Quartz distilling flasks are designed for high-temperature distillation, chemical synthesis, and aggressive reagent handling in research and industrial laboratories. These fused silica round bottom boiling flasks deliver exceptional thermal stability and chemical inertness where standard borosilicate glassware cannot perform reliably.
Core Functions & Applications
These fused quartz distillation flasks serve as essential vessels for a wide range of demanding laboratory processes:
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Distillation & Fractionation – Separate liquid mixtures based on boiling points with side-arm configurations for seamless condenser integration.
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High-Temperature Reactions – Safely conduct reactions requiring continuous heating up to 1200°C, far beyond the limits of borosilicate glass.
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Corrosive Chemical Handling – Store and process aggressive acids (e.g., H₂SO₄, HNO₃) and alkalis with minimal risk of ionic leaching or surface degradation.
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Reflux & Heating – Uniform heat distribution from the round-bottom design prevents localized hotspots and ensures stable boiling conditions.
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Analytical Chemistry – Compatible with ASTM D86, D850, and ISO 3405 standard methods for petroleum and liquid fuel distillation.
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Semiconductor & High-Purity Processing – Ultra-low contaminant levels make these flasks suitable for trace-element-sensitive applications.
Material & Construction
Each quartz distilling flask is fabricated from high-purity fused silica (amorphous SiO₂ ≥99.99%), containing minimal additives or impurities. This composition imparts properties that are fundamentally superior to soda-lime or borosilicate glass:
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Thermal Performance: Softening point approximately 1730°C with continuous service up to 1100–1200°C and short-term tolerance to 1400°C. Low coefficient of thermal expansion (~5.5×10⁻⁷/°C) ensures exceptional thermal shock resistance.
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Chemical Inertness: Resistant to most acids, bases, and organic solvents. (Note: Hydrofluoric acid and hot concentrated alkalis may attack fused silica surfaces.)
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Optical Clarity: High transparency across visible and UV spectra allows real-time visual monitoring of reaction progress and liquid levels.
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Purity Grade: ≥99.99% SiO₂ content with minimal metallic contaminants, making the flasks ideal for sensitive analytical work and contamination-critical procedures.
Common alternative names: quartz boiling flasks, fused silica round bottom flasks, quartz glass reaction flasks, high-temperature distillation flasks.
Standard Configurations & Specifications
The table below lists common standard configurations. Custom capacities, neck dimensions, and joint sizes are available upon request.
| Capacity | Neck Configuration | Bottom Type | Typical Application |
|---|---|---|---|
| 25ml – 100ml | Single neck | Round bottom | Small-scale analytical distillation |
| 125ml – 250ml | Single or double neck | Round bottom | ASTM D86 petroleum testing, lab synthesis |
| 300ml – 500ml | Single or multiple neck | Round or flat bottom | Medium-scale distillation, reflux setups |
| 1000ml – 2000ml | Single, double, or triple neck | Round or flat bottom | Pilot-scale reactions, larger volume processing |
| Custom (up to 5000ml+) | 1–4 necks available | Round or flat bottom | Specialized industrial and research applications |
Technical Specifications
| Property | Specification / Typical Value |
|---|---|
| Material Composition | SiO₂ ≥ 99.99% (fused silica / fused quartz) |
| Density | 2.2 g/cm³ |
| Maximum Continuous Service Temperature | 1100–1200°C |
| Short-Term Temperature Tolerance | Up to 1400°C |
| Softening Point | ~1730°C |
| Coefficient of Thermal Expansion (CTE) | ~5.5×10⁻⁷/°C |
| Thermal Shock Resistance | Withstands ΔT > 800°C rapid changes |
| Thermal Conductivity (20°C) | 1.38–1.4 W/m·K |
| Chemical Resistance | Excellent resistance to most acids (except HF) and alkalis |
| Optical Transmission | >90% across visible and UV spectrum |
| Available Joint Types | Standard taper ground glass joints (e.g., 14/20, 19/22, 24/29, 24/40) |
| Neck Options | 1, 2, 3, or 4 necks; vertical or angled configurations |
Quality Standards & Compliance
Our quartz laboratory glassware is manufactured under strict quality control systems and conforms to recognized international standards:
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ISO 9001 – Certified quality management system.
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ISO 17139 – Fused silica glassware compliance.
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ASTM C1410 – High-purity fused silica material specifications.
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USP <661> – Glass container testing for chemical durability and purity.
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ASTM E133 – Distillation equipment specifications.
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ASTM D86 / ISO 3405 – Standard test method for distillation of petroleum products.
Manufacturing facilities maintain rigorous testing protocols including dimensional verification, thermal cycling validation, and chemical purity analysis (ICP-MS) to ensure consistent product reliability.
Performance Validation
Independent laboratory testing confirms the following performance characteristics:
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Thermal Cycling Endurance: Quartz distilling flasks completed 180+ thermal cycles from 1150°C to ambient temperature with zero structural failure or surface crazing.
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Extended Service Life: Comparative testing indicates approximately 30% longer operational lifespan versus borosilicate alternatives under identical high-temperature distillation conditions, reducing replacement frequency and downtime.
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Chemical Inertness Validation: Trace metal analysis (ICP-MS) shows negligible ionic leaching after extended exposure to concentrated acids, ensuring reaction purity in sensitive applications.
Customization & Ordering Information
We supply both standard and fully customized fused quartz distilling flasks to meet specific research and production requirements:
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Custom capacities and dimensions
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Specialized neck configurations (1–4 necks, vertical or angled)
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Non-standard joint sizes and types
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Custom side-arm placement and angle
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Engraved markings and labeling options
No minimum order quantity for standard items. Custom orders subject to quantity requirements.
