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

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

Heavy-Wall Borosilicate Glass Construction Crafted from premium 3.3 borosilicate glass with thick walls (3.5–5mm) for superior thermal and mechanical strength. Withstands direct flame heating, vacuum conditions, and extreme temperature changes without cracking.
Standard 24/40 Taper Joint – Outer Joint Precision-ground 24/40 outer joint ensures airtight, leak-proof connections with condensers and adapters. Interchangeable with other standard lab glassware for seamless integration in organic chemistry setups.
1000mL Capacity – Designed for Large-Scale Chemistry Setups Used for multi-step distillations, batch reactions, or vacuum applications. The 1000 mL volume is suited for industrial labs, scale-up processes, and preparative chemistry.
Round Bottom for Uniform Heat Distribution Round bottom design promotes even heating, reduces hotspots, and minimizes stress fractures. Requires support via cork ring or clamp – recommended for controlled heating with mantles or water baths.
Hand-Blown Quality – Stress Relieved & Impurity-Free Each flask is handcrafted and annealed at high temperatures for optimal clarity and structural integrity. No bubbles or contaminants—ensuring reproducibility in critical lab procedures.

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Round-bottom flasks (also called round-bottomed flasks, Flasks, round bottom, or RB Flasks)having spherical bottoms are more resistant to fracturing under vacuum, as a sphere more evenly distributes stress across its surface. Because of the spherical bottom, cork rings are needed to keep the round bottom flasks upright,or heated by the water bath ,oil bath or sand bath.When in use, round-bottom flasks are commonly held at the neck by flask clamps on a stand.

The flasks are usually used in heating or boiling a liquid, in distillation as distilling flasks and receiving flasks for the distillate, used as the distilling flasks in rotary evaporators.It is usually used with other jointed lab glassware like glass condenser,separatory funnels,cow receivers.

The round bottom flask has larger heating surface than the flat bottom flask and can be heated evenly.It is usually used in the laboratory operation requiring high temperature and long time heating,or vacuum distillation.

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.

Laboy Glass 25mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

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 25mL.

Laboy Glass 50mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 100mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 250mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

Laboy Glass 500mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

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

Laboy Glass 2000mL Single Neck Round Bottom Boiling Flask Heavy Wall 24/40 Joint Heating Distillation Reaction Receiving Flask Organic Chemistry Lab Glassware

US Standard Size Joint Will Fit into European Standard Size Joint

Standard Taper Ground Glass Joints are interchangable.For either frosted, presicon-ground standard taper joints (same size),the inner ground surfaces (male joint) make a good seal with the outer(female joint)). The joint size is described by the form A/B. The first number A represents the outer diameter (OD) in millimeters (mm) at the widest point of the inner (male) joint and the second number B represents the length of the joint. For example, a 14/20 joint is 14 mm wide at the top (the widest part) and is 20 mm in longth. The joint has a standard taper 1:10, any two joints (male and female) with the same outside diameter (A)can fit into each other ,no matther how lenght the joints are. For example, a 24/40 (US standard size) joint on a condenser will fit into a 24/29 (European standard size)flask but the ground glass joint will protrude (40 - 29) 11mm into the flask.

Heavy Wall Design,Durable and Reusable

Laboy glass ware are all made of high quality boroslicate glass according to ASTM E438,heavy wall design,durable and reusable.

Protection of Products in Transit

Check the integrity of the product before packaging.
Bubble wrap tightly around the product.
Fill the space in the packing box with pearl cotton.

Material: Borosilicate Glass(PYREX Glass)

Silicon content	>80%
Strain and Temperature	520℃
Annealing temperature	800℃
Index of refraction	1.47
Transmittance	≧90％
Elastic modulus E	67KNmm-2
Tensile strength	40-120Nmm-2
Processing temperature(104dpas	1220℃

Coefficient thermal expansion	(20-300℃) (3.3±0.1)×10-6/K -1
Poisson's ratio μ	0.2
Density（20℃）	2.23g/cm3
Specific heat	0.9Jg-1K-1
Thermal conductivity	(20-100℃）1.2Wm-1K-1
Water resistance	1 Level
Acid resistance	1 Level
Alkali resistance	2 Level

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