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5540-Flask, Flat Bottom, Narrow Neck, DIN/ISO

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5540-Flask, Flat Bottom, Narrow Neck, DIN/ISO

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  • Made from ASTM E-438 Type 1, Boro 3.3 heat resistance glass
  • With beaded rim
  • Complies with DIN/ISO 1773

* Non DIN

PART  No. Capacity (ml) D. (mm) D1. (mm) H. (mm) PACK Qty.
5540-50 50 51 26 90 10
5540-100 100 64 26 105 10
5540-150 150 74 28 115 10
5540-250 250 85 34 138 10
5540-300 300 93 34 143 10
5540-500 500 105 34 220 10
5540-1000* 1000 131 42 163 10
5540-2000 2000 166 50 190 10
5540-3000 3000 185 50 230 6
5540-5000 5000 233 50 250 1
5540-10000 10000 280 65 360 1
5540-20000 20000 350 75 495 1

Here are some common uses for flat-bottom flasks with a narrow neck according to DIN/ISO standards:

  1. Reaction Vessels: These flasks are often employed as reaction vessels for chemical processes. The flat bottom provides stability on heating surfaces, and the narrow neck minimizes evaporative losses and allows for controlled additions.
  2. Heating and Distillation: The flat bottom is well-suited for even heating on laboratory hotplates or heating mantles. The narrow neck is beneficial when conducting distillation, as it helps to reduce the risk of vapor escaping and promotes efficient condensation.
  3. Solvent Evaporation: These flasks are suitable for solvent evaporation processes where controlled evaporation is required. The narrow neck helps in reducing the rate of evaporation and allows for the attachment of additional glassware if needed.
  4. Synthesis and Reactions: For chemical synthesis and reactions, the narrow neck facilitates controlled mixing and additions. It also minimizes the exposure of the reaction contents to the external environment, making it suitable for reactions sensitive to air or moisture.
  5. Storage of Small Volumes: The narrow neck design is practical for storing small volumes of liquids, where precise dispensing or sampling may be necessary. The narrow opening allows for easier pouring and reduces the risk of spillage.
  6. ISO and DIN Methods: Specific ISO or DIN methods may recommend the use of flat-bottom flasks with narrow necks for certain laboratory tests or analyses. These standards ensure uniformity and reliability in experimental setups across different laboratories.
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