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Dropping Funnel, Cylindrical, Rotaflow Stopcock

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Dropping Funnel, Cylindrical, Rotaflow Stopcock

Dropping Funnel, Cylindrical, Rotaflow Stopcock

Cylindrical, with Rotaflow stopcock & Polyethylene stopper.

  • Compliance with ISO 4800 Standards
  • Provided with PE Stopper
  • With Rotaflow stopcock

Note:

  1. Graduated Dropping funnel can also be offered.
  2. Printing can be done in White, Blue or Amber color enamel.
SKU: 11307 Categories: , ,

Description

Catalogue No.Capacity (ml)
11307/0150
11307/02100
11307/03250
11307/04500
11307/051000

The Dropping Funnel, Cylindrical with Rotaflow Stopcock is a precision liquid-handling apparatus designed for controlled addition of reagents during chemical reactions, titrations, and extraction processes. Its cylindrical design ensures consistent flow, while the high-quality borosilicate glass construction provides exceptional chemical and thermal resistance. This funnel is an essential tool for research laboratories, universities, pharmaceutical manufacturers, and industrial QC/QA environments requiring reliability and accuracy in reagent dispensing.

 Key Features

  • Cylindrical body for uniform reagent flow and enhanced measurement stability.
  • High-precision Rotaflow stopcock ensures smooth, leak-free, and controlled dispensing.
  • Manufactured from Borosilicate Glass 3.3 for excellent thermal resistance and chemical durability.
  • Provided with a PE or polyethene stopper for secure sealing during preparation and handling.
  • Compliance with ISO 4800 standards, ensuring global laboratory compatibility.
  • Non-stick PTFE keys (if applicable) minimise wear and support long-term use.
  • Optional graduations are available for accurate volume monitoring.
  • Colour-printed enamel markings are available in white, blue, or amber for enhanced visibility.

 Material Specifications

  • Material: Borosilicate Glass 3.3

Thermal Properties:

  • Low thermal expansion coefficient (~3.3 × 10⁻⁶ /°C)
  • Ideal for heating, cooling, and autoclaving operations

Chemical Resistance:

  • High resistance to acids, solvents, and organic reagents
  • Suitable for long-term use with aggressive chemicals

Mechanical Strength: Durable structure designed to withstand regular lab handling

Standards: Conforms to ISO 4800 and relevant global laboratory glassware norms (DIN/ASTM compatibility)

 Technical Specifications

  • Available Capacities: Common sizes include 50 mL, 100 mL, 125 mL, 250 mL, 500 mL, and 1000 mL.

Dimensions:

  • Cylindrical body with tapered outlet
  • Standard joint sizes and stem lengths suitable for universal lab setups

Accuracy / Tolerance:

  • Volumetric accuracy as per ISO standards
  • Optional graduated markings for precise volume control

  • Calibration: Graduation accuracy compliant with ISO 4800 (if graduation is selected)

  • Stopcock: Rotaflow type, PTFE key or glass key option, depending on model

Packaging:

  • Individually packed in shock-resistant, export-grade packaging
  • Bulk or custom packaging available for distributors and OEM clients

Included Accessories:

  • Polyethylene stopper
  • Rotaflow stopcock assembly

 Handling & Precautions

Safe Use:

  • Ensure the stopcock is properly lubricated (if a glass key) before use.
  • Avoid sudden temperature changes to protect glass integrity.

Cleaning Instructions:

  • Rinse immediately after use with mild detergents or appropriate solvents.
  • Use soft brushes; avoid abrasive cleaners.

Autoclaving:

  • Safe for autoclaving at standard temperatures for borosilicate glass.
  • Remove the PE stopper before autoclaving.

Do’s & Don’ts:

  • Do check stopcock alignment before dispensing.
  • Do handle the long stem with care to avoid breakage.
  • Don’t use with strong alkali solutions at high temperatures for prolonged periods.

Best Practices:

  • Store vertically to prevent stopcock stress.
  • Inspect regularly for chips or cracks for maximum safety.

Applications

  • Chemical Laboratories: Controlled addition during synthesis, titrations, and reagent dosing.
  • Pharmaceutical Industries: Required in formulation, R&D, and quality control testing.
  • Biotechnology & Life Sciences: Suitable for buffer preparation, extraction, and controlled reagent mixing.
  • Academic & Research Institutions: Common in teaching labs, practical chemistry setups, and student experiments.
  • Industrial QC/QA Labs: Critical for standardised, repeatable reagent handling procedures.

  • Supports workflows where precision dosing, safe reagent handling, and excellent chemical resistance are essential.

Why Choose MEDILAB

  • 35+ years of manufacturing expertise in high-precision laboratory glassware.
  • Exporting to 40+ countries, trusted by global distributors and research institutions.
  • Premium production quality, using high-grade borosilicate glass and advanced forming techniques.
  • OEM & Private Label Services are available for distributors and brand owners worldwide.
  • Consistent reliability, strict QC inspection, and compliance with international standards.
  • Secure export packaging designed to withstand long-distance shipping and handling.

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