Hydrophilic Amorphous Fumed Silica (K-200)
CAS 112945-52-5
Unsaturated Polyester Resin · Adhesives and Sealants · Printing Inks
- Specific surface area (BET), m²/g
- 200 ± 20
- pH (in 4% dispersion)
- 3,7 – 4,7
- Loss on drying (2 h, 105°C), %
- max 1,0
- Loss on ignition (2 h, 1000°C), %
- max 1,5
Technical Specifications
| Parameter | Value | Method / unit |
|---|---|---|
| Specific surface area (BET), m²/g | 200 ± 20 | — |
| pH (in 4% dispersion) | 3,7 – 4,7 | % |
| Loss on drying (2 h, 105°C), % | max 1,0 | °C |
| Loss on ignition (2 h, 1000°C), % | max 1,5 | °C |
| SiO2 content, % | min 99,8 | % |
| Bulk density, g/l | 30 – 50 | — |
Detailed application areas
Unsaturated polyester resin. Adhesives and sealants. Printing inks. Paints and coatings. Food and cosmetics. HCR and RTV silicone rubber.
Use Cases
- Unsaturated Polyester Resin
- Adhesives and Sealants
- Printing Inks
- Paints and Coatings
- Food and Cosmetics
- Silicone Rubber (HCR/RTV)
Packaging & storage
Packaging
10 kg multi-layer (PE-lined) kraft bag · big-bag on request.
Storage
It is a stable chemical and does not degrade. Store protected from moisture and chemicals; the product is recommended to be used within 2 years.
Transport
Not classified as dangerous goods; standard road and sea transport.
Shelf Life
24 months
Documents
Technical data sheet (TDS)
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Product Information
Hydrophilic Amorphous Fumed Silica (K-200) (SiO2) is an industrial product in the silicon chemicals category, used in Unsaturated Polyester Resin, Adhesives and Sealants. Typical specifications: Specific surface area (BET), m²/g: 200 ± 20; pH (in 4% dispersion): 3,7 – 4,7; Loss on drying (2 h, 105°C), % 1,0. KORKİMYA supplies Hydrophilic Amorphous Fumed Silica (K-200) in 10 kg multi-layer (PE-lined) kraft bag · big-bag on request.. Shelf life: 24 months.
K-200 is a high-purity hydrophilic amorphous fumed silica with a specific surface area of 200 m²/g; it is used for rheology and thixotropy control, reinforcement and viscosity build-up.
- Formula
- SiO2
- CAS
- 112945-52-5
- Category
- SILICON CHEMICALS
Frequently asked questions
What is K-200 fumed silica and what is it used for?
K-200 is a high-purity hydrophilic amorphous fumed silica (SiO2, CAS 112945-52-5) with a specific surface area (BET) of 200 ± 20 m²/g. It is used for rheology and thixotropy control, reinforcement and viscosity build-up in unsaturated polyester resin, adhesives, inks, paints, food/cosmetics and silicone rubber.
Is K-200 the same as other fumed silicas?
K-200 is a 200 m²/g grade hydrophilic fumed silica, a high-purity product with a minimum SiO2 content of 99.8%. It generally offers comparable rheology performance to other hydrophilic fumed silicas in the same 200 m²/g surface-area class; comparing the specification is recommended for a fit check.
How is K-200 stored and what is its shelf life?
K-200 is a stable chemical and does not degrade. Store it protected from moisture and chemicals; its shelf life is 24 months and the product is recommended to be used within 2 years. It is supplied in 10 kg multi-layer (PE-lined) kraft bags, with big-bag available on request.
Is K-200 classified as dangerous goods?
No. K-200 is not classified as dangerous goods and carries no UN number; it ships by standard road and sea transport. The full specification, BET surface area, pH (4% dispersion: 3.7–4.7) and a certificate of analysis are provided by KORKİMYA.
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Last updated: 04/10/2026
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