Assorted KONTES ACE Synthware Round Bottom Flasks 25 ml 14/20 Outer Joint - Total of 11 Flasks

Assorted Brand Round Bottom Glass Boiling Flasks, 25 mL with 14/20 Standard Taper Outer Joints (KONTES® / ACE Glass / Synthware®)

This Assorted Brand 25 mL Round Bottom Flask listing delivers high-durability, research-grade borosilicate glassware sourced from elite scientific apparatus manufacturers, including Kontes® Glass (294010-0025), ACE Glass (9458-06), and Synthware® (F301425). Specifically engineered for heating, boiling, distillation, and organic synthesis applications, these flasks feature a classic spherical round bottom geometry designed to provide uniform thermal distribution and eliminate localized stress concentration points during intensive boiling or vacuum loops. The top neck features a precision-ground 14/20 Standard Taper ($TS$) outer joint, ensuring direct mechanical compatibility with standard microscale organic chemistry kits, reflux condensers, distillation manifolds, and vacuum adapters. Sourced from verified laboratory equipment overstocks and asset liquidations, these assorted components provide an economical solution for academic synthetic chemistry labs, pharmaceutical pilot lines, and specialized extraction setups.

Technical Performance & Material Architecture

• Spherical Round Bottom Geometry: The uniform, spherical base geometry ensures flawless thermal conductivity across the entire lower surface area of the vessel. This configuration eliminates sharp interior corners or structural stress points, minimizing localized thermal hot spots and facilitating even boiling when paired with heating mantles or oil baths.
• Type I Class A Borosilicate Glass: Formulated from premium low-expansion borosilicate glass ($33\text{ expansion}$ standard). This chemical matrix is highly inert, preventing ion leaching and resisting aggressive organic solvents, strong mineral acids, and high-temperature reactive mixtures.
• Precision Ground 14/20 Joint Matrix: Features a frosted, highly uniform 14/20 standard taper socket. This precision outer joint establishes a hermetic, leak-free compression seal when mated with standard 14/20 male inner joints, preventing vapor escape or atmospheric contamination when properly greased or used with PTFE joint sleeves.
• Vacuum-Rated Durability: Engineered to manage rapid thermal shifts and intense boiling agitation under reduced pressure conditions without experiencing mechanical fracturing, micro-cracking, or joint implosion.

Product Specifications

• Catalog Identity / Mix: Assorted Premium Stock (Kontes® 294010-0025, ACE Glass 9458-06, Synthware® F301425, or exact dimensional equivalents)
• Volumetric Capacity: 25 mL Nominal Volume
• Vessel Configuration: Classic Spherical Round Bottom / Single Short Neck
• Joint Specification: 14/20 Standard Taper ($TS$) Outer Joint (Socket style)
• Material Profile: Clear Type I, Class A Borosilicate Glass
• Application Class: Microscale Organic Synthesis, Reflux Reactions, Fractional Distillation, and Thermal Solvent Boiling
• Packaging Configuration: Cleaned, inspected, and securely wrapped for damage-free transit (Sold individually or in assorted laboratory prep packs)

Key Benefits & Applications

• Reflux and Synthesis Reactions: The industry benchmark vessel configuration for assembling small-scale reflux setups, executing chemical synthesis pathways, and conducting functional organic distillations within 14/20 glass manifolds.
• Uniform Thermal Solvent Distillation: Ideal for boiling or condensing low-volume chemical fractions where uniform heating is required to maintain steady vapor velocity through fractionating columns.
• Corrosive Chemical Staging: The highly inert borosilicate surface handles aggressive acids and organic reagents (like chloroform, toluene, or acetone) without leaching ions, preventing sample contamination.
• **Cost-Effective Facility Staging:** Ideal for university organic chemistry laboratories, research teams, and testing labs looking to stock essential microscale glassware lines without paying single-unit wholesale catalog prices.

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