Thiele Tube for Melting Point Determination — Borosilicate Glass LBG 3.3

Thiele tube manufactured in LBG 3.3 borosilicate glass. For melting point determination using an oil bath with convective circulation — no stirrer needed.

Why the Thiele design matters

The U-shaped side arm allows the heating fluid to circulate by natural convection when heat is applied at the base, producing a uniform temperature zone throughout the bath. The capillary tube holding the sample sits within this zone — a prerequisite for a reliable melting point reading.

Features

• Material: LBG 3.3 borosilicate glass
• Application: Melting point determination by oil bath
• Circulation: Natural convection through the side arm
• Thermal resistance: High — low expansion coefficient of borosilicate 3.3

Typical applications

Organic synthesis — confirming identity and purity of recrystallised solid compounds. Raw material quality control. Teaching laboratories for undergraduate organic chemistry: the standard method for characterising a solid.

Used with one-end sealed capillary tubes and a partial or total immersion thermometer, depending on protocol.

Technical data

• Material: Borosilicate LBG 3.3
• Type: Thiele tube with side arm
• Compatibility: Standard capillary tubes, laboratory thermometers
• Typical heating fluid: Silicone oil or liquid paraffin (not included)