Quartz Lab Glassware

-- Steady & Reliable Manufacturer --

Quartz lab glassware sits a step above borosilicate in terms of both performance and price, and we manufacture it specifically for applications where borosilicate 3.3 isn't quite enough — usually because of extreme temperature requirements, UV transmission needs, or very high chemical purity demands. Quartz glass (fused silica) has a coefficient of thermal expansion roughly ten times lower than borosilicate, which means it tolerates far more aggressive thermal cycling, including direct flame contact and rapid quenching, without cracking.

At Shanghai Heqi, quartz glassware is produced in smaller, more specialized batches than our standard borosilicate lines, since the forming temperatures involved (well above 1,600°C) require different equipment and more experienced glassblowing technique — this is where our in-house glass workshop and R&D team, who also design our custom reactor and distillation components, get directly involved rather than relying purely on mechanized processes. This tag groups together every quartz product across our catalog — vessels, tubes, specialty flasks, and components used in UV analysis — so buyers who specifically need fused silica rather than borosilicate can find everything in one place instead of checking each product page individually.

Because quartz fabrication is slower and more labor-intensive than mechanized borosilicate production, we generally recommend buyers confirm their actual technical requirement — continuous-use temperature, UV wavelength range, or trace-metal purity — before specifying quartz by default, since it's a more expensive material to over-specify unnecessarily.

Key Advantages of Quartz Glassware

Quartz isn't a wholesale upgrade over borosilicate — it's a specialized material that solves specific problems, and it's worth knowing which ones before paying the premium for it.

Extreme temperature tolerance — usable continuously up to around 1,100°C and can survive brief exposure well beyond that, far past what borosilicate can handle.
Very low thermal expansion — around 0.55×10⁻⁶/K, roughly six times lower than borosilicate 3.3, which means it survives thermal shock that would shatter ordinary lab glass, including rapid quenching from red-hot to room temperature.
UV transmission — unlike borosilicate, which blocks most UV wavelengths below about 300nm, quartz transmits UV light effectively, which is why it's essential for UV-Vis spectroscopy cells, UV analyzers, and photochemistry work.
High chemical purity — very low levels of leachable metal ions, which matters for trace analysis and high-purity synthesis where even borosilicate's low leaching rate isn't low enough.
High mechanical and dielectric strength — holds up well under vacuum and in high-temperature furnace or muffle applications.

The trade-off is cost and, in some geometries, brittleness to sharp mechanical impact — so for general-purpose lab work, our borosilicate 3.3 lab glassware remains the more practical default. We'd rather steer a buyer toward the cheaper, more durable option when it genuinely meets their process requirements than sell quartz where it isn't actually needed, since a mismatched material choice usually shows up as a support request later on.

Industries and Applications

Quartz glassware tends to show up wherever a process pushes past what standard lab glass can reliably handle, which narrows the field but makes the use cases fairly consistent across industries.

UV-Vis spectroscopy and analytical chemistry — quartz cuvettes and cells are effectively mandatory for accurate readings below 300nm, since borosilicate would absorb the relevant wavelengths.
Photochemistry and UV curing research — reaction vessels need to transmit UV light to the reaction mixture, which only quartz reliably does at scale.
High-temperature furnace and muffle furnace work — quartz tubes and boats withstand sustained high heat that would deform or crack borosilicate.
Semiconductor and electronics-adjacent research — high-purity quartz avoids introducing metal ion contamination into sensitive processes.
Petrochemical and materials testing labs — used where flame contact or extreme thermal cycling is part of the standard testing procedure.
Pharmaceutical and chemical R&D — occasionally specified for high-purity synthesis steps where trace metal leaching from borosilicate would affect results.

If you're not sure whether your application actually needs quartz versus standard borosilicate, it's worth checking your temperature and UV requirements first — quartz is the right call less often than buyers initially assume, and standard borosilicate covers the majority of lab needs at a fraction of the cost.

