How to choose a K-200 (fumed silica) supplier: a buying guide for pyrogenic silica

When choosing a fumed (pyrogenic) silica supplier, check six criteria: verify BET surface area and specification consistency via a CoA, select the hydrophilic grade that fits your application, ask for KKDIK registration and a Turkish SDS, compare local stock against import lead time, request a sample to validate rheology performance, and clarify TRY invoicing and payment terms.

What to look for when choosing a fumed silica supplier

For construction-chemicals and paint/coatings manufacturers, pyrogenic silica sits at the heart of rheology and thixotropy control; the wrong supplier means lot-to-lot variation in body, sag problems and stalled production lines. Evaluate these six criteria when choosing the right supplier:

• Specification consistency: BET surface area, pH, loss on drying/ignition and SiO2 content staying stable lot to lot. Verify this with the certificate of analysis (CoA) issued per lot.
• Grade fit: whether your application needs hydrophilic or hydrophobic fumed silica, and the target surface-area class (e.g. 200 m²/g).
• Regulatory compliance: the product being KKDIK-registered and arriving with a current Turkish Safety Data Sheet (SDS).
• Supply reliability: delivery from local stock versus an import-dependent 8-12 week lead time.
• Ability to validate: a sample and technical support to trial rheology and thixotropy performance in your own system.
• Commercial terms: TRY invoicing, payment terms and suitable packaging (bag or big-bag).

How to choose the right grade: hydrophilic fumed silica and BET surface area

The first distinction in selecting fumed silica is between hydrophilic and hydrophobic grades. Most liquid systems - unsaturated polyester resin, paints, coatings, adhesives and sealants - use the hydrophilic grade for rheology and thixotropy control; its surface silanol groups form a reversible network that flows under shear and builds structure at rest. The second distinction is the BET surface-area class: the 200 m²/g class offers a balanced thickening and thixotropy performance widely used in construction-chemicals and paint/coatings applications.

When comparing suppliers, look at the full specification, not just the product name. The defining values for K-200: BET surface area 200 ± 20 m²/g, pH 3.7-4.7 at 4% dispersion, SiO2 content at least 99.8%, loss on drying max 1.0% and loss on ignition max 1.5%. Hydrophilic fumed silicas in the same 200 m²/g class generally give comparable rheology performance; compare the specification and the CoA to confirm the fit.

Import or local stock? Lead time and cost in fumed silica supply

The most critical distinction in fumed silica supply is whether the product comes from local stock or depends on imports. Import means a long and unpredictable lead time, FX-exposed cost and often missing KKDIK/Turkish SDS documentation. Local stock provides fast dispatch, TRY invoicing and audit-ready documents. The comparison below summarizes the key differences between the two channels:

How is K-200 pyrogenic silica supplied in Turkey?

KORKİMYA delivers K-200 hydrophilic amorphous fumed silica ex-stock from its Istanbul warehouse, with fast dispatch rather than depending on imports. The product is KKDIK-registered; a current Turkish Safety Data Sheet (SDS) accompanies every shipment and a per-lot certificate of analysis (CoA) is provided on request. Invoicing is in Turkish lira (TRY) with payment terms available. K-200 is not classified as dangerous goods, carries no UN number and ships by standard road/sea transport. Packaging is a 10 kg multi-layer (PE-lined) kraft bag, with big-bag available on request.

How to request a K-200 silica price and sample

To get a K-200 quote and sample, simply complete the inquiry form on the product page. State your application (e.g. unsaturated polyester resin, paint/coatings, adhesive), the target rheology behavior, quantity and preferred packaging (10 kg bag or big-bag). KORKİMYA invoices in TRY; the quote and certificate of analysis (CoA) are provided on request. You can validate in your lab with the sample first, then move to a PO.