Flat Bottom Flask

Glass Flat Bottom Flask

Guide Medlab flat‑bottom boiling flasks are heavy‑duty laboratory glassware crafted from premium 3.3 borosilicate glass. Thanks to their stable flat base, these flasks can stand upright on lab benchtops without extra support, making them well‑suited for heating, reflux and general‑purpose chemical reactions. They are available with plain fire‑polished necks or interchangeable ground joints in sizes such as 24/29, 29/32, alongside custom non‑standard dimensions. Boasting excellent thermal‑shock resistance and high chemical inertness, they serve routine applications in chemistry laboratories, university teaching labs and industrial R&D departments.

Product Specification

Product Name	Glass Flat Bottom Flask
Material	Borosilicate 3.3 Glass
Available Capacity	25ml,50ml,100ml,250ml,500ml,1000ml,2000ml,3000ml,5000ml
Feature	Wide neck, uniform wall thickness, stable flat base, smooth rim
Neck Type	Plain non‑ground neck, fire‑polished edge
Neck Option	Ground joint optional: standard joint 24/29, 29/32 and non‑standard joints available
Glass Property	High thermal shock resistance, good chemical inertness
Marking	Without graduation marking
OEM	Available

●Advantage

Featuring stable self‑standing flat base for convenient placement on lab countertops, our flat bottom boiling flasks come with uniform wall thickness to achieve even heat distribution. The 3.3 borosilicate glass delivers excellent thermal‑shock resistance and great inertness against most common lab reagents. Multiple capacities together with optional standard or non‑standard ground joints are offered, and OEM customization service is also available to match diverse experimental requirements.

Application

Guide Medlab glass flat‑bottom boiling flasks are heavy‑duty reaction vessels crafted from 3.3 borosilicate glass, engineered for uniform heating, reflux and distillation workflows. They are widely used in organic chemistry labs, pharmaceutical research, environmental analysis and university chemistry teaching.

• Continuous heating, boiling and constant‑temperature reactions for organic synthesis

• Laboratory distillation, reflux condensation and solvent purification processes

• Long‑term thermal reactions requiring stable, even heat distribution

• Sample pretreatment and routine chemical testing for research and industrial laboratories

Usage Method

1. Before operation, inspect the glass body for cracks or damage. Clean the flat‑bottom flask thoroughly and dry it completely prior to use.

2. For hot‑plate heating: Place the flask steadily on the hot‑plate surface. Do not fill liquid over two‑thirds of total volume. Avoid sharp temperature changes to prevent glass cracking.

3. For reflux & distillation assembly: Connect with matched ground‑glass accessories such as condensers. Secure joint connections properly before starting heating. Do not heat the empty flask.

4. For temporary reagent storage: Set the flask upright on the bench or flask rack thanks to its stable flat base. It is only for short‑term preservation, not for long‑term sample storage.

5. After the experiment, cool down the flask to room temperature first, then clean residues promptly. Handle carefully to protect the flat bottom and ground‑glass joints from collision.

Quality Control

Packing, Storage and Transportation

●Packing

Glass flat bottom flasks are packaged in standard export corrugated cartons that comply with GB/T 6543. Outer cartons are clearly marked with product name, specification, quantity, net weight, gross weight and volume. Custom OEM packing services are available.

●Storage

Store the packaged flasks indoors in a clean, dry environment. Do not over-stack cartons. Keep away from corrosive chemicals to protect glass performance.

●Transportation

Sea, air and railway transportation are all acceptable. Avoid strong impact, dropping, heavy compression and moisture during loading, unloading and transportation.

Capacity	25ml	50ml	100ml	250ml	500ml
Packing Qty	400pcs/carton	192pcs/carton	192pcs/carton	72pcs/carton	48pcs/carton
Capacity	1000ml	2000ml	3000ml	5000ml
Packing Qty	24pcs/carton	12pcs/carton	8pcs/carton	4pcs/carton

FAQ

Q1: Do you offer free samples?
Yes, we provide free samples (usually 5‑10pcs) for your evaluation. Shipping cost is covered by the customer or negotiated separately.
Q2: What is the minimum order quantity (MOQ)?
MOQ varies by products, usually for flasks, MOQ is 5 cartons; for plasticwares, MOQ would be 1 carton; for other disposable glasswares, MOQ is also 5 cartons, we suggest adding a pallet to protect glass goods.

Q3: What payment methods do you accept?

We accept T/T (bank transfer) or payments through Alibaba.

Q4: Can I add my own design or logo to the product?

Yes, we provide OEM/ODM service .

Q5: Can you provide CE and ISO for your products?

Yes, all products come with complete technical documentation including CE, ISO and COA. For some products, we offer FDA compliance.

Q6: Do you support shipping insurance and freight options?

Yes, we offer sea, air and courier shipping with optional full insurance coverage.

Q7: How do you prevent scratches & deformation during shipping?

We pack them in thick 5-layer corrugated cartons. The damage rate is controlled below 1%.

Q8: What is your policy for damaged goods?

If scratched, deformed or missing items are found upon receipt, please send photos/videos within 48 hours. We will arrange free replacements or corresponding refunds.

Q9: What is your typical lead time?

For custom engraved or bulk orders, it usually takes 15–25 days.

Q10: Do you have a price list for bulk purchases?

Yes, we offer tiered pricing based on order volume. Please contact our sales team for a formal quote.

Q11: Do you participate in international labware exhibitions?

Yes, we regularly attend exhibitions like ARABLAB, ACHEMA, and Analytica.

Hot Tags: Flat Bottom Flask,Glass Flask