Updated: 17 Feb 2025

flask with ground joints

Updated: 17 Feb 2025

#1

Best Choice
Lab Jacketed Reaction Flask,3-Neck Double Layer Round Bottom Reaction Flask Jacketed Reactor with Three 24/29 Ground Glass Joints (250 ML)

9.8

JiaoFengHeng

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Main highlights

3. Adopting an integrated design, the lid is non removable

2. The double-layer jacket reactor is a thick walled design made of high borosilicate glass material, which has a high coefficient of thermal expansion, high temperature resistance, and can withstand large temperature changes

1. The double-layer jacket reactor is equipped with three 24/29 frosted glass joints, and has two upper and lower inlet and outlet ports
#2

Value for Money
Laboy Glass 1000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Reaction Receiving Flask Organic Chemistry Lab Glassware

9.7

LABOY

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WIDELY USED----The round bottom flask is widely used in organic chemistry,in a or vacuum apparatus ,it’s used a a flask and receiving flask with a glass condenser and some adapters like the 14 way adapter,take-off adapter;In a reflux process,it’s used as a reaction flask with a reflux condenser.It is also used as a flask in rotary evaporators.

STANDARD SIZE--- This round bottom flask designed with 24/40 standard taper outer joint,interchangeable,leak-free,comparing to common boiling flask without ground joint, it is convenient,safe,easy-operation in laboratory glassware setup. Capacity of 1000mL.

HEAT-resistance DESIGN ---With spherical bottoms,this RBF is more resistance to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Laboy glass flasks are heavy wall designed,made by hand-blowing to ensure uniform wall thickness, made of high-quality borosilicate glass and annealed at 800 degree Celsius ,can be heated directly in an open flame and can withstand typical laboratory thermal variations in Chemistry processes like heating and cooling.
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#3
Eisco Labs - 1000 mL Flat Bottom Boiling Flask with 24/40 Ground Joint, Borosilicate Glass, Ideal for Organic Chemistry, Heating, Distillation, Reflux, Extractions & Solution Preparation in Labs

9.4

EISCO

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LARGE CAPACITY FLASK || 1000 mL flat-bottom boiling flask, perfect for large-scale heating, distillation, and chemical reactions

BOROSILICATE GLASS || Resistant to high temperatures and chemical corrosion, perfect for use with heating devices such as hot plates or burners

24/40 GROUND JOINT || Standard 24/40 ground joint allows secure connections with other lab apparatus like condensers and adapters
#4
stonylab Spherical Joint Round Bottom Receiving Flask, Borosilicate Glass Rotary Evaporator Receiving Flask with 35/20 Ground Joint, 500 ml

9.3

stonylab

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Main highlights

Standardized Joints: equipped with a 35/20 standard spherical joint, providing a smooth and even surface for quick and reliable connections

Rotary Evaporator Collection Flasks: optimally designed spherical joint flasks for seamless use with rotary evaporators, ensuring efficient solvent collection

Flexible Volume Selection: available at 500 ml, 1000 ml (1 L) and 2000 ml (2 l ) to accommodate varying laboratory requirements
#5
Eisco Labs - 2000 mL Flat Bottom Boiling Flask with 24/40 Ground Joint, Borosilicate Glass, Ideal for Distillation, Reflux, Chemical Reactions & Solvent Recovery in Lab and Industrial Settings

9.2

EISCO

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Main highlights

LARGE CAPACITY FLASK || 2000 mL flat-bottom boiling flask ideal for handling large volumes during distillation, extraction, and chemical reactions

BOROSILICATE GLASS || Constructed from heat and chemical-resistant borosilicate glass, perfect for high-temperature reactions and distillation

24/40 GROUND JOINT || Standard 24/40 ground joint ensures secure connections with condensers, adapters, and other lab apparatus
#6
GSC International FFB2000-24-40 Flat Bottom Flask, 2000ml, 24/40 Ground Glass Joint

8.9

GSC International

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Main highlights

Made from quality borosilicate glass

24/40 ground glass joint

2000ml capacity
#7
GSC International BMF500-24-40 Biomass Flask, 500ml, 24/40 Ground Glass Joint

8.7

GSC International

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Main highlights

This flask has a 24/40 ground glass bottom joint and a a 24/40 ground glass top joint.

These quality borosilicate glass Biomass Flasks have a 500ml capacity, a 24/40 ground glass bottom joint, and a 24/40 ground glass top joint. The large top openings are ideal for inserting materials for distillation.

The large top opening is ideal for inserting materials for distillation.
#8
Deschem 29/42 Round Bottom Glass Flask 1-Neck Lab Single Neck Ground Joint Boiling Bottle

8.6

Deschem

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Made From Borosilicate Glass 3.3

Linear Coefficient of Expansion------ 32×10-7/℃

Annealing Point ------560℃
#9
TOKIDNY Round-Bottomed Flask Single Neck Laboratory Flask Ground Joint Flask Power Supply Laboratory Bottle Laboratory Single Neck Flask Glassine Flasks High Borosilicate Glass Transparent

8.5

TOKIDNY

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Main highlights

Scientific flask-- more resistant to fracture under vacuum because the sphere distributes the stress more evenly,distilling flask

Round bottom laboratory flask-- suitable for beginners or professional use, easy to wash and maintain,glassine

Laboratory flask-- it is a good choice as a your at school if they do experiments in laboratory,laboratory boiling flask
#10
DONLAB CS2004 2000ml Erlenmeyer Flask with 24/40 Ground Stopper Conical Flask

8.3

DONLAB

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Main highlights

With 24/40 open bottom stopper

Erlenmeyer flask with taper outer joint

Capacity: 2000ml

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flask with ground joints

Lab Jacketed Reaction Flask,3-Neck Double Layer Round Bottom Reaction Flask Jacketed Reactor with Three 24/29 Ground Glass Joints (250 ML)

9.8

Main highlights

Laboy Glass 1000mL Single Neck Round Bottom Boiling Flask Heavy Wall with 24/40 Joint Heating Reaction Receiving Flask Organic Chemistry Lab Glassware

9.7

Main highlights

Eisco Labs - 1000 mL Flat Bottom Boiling Flask with 24/40 Ground Joint, Borosilicate Glass, Ideal for Organic Chemistry, Heating, Distillation, Reflux, Extractions & Solution Preparation in Labs

9.4

Main highlights

stonylab Spherical Joint Round Bottom Receiving Flask, Borosilicate Glass Rotary Evaporator Receiving Flask with 35/20 Ground Joint, 500 ml

9.3

Main highlights

Eisco Labs - 2000 mL Flat Bottom Boiling Flask with 24/40 Ground Joint, Borosilicate Glass, Ideal for Distillation, Reflux, Chemical Reactions & Solvent Recovery in Lab and Industrial Settings

9.2

Main highlights

GSC International FFB2000-24-40 Flat Bottom Flask, 2000ml, 24/40 Ground Glass Joint

8.9

Main highlights

GSC International BMF500-24-40 Biomass Flask, 500ml, 24/40 Ground Glass Joint

8.7

Main highlights

Deschem 29/42 Round Bottom Glass Flask 1-Neck Lab Single Neck Ground Joint Boiling Bottle

8.6

Main highlights

TOKIDNY Round-Bottomed Flask Single Neck Laboratory Flask Ground Joint Flask Power Supply Laboratory Bottle Laboratory Single Neck Flask Glassine Flasks High Borosilicate Glass Transparent

8.5

Main highlights

DONLAB CS2004 2000ml Erlenmeyer Flask with 24/40 Ground Stopper Conical Flask

8.3

Main highlights

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