• Test Tube Borosilicate 3.3 Glass - Without Rim

Test Tube Borosilicate 3.3 Glass - Without Rim

CH-EDU1014-SN

  • Borosilicate

Vendor: SmartLabs

Suited For:

Country of Origin:

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R 3.50
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Test Tube Borosilicate 3.3 Glass (Flat Mouth/Without Rim) are premium laboratory tubes designed for high-stress applications involving extreme temperatures and corrosive chemicals. The "flat mouth" or "rimless" design features a smooth, straight-cut top edge, which is preferred for automated systems, clean pouring, and compact storage.

Key Features
  • Material: Borosilicate 3.3 Glass (ISO 3585), known for its ultra-low coefficient of thermal expansion.
  • Thermal Resistance: Can withstand high temperatures (up to 500°C) and extreme thermal shock (moving from heat to cold rapidly).
  • Chemical Stability: Superior resistance to water, neutral and acidic solutions, and strong oxidizers.
  • Design: Features a round bottom and a flat, rimless mouth for easy plugging with rubber or silicone stoppers. 
 
Standard Sizes & Capacities
Commonly used dimensions for Borosilicate 3.3 tubes:
 
Dimensions (Dia. x Length)  Capacity (Approx.) Common Application
12 x 75 mm 5 mL Small-scale reactions / Centrifuging
15 x 100 mm 12 mL General chemistry / Clinical use
18 x 150 mm 27 mL Standard lab experiments
20 x 150 mm 35 mL Microbiology / Media preparation
25 x 150 mm 55 mL Large volume boiling / Storage
 
 
Key Advantages
  • Flame Safety: Unlike soda-lime glass, these can be heated directly over a Bunsen burner or open flame without cracking.
  • Autoclavable: Fully resistant to repeated steam sterilization cycles at 121°C.
  • Clarity: Offers high optical transparency for accurate visual monitoring of reactions and color changes.
  • Versatility: The rimless top allows for a tighter fit in certain test tube racks and automated capping machines.

Rubber Stopper

  • 125 x 16mm test tube can be used with RS7 rubber stopper. RS7 is available as one hole, two hole or Solid.
  • 150 x 16mm test tube can be used with RS7 rubber stopper. RS7 is available as one hole, two hole or Solid.
  • 150 x 24mm test tube can be used with RS13 rubber stopper. RS13 is available as one hole, two hole or Solid.

Specifications:

  • Material: Borosilicate 3.3 Glass
  • Design: Round bottom and a smooth, rimless edge (no beaded rim)
  • Brand: NONE
  • Product of China

Delivery

We deliver nationwide across South Africa. Once your order is on its way, you'll receive a tracking link by email so you can follow its progress. If you need your order urgently or you're delivering somewhere hard to reach, contact our team before you check out and we'll help where we can.

Our Promise

At SmartLabs, we only stock equipment we'd trust in our own labs and classrooms. If a product arrives faulty or doesn't match its description, let us know and we'll make it right, whether that's a replacement or a refund. Our goal is for every order to work exactly as it should, the first time.