Laboy Glass 500mL Round Bottom Boiling Flask, Single Neck Heavy Wall Borosilicate with 35/20 Joint – Heating, Reaction & Receiving Flask for Organic Chemistry Lab Use

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. 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. 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.

• 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 35/20 Ball Joint – Easy Assembly with Pinch Clamp Precision-formed 35/20 ball joint allows quick and secure connections between lab components. Its spherical interface enables fast setup and disassembly, especially in vertical or angled assemblies. Designed to be held in place using a pinch clamp for a tight, reliable seal in distillation, vacuum, or reflux systems.
• 500mL Capacity – Ideal for Mid-Scale Reactions Perfect for distillation, heating, boiling, or chemical synthesis. The 500 mL volume is commonly used for medium-scale reactions in academic, industrial, or pharmaceutical laboratories.
• 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.