Assorted ACE Kontes Heavy Wall Recovery Flasks 25 ml 14/20 Outer Joint - Total of 8 Flasks

Assorted Brand Heavy Wall Glass Recovery Flasks, 25 mL with 14/20 Standard Taper Outer Joints (ACE Glass / KONTES®) – Lot of 8 Flasks

This Assorted Brand 25 mL Heavy Wall Recovery Flask lot delivers high-durability, research-grade borosilicate glassware sourced from elite scientific apparatus manufacturers, including ACE Glass (9470-04) and Kontes® Glass (294300-0025). Specifically engineered for vacuum distillation, rotary evaporation, and microscale organic synthesis, these recovery flasks feature a specialized teardrop or pear-shaped geometry that facilitates optimal structural fluid drainage and concentrate reclamation. Each flask is styled with a heavy-walled glass baseline capable of withstanding intense negative pressure differentials without imploding. The top neck features a precision-ground 14/20 Standard Taper ($TS$) outer joint, ensuring direct mechanical compatibility with standard microscale organic chemistry kits, distillation manifolds, and vacuum adapters. Sourced from verified laboratory equipment overstocks and asset liquidations, this lot of 8 flasks provides an economical solution for academic synthetic chemistry labs, pharmaceutical pilot lines, and specialized extraction setups.

Technical Performance & Material Architecture

• Pear-Shaped High-Recovery Geometry: The tapered, pear-shaped interior wall architecture directs all boiling fluids and concentrated residues toward the absolute lower apex of the vessel. This configuration minimizes surface area fluid retention, allowing maximum recovery margins via standard micro-pipettes or syringe needles.
• Heavy Wall Structural Integrity: Fabricated with an increased glass wall thickness profile compared to standard boiling flasks. This heavy-duty borosilicate distribution provides superior structural resistance against thermal shock and extreme pressure gradients during deep-vacuum solvent strippings.
• 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.

Product Specifications

• Catalog Identity / Mix: Assorted Premium Stock (ACE Glass 9470-04, Kontes® 294300-0025, or exact dimensional equivalents)
• Volumetric Capacity: 25 mL Nominal Volume
• Vessel Configuration: Pear-Shaped / Teardrop Recovery Profile (Heavy wall construction)
• Joint Specification: 14/20 Standard Taper ($TS$) Outer Joint (Socket style)
• Material Profile: Clear Type I, Class A Borosilicate Glass | High-Durability Rounded Apex Base
• Total Lot Quantity: 8 Flasks Total (Cleaned, inspected, and securely wrapped for damage-free transit)
• Application Class: Microscale Organic Synthesis, Rotary Evaporation, Vacuum Distillation, and Sample Concentration

Key Benefits & Applications

• Rotary Evaporation Concentrate Collection: The industry benchmark platform for strip-cleans and solvent removal loops under vacuum where low-volume crystalline residues or essential oils must be scraped or redissolved cleanly.
• Microscale Organic Reaction Staging: Serves as an excellent boiling vessel for refluxing, synthesizing, or storing low-volume organic intermediates within standard 14/20 glass manifolds.
• Vacuum Distillation Lines: Designed to manage rapid thermal shifts and intense boiling agitation under vacuum without experiencing mechanical fracturing or joint failure.
• **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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