Name: ZEMSIL FS-200
Brand: ZEMSIL

Question 1

What is ZEMSIL FS-200?

Accepted Answer

ZEMSIL FS-200 (Fumed Silica (Hydrophilic), CAS 112945-52-5) is a ZEMSIL® silicone material. ZEMSIL FS-200 is the industry-standard hydrophilic fumed silica at 200 m²/g, functionally equivalent to Aerosil 200 and CAB-O-SIL M-5. Produced by continuous flame hydrolysis of silicon tetrachloride above 1000°C. Delivers outstanding reinforcement in HTV silicone rubber, thixotropy control in epoxy systems, anti-settling in paints, and flow improvement in powder formulations. Active silanol groups on the surface provide the basis for further modification to produce hydrophobic grades.

Question 2

What is ZEMSIL FS-200 equivalent to?

Accepted Answer

ZEMSIL FS-200 is equivalent to Aerosil 200, CAB-O-SIL M-5, HDK N20 and can be used as a direct drop-in replacement in most formulations.

Question 3

What are the main applications of ZEMSIL FS-200?

Accepted Answer

ZEMSIL FS-200 is used in: Silicone Rubber, Coatings, Adhesives, Pharmaceuticals, Electronics, Cosmetics, Food & Feed.

Question 4

What are the key specifications of ZEMSIL FS-200?

Accepted Answer

BET Surface Area: 200 ± 25 m²/g; Primary Particle Size: ~12 nm; SiO₂ Content: ≥99.8 %; Moisture (105°C, 2h): ≤1.5 %; Ignition Loss (1000°C): ≤1.0 %; pH (4% dispersion): 3.7–4.7; Bulk Density: ~50 g/L

Question 5

What is the CAS number of ZEMSIL FS-200?

Accepted Answer

The CAS number of ZEMSIL FS-200 (Fumed Silica (Hydrophilic)) is 112945-52-5.

ZEMSIL FS-200

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항목	값	단위	시험 방법
BET Surface Area	200 ± 25	m²/g	ISO 9277
Primary Particle Size	~12	nm	—
SiO₂ Content	≥99.8	%	—
Moisture (105°C, 2h)	≤1.5	%	—
Ignition Loss (1000°C)	≤1.0	%	—
pH (4% dispersion)	3.7–4.7	—	—
Bulk Density	~50	g/L	—