In Stock
Duma Bulb
High-Stability Borosilicate 3.3: Constructed from low-expansion glass that resists thermal shock and chemical corrosion during the intense heating cycles required for liquid-to-vapor phase transitions.
Precision-Drawn Capillary Neck: Features a narrow, thin-walled tip designed for rapid, hermetic flame-sealing, ensuring total containment of the vaporized sample during weight measurement and analytical cooling.
₹325.00
Quick answer: A Dumas Bulb is a specialized glassware vessel used in the Dumas method to determine the vapor density and molecular weight of a volatile liquid. Duma Bulb is priced at approximately ₹325 (indicative market benchmark