Technical Specifications

Properties and Test Methods	Unit	Typical Value	Standardization
Specific surface area (BET)	m²/g	200 ± 25	GB/T 10722
pH value (in 4% dispersion)	–	3.6 ~ 4.5	GB/T 1717
Loss on drying (2h @ 105°C)	Wt%	≤ 1.5	GB/T 5211.3
Loss on ignition (2h @ 1000°C, based on dried material)	Wt%	≤ 2.5	GB/T 20020
Sieve residue (45 μm)	%	≤ 0.05	GB/T 5211.14
Silica content (ignited material)	Wt%	≥ 99.8	GB/T 20020
Tamped density (dried material)	g/L	40 ~ 60	GB/T 5211.4
Carbon content (dried material)	Wt%	≤ 0.2	GB/T 20020

Application Suggestions

Silicone Sealants

Acts as a high-performance rheology modifier. It provides exceptional thixotropy and sag resistance in RTV sealants, ensuring long-term stability in vertical joints and construction bonding.

Coatings & Paints

Engineered for anti-settling and anti-sagging in industrial coatings. It enhances the hydrophobic (water-repellent) barrier of exterior paints, significantly improving film durability and pigment suspension.

Li-ion Batteries

Essential for thermal management and structural safety in electric vehicle batteries. It serves as a specialized additive in electrolyte gels and separator coatings to maintain ionic conductivity while preventing thermal runaway.

Cosmetics

A high-purity thickening and opacifying agent for personal care formulations. It refines the texture of creams and lotions, providing a premium matte finish and improved skin feel.

Food & Pharma

A reliable anti-caking and free-flow agent. It ensures consistent powder flowability and prevents clumping in sensitive pharmaceutical excipients and food-grade powders during storage.

Technical Support & FAQ: SEMISIL 200

Q1: What are the key features and applications of SEMISIL 200?

SemiSIL 200 Fumed Silica is a high-purity hydrophilic additive designed for:

Core Functions: Anti-tacking Agent, thixotropy, and anti-settling.
Key Features: Uniform particle size, exceptional transparency, and chemical purity.
Primary Applications: Cosmetics, powder coatings, Pharmaceutical Excipient.

Q2: How does SEMISIL 200 compare with SEMISIL 150, 300 and 380?

The primary distinction is the Specific Surface Area (BET), which determines thickening efficiency and dispersibility:

SEMISIL 150 (140 – 160 m²/g): Superior dispersibility; ideal for low-viscosity systems.
SEMISIL 300 (290 – 320 m²/g): Maximum thickening power; requires high-shear dispersion.
SEMISIL 380 (370 – 390 m²/g): Achieve exceptional optical clarity for liquid silicone rubber (LSR).

Q3: What factors influence the pricing of SemiSIL 200?

Pricing is driven by market dynamics and technical requirements:

Production Costs: Raw material (SiCl₄) fluctuations and energy consumption.
Quality Standards: Strict control of pH stability and Sieve Residue.
Logistics: Order volume, shipping distance, and vacuum-densified bags.

Q4: What are the typical lead times and payment terms?

We ensure efficient global supply through professional logistics:

Lead Time: Typically 7–14 days (Annual supply volume: 15,000 tons).
Payment Terms: Flexible options including T/T, L/C at sight, and D/P.
Sample Support: Free samples (200g–1kg) available for R&D; evaluation.

Packing & Storage Information

20′ FCL Container

180kg/pallet, 10 pallets, 1.8 Metric Tons

40′ HQ Container

220kg/pallet, 20 pallets, 4.4 Metric Tons

Storage Conditions

SEMISIL® 200 should be stored in closed containers under dry conditions and protected from volatile substances. The product should be used within 2 years after manufacturing to ensure optimal performance.