, platinum prices.

What this report delivers
Annual volume (tonnes) and value (USD) for 2026-2035, segmented by type: hydrophilic, hydrophobic (surface-treated); application: silicone rubber, coatings and inks, adhesives and sealants, composites, pharma and food, batteries; region: Asia-Pacific, Europe, North America. Each segment is backed by a producer capacity table, price benchmarks for 2020-2025 by grade and region, trade-flow analysis and a supplier risk map. Companies assessed include Evonik, Cabot, Wacker Chemie, Tokuyama, OCI. The 2036-2047 outlook uses three explicit scenarios (base, constrained supply and technology transition) rather than a single extrapolated curve.

Who uses this report
Producers, large buyers, commodity traders and chemical-sector investors.

Why our approach is evidence-based
Most CAS-level market listings publish a single number with no audit trail, and we regularly find figures that contradict their own growth rates or exceed the size of the market they sit inside. Market Krystal works the other way round. We start from physical evidence: plant capacities, production and trade data, company disclosures, regulatory texts and price records. We build volume and price separately and only then compute value. Every third-party figure is cited, every Market Krystal estimate is labelled with its method and a confidence grade, and conflicts between sources are shown rather than hidden. Confidence grades: A = two or more independent sources agree, or government or company data; B = one published estimate checked against volumes or prices; C = no reliable published figure, so the range is built from stated assumptions and narrowed in the full report.

Methodology and delivery
Prepared by the Market Krystal Chemicals Research Team. Each report is built around the buyer’s question: after purchase, a short scope confirmation fixes the priority regions, companies and applications, and the report is delivered within 5-7 business days with the Excel model behind every estimate, so buyers can audit and change the assumptions.

The purchased delivery includes the PDF report, Excel datasets and customization around the buyer’s priority region, company set, application or commercial question.

What this research answers

The study connects production routes, named suppliers, applications, regional demand, trade, pricing drivers and commercial opportunities for this CAS number. Detailed estimates and company analysis remain inside the purchased report.