Chemglass Round Bottom Flask 100 ml 2-Neck CN-24/40 SN-10/30 - Lot of 4 Flasks

The Chemglass CG-1520-01 is a specialty 100 mL Round Bottom Flask designed for complex laboratory syntheses that require simultaneous access to the vessel while heating or stirring. Manufactured from heavy-wall KG-33 Borosilicate Glass, these flasks are engineered to withstand the thermal stresses of heating mantles and the mechanical vacuum pressures common in organic chemistry. The "Round Bottom" geometry is the standard for chemical reactions, as it ensures uniform heating of the reagents and facilitates efficient stirring with magnetic bars or overhead stirrers.

The defining characteristic of this model is its Two-Neck configuration, which provides distinct ports for multi-step procedures. Center Neck (CN) - 24/40 Joint: This is the primary vertical port, sized with a standard 24/40 ground glass joint. It is typically used for the main reflux condenser, an overhead stirring shaft, or a primary addition funnel. Side Neck (SN) - 10/30 Joint: This smaller, angled port utilizes a 10/30 ground glass joint. This secondary access point is ideal for inserting a thermometer, a gas inlet tube for inerting the reaction with nitrogen/argon, or for the careful addition of reagents via syringe without disturbing the main condenser setup. This is a Lot of 4 Flasks, which is a common unit for equipping a laboratory bench or replacing frequently used glassware in a teaching lab.

Used, very clean. Looks like new.