Reaction Flask with Glass Stopcock (CS-F53) 50–1000 ml

The CS-F53 Reaction Flask is a laboratory-grade round-bottom vessel designed for controlled chemical reactions, reagent addition, drainage, and sampling. Manufactured from high-quality 3.3 borosilicate glass, each flask features an integrated 2 mm glass stopcock and precision ground joint, enabling accurate liquid control directly from the reaction vessel.

Every unit is hand-blown and annealed at 800 °C, producing a thick-wall, uniform structure with excellent resistance to thermal shock and chemical attack. These flasks can be heated directly over open flame (with appropriate laboratory practice) and are suitable for demanding synthesis and research environments.

Key Features

• Heavy-wall borosilicate 3.3 glass
  High resistance to heat, acids, alkalis, and most laboratory solvents.

• Integrated 2 mm glass stopcock
  Allows precise draining or controlled reagent transfer without dismantling the setup.

• Round-bottom geometry
  Promotes even heat distribution during reflux and boiling.

• Precision ground joints
  Compatible with standard condensers, adapters, and laboratory assemblies.

• Hand-blown construction
  Uniform wall thickness for improved durability and thermal stability.

• Multi-stage quality inspection
  Cleaned, annealed, and inspected before dispatch.

• OEM / ODM available
  Custom sizes, branding, and packaging on request.

Available Capacities & Joint Options

Technical Specifications

• Product Name: Reaction Flask with Glass Stopcock

• Model: CS-F53 Series

• Material: Borosilicate glass (3.3 grade)

• Colour: Clear

• Flask Type: Round bottom

• Stopcock: Integrated glass, 2 mm bore

• Capacities: 50 ml – 1000 ml (2000 ml available on request)

• MOQ: 1 pack

• Packaging: Safe export packing

• Customisation: OEM / ODM supported

Typical Applications

• Chemical synthesis

• Controlled reagent addition or drainage

• Reflux reactions

• Sampling during reactions

• Teaching laboratories

• Research and analytical chemistry

Summary

The CS-F53 Reaction Flask combines heavy-wall borosilicate construction, precision ground joints, and an integrated glass stopcock to deliver a versatile solution for controlled laboratory reactions. Designed for durability and accuracy, it is ideal for chemists who need direct fluid control from the reaction vessel without compromising system integrity.

A dependable choice for professional laboratories requiring robust, heat-resistant reaction flasks with built-in flow control.