Technical Specifications

Quartz specifications vary more between suppliers than borosilicate does, since grade and purity affect both cost and performance, so the values below reflect what we typically supply across our fused quartz product range. Because quartz components are often fabricated closer to buyer-specific requirements than standard catalog borosilicate items, dimensions like wall thickness and overall length can generally be adjusted within reasonable limits at the quotation stage. Let us know if your application needs a specific purity grade, UV transmission spectrum, or maximum-temperature rating confirmed in writing before you place an order, and we'll provide the relevant documentation alongside the quote itself. If you're comparing quartz suppliers, transmission range and continuous-use temperature are usually the two figures worth verifying most carefully, since marketing claims in this category don't always match tested performance.

Parameter	Typical Value
Material	Fused Quartz / Fused Silica (SiO₂ ≥ 99.9%)
Coefficient of Linear Thermal Expansion	Approx. 0.55 × 10⁻⁶ / K
Softening Point	Approx. 1,650°C
Continuous Use Temperature	Up to approx. 1,100°C
Short-Term Peak Temperature	Up to approx. 1,200°C
Density	Approx. 2.20 g/cm³
UV Transmission Range	Approx. 170nm – 2,500nm, depending on grade
Chemical Purity	Very low leachable metal ion content; high acid resistance
Available Forms	Tubes, rods, vessels, cells, custom-fabricated components
Forming Method	Flame-worked / oxy-hydrogen torch fabrication, hand-finished
Lead Time	Generally longer than borosilicate due to specialized fabrication

Frequently Asked Questions

Do I actually need quartz, or would borosilicate work?
If your process doesn't involve temperatures above roughly 500°C or UV transmission below 300nm, borosilicate 3.3 is almost certainly sufficient and considerably cheaper — see our borosilicate 3.3 lab glassware tag.

Why is quartz more expensive than borosilicate?
Mainly fabrication temperature and technique — quartz has to be worked at over 1,600°C using oxy-hydrogen torches, which is slower, more skill-dependent, and less automatable than standard borosilicate glassblowing.

Can quartz and borosilicate components be joined directly?
Not by direct fusion — the expansion coefficients are too different. A graded seal or mechanical adapter is needed; we can fabricate these as custom pieces.

Is quartz more fragile than borosilicate?
It's more resistant to thermal shock but can be more sensitive to sharp mechanical impacts, so handling during shipping and use matters more than with standard lab glass.

Do you offer custom quartz fabrication?
Yes — our custom lab glass fabrication & OEM service covers quartz components built to drawing, though lead times run longer than for standard catalog items.

What lead time should I plan for a quartz order?
Generally 20–40 days depending on complexity; send specifications for a firm estimate.

Can I order a mix of quartz and borosilicate items on the same purchase order?
Yes, that's common — just note that quartz items will typically extend the overall lead time of the combined shipment, so let us know if you'd rather split it into two shipments instead.

Joints & Sealing Considerations

Quartz behaves differently from borosilicate when it comes to joints and sealing, and it's worth understanding that before assuming components are interchangeable across materials.

Ground glass joints can be made in quartz, but they're more expensive and time-consuming to produce than borosilicate joints, since grinding and polishing fused silica to the same tolerances takes longer and requires more careful handling to avoid micro-fractures. For that reason, many quartz components in practice use flame-fused or fused-in connections rather than ground taper joints, particularly for items like UV cells and furnace tubes that don't need to be disassembled regularly.

Where quartz components do need to interface with the rest of a glass train — say, a quartz reaction vessel connecting to a borosilicate condenser — we generally recommend a graded seal or an adapter piece rather than assuming direct joint compatibility, since directly fusing quartz to borosilicate isn't practical due to the expansion mismatch. Our workshop can fabricate custom transition adapters for this kind of mixed-material setup; it's a common enough request that it's worth mentioning directly rather than leaving buyers to guess. For general information on how our standard taper system works, our standard ground joint lab glassware tag has more detail, though most of that applies specifically to borosilicate components.

Ordering, Payment & Shipping

Quartz glassware generally follows the same commercial terms as the rest of our catalog, though lead times and packaging get a bit more attention given the material's cost and fragility.

