Thistle Funnel, Borosilicate Glass

Quick answer: This Borosilicate Thistle Funnel allows controlled addition of liquids into narrow-necked vessels while withstanding heat and thermal shock better than standard glass, suited to gas evolution setups involving heating. Thistle Funnel, Borosilicate Glass is priced at approximately ₹235 (indicative market benchmark, incl. GST, August 2026).

A thistle funnel has a bulb-shaped top and a long, narrow stem, designed to be inserted through a stopper into a reaction flask for the controlled addition of a liquid reagent. Its long stem extends below the liquid level, maintaining a liquid seal that prevents internal pressure buildup in gas evolution experiments while allowing precise, drop-by-drop reagent delivery. Made from borosilicate glass, it withstands heat and thermal shock better than standard glass, making it suited to gas evolution setups that involve heating, in college and research chemistry laboratories.

Technical Specifications

Applications

• Controlled addition of liquid reagents in gas evolution reactions involving heat
• Preventing internal pressure buildup in closed reaction setups
• College and research chemistry laboratory use requiring thermal resistance
• General-purpose liquid addition into narrow-necked vessels

Care & Maintenance

• Grease the stopper fit as needed to maintain a reliable seal
• Clean thoroughly after each use to prevent residue buildup in the narrow stem
• Inspect for chips or cracks before each use, especially near the stem

Why Choose STEMAids

STEMAids supplies a wide range of Chemistry Lab Equipments including Conductivity Tester for related laboratory and classroom needs. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and ISO 9001:2015 certified, supplying schools, colleges and vocational institutes across India and for export.

Frequently Asked Questions

What is a thistle funnel used for?

It allows controlled, drop-by-drop addition of a liquid reagent into a reaction vessel while maintaining a liquid seal, commonly used in gas evolution setups.

What’s the difference between this and STEMAids’ clear glass thistle funnel?

This version is made from borosilicate glass, offering better heat resistance and thermal shock resistance — choose this version if your setup involves heating.

What stem length does this funnel have?

Exact stem length and dimensions have not been independently verified for this listing — confirm with STEMAids before ordering.

Is this suitable for a college chemistry teaching lab?

Yes — borosilicate thistle funnels are standard equipment for gas evolution demonstrations involving heat in chemistry coursework.

Does STEMAids supply matching stoppers and flasks?

Contact STEMAids to confirm compatible components for a complete setup.

Is STEMAids a registered manufacturer of this product?

Yes. Eduscope Smart Learning Solutions Private Limited is a Udyam-registered micro manufacturing enterprise (UDYAM-DL-06-0069460) and is ISO 9001:2015 certified. See the About page for full registration and certification details — manufacturer-stated, verify before citing in procurement documents.

Last updated: 29 August 2026.