• Polypropylene Stopper

Polypropylene Stopper

PSPP-0057-1

Vendor: SmartLabs

50 in stock
R 4.60
R 4.60
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Extremely lightweight and durable polypropylene stoppers. Acid-proof and autoclavable. Polypropylene (PP) Stopper with a standard taper joint, specifically designed for volumetric flasks.

Available Size:

  • 10/19
  • 12/21
  • 14/23
  • 19/26
  • 24/29
  • 29/32
  • 34/35
Compatibility
 
The 10/19 size is the standard fit for:
  • 5ml, 10ml, and 20ml Volumetric Flasks (Class A or B).
Why use PP over Glass?
  1. Safety: No risk of broken glass if dropped.
  2. No Seizing: PP does not stick to the ground glass neck of the flask, even when storing alkaline solutions (which often cause glass-on-glass joints to fuse).
  3. Cost: Significantly more affordable for high-traffic student or commercial labs.
Specifications
  • Joint Size: 10/19 (Standard Taper).
  • Material: High-grade Polypropylene (PP).
    • Unlike glass stoppers, these are unbreakable and won't "freeze" or jam in the neck of the flask.
  • Design:
    • Hexagonal Head: Prevents the stopper from rolling off the lab bench when set down.
    • Vented/Hollow Bottom: Most Omsons PP stoppers are hollow to reduce weight and allow for slight expansion without popping out.
  • Chemical Resistance: Excellent resistance to most acids, bases, and aqueous solutions. However, they can be affected by some strong organic solvents (like ethers or aromatic hydrocarbons) over long periods.
  • Autoclavable: Can be sterilized at 121°C, making them reusable for sterile volumetric preparations.
  • Brand: OMSONS
  • Product of India