Payment methods — T/T, L/C, and Alibaba Trade Assurance, with a 30% deposit / 70% before-shipment structure typical for new buyers; adjustable for repeat customers.
Lead times — quartz items typically take longer than standard borosilicate products, since fabrication is more specialized and often involves smaller production runs; expect 20–40 days depending on complexity and order volume, longer for fully custom geometries.
Packaging — given the higher unit cost and the material's sensitivity to mechanical impact (despite its thermal toughness), quartz items get individual rigid protective packaging within reinforced cartons or wooden crates, rather than standard bulk cushioning.
Shipping — FOB Shanghai as standard; sea freight for larger orders, air freight for smaller or urgent shipments. Given the higher per-unit value, we're happy to discuss insured shipping options for larger quartz orders on request.

Because quartz items are often semi-custom, it's worth confirming exact specifications and lead time before finalizing an order rather than assuming standard borosilicate timelines apply. For buyers combining a quartz order with standard borosilicate items in the same shipment, we can typically consolidate packaging and freight to keep overall shipping costs reasonable, so it's worth listing everything together in your initial inquiry rather than requesting separate quotes.

Certifications & Quality Assurance

Quartz glassware ending up in analytical, semiconductor-adjacent, or pharmaceutical settings usually comes with stricter documentation expectations, so here's what's actually in place.

ISO 9001 quality management certification applies across our production, including specialized quartz fabrication.
Material purity documentation — SiO₂ content and trace element data available on request, which matters for buyers using quartz specifically to avoid metal ion contamination in sensitive processes.
RoHS and REACH — quartz glass itself is free of the restricted substances covered under both regulations, relevant for EU-bound shipments.
UV transmission testing — for cells and components where transmission spectrum matters, we can provide test data or arrange third-party verification for larger orders.
Third-party inspection — SGS or equivalent pre-shipment inspection can be arranged for buyers who need it as part of their own quality assurance process.

If your lab operates under a specific accreditation framework (ISO 17025, GMP, etc.) and needs particular documentation formats, let us know early in the order process — it's much easier to arrange upfront than to retrofit after production. We're also happy to provide a certificate of conformity alongside the shipment itself, which some buyers need for internal customs or import documentation even when a full test report isn't required.

About

Shanghai Heqi Glassware Co., Ltd.

One point of professionalism, one point of service, one point of companionship—allow me to be your reliable partner on the path forward!

Shanghai Heqi was founded in March 2002, It is China Quartz Lab Glassware Manufacturers and Custom Quartz Lab Glassware Suppliers, Specializing in the R&D and production of standard-mouth glass instruments. Over the years, the company has established production bases in locations such as Songjiang, Chengdu, Jiaxing, and Yancheng. By integrating technology, craftsmanship, and management expertise, Heqi has adopted mechanized and semi-mechanized techniques to replace traditional manual methods. It has also introduced assembly-line industrial processes to replace simple workshop-style production, thereby reducing costs and improving quality.

To deliver on its service commitment of “you make a call, we handle the rest,” Heqi also supplies a range of high-quality glass instruments, lab consumables, and experimental equipment from both domestic and international brands. With ample inventory, fast delivery, and premium service, the company ensures full support for its clients.

In recent years, Shanghai Heqi has brought together experts in chemical R&D, mechanical design and processing, and electronic control to form a dedicated R&D team. The company has also set up three specialized workshops for glass, metalworking, and assembly. These facilities produce a variety of small and pilot-scale equipment, including glass reactors, rotary evaporators, distillation units, high- and low-temperature circulation systems, vacuum pumps, stirrers, and UV analyzers.

Leveraging its in-house capabilities in design, production, and custom fabrication of glass components, Shanghai Heqi continuously enhances product quality and service standards. It also supports the chemical and pharmaceutical industries by enabling customized small-scale and pilot-scale equipment solutions.

Our custom service team is ready to provide you with expert advice and personalized solutions.

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