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Erlenmeyer Conical Flask with Screw Cap

The Erlenmeyer Conical Flask with Screw Cap is a borosilicate 3.3 glass conical flask fitted with a polypropylene (PP) screw cap with PTFE liner, providing a secure, airtight seal for safe mixing, heating, and storage of chemical solutions.

Specs

  • Material: Borosilicate Glass 3.3 high thermal resistance
  • Compliance: ASTM / DIN ISO compliant versions available upon request.
  • Design: Conical Erlenmeyer flask with threaded screw neck
  • Capacity Options: 50 ml / 100 ml / 150 ml / 250 ml / 500 ml / 1000 ml / 2000 ml / 5000 ml
  • Closure: Chemical-resistant screw cap included
  • Graduation: White enamel approximate volume markings
  • Base: Flat stable base for secure placement
  • Chemical Resistance: Resistant to acids, alkalis, solvents
  • Thermal Resistance: Suitable for heating applications

Description

The Erlenmeyer Conical Flask with Screw Cap from Osmosis Scientific is a high-quality laboratory vessel designed for reliable liquid handling, mixing, heating, and storage. Manufactured from premium Boro 3.3 borosilicate glass, the flask provides excellent resistance to thermal shock and chemical corrosion, ensuring dependable performance across routine and demanding laboratory applications.

Its classic conical geometry enables efficient swirling and mixing while minimizing splashing and evaporation. The threaded neck with a secure screw cap provides tight closure, helping protect solutions from contamination and environmental exposure during storage or handling.

White enamel graduations allow quick visual estimation of liquid volumes during laboratory workflows. The flat base enhances stability on laboratory benches, reducing tipping risk and improving operational safety.

Available in capacities ranging from 50 ml to 5000 ml, this flask supports both small analytical procedures and large-volume solution preparation. The durable borosilicate construction withstands repeated heating cycles, cleaning procedures, and standard laboratory conditions without compromising structural integrity.

Erlenmeyer Conical Flask with Screw Cap – ASTM E‑438 Borosilicate with PP/PTFE Cap
Capacity (mL)Thread SizeDiameter (mm)Pack ofSKUEnquiry
50GL 25512EFSC-0050-GL25Enquire Now
100GL 25642EFSC-0100-GL25Enquire Now
150GL 25722EFSC-0150-GL25Enquire Now
250GL 45852EFSC-0250-GL45Enquire Now
500GL 451052EFSC-0500-GL45Enquire Now
1000GL 451312EFSC-1000-GL45Enquire Now
2000GL 451662EFSC-2000-GL45Enquire Now
5000GL 452202EFSC-5000-GL45Enquire Now

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    Frequently Asked Questions (FAQs)

    What is the purpose of a screw cap on an Erlenmeyer flask?

    The screw cap creates an airtight, leak-resistant seal that prevents evaporation, contamination, and spillage during storage, heating, mixing, transport, and cell culture work.

    What are GL 45 and GL 25 thread sizes?

    GL (ground glass) thread sizes indicate the neck opening diameter and length in millimeters. GL 25 is smaller (used for 50–150 mL flasks), while GL 45 is larger (used for 250+ mL flasks).

    Is the screw cap reusable?
    Yes, quality screw caps are designed for multiple autoclaving and use cycles; however, PTFE liners may eventually wear or warp after extended use or aggressive autoclaving.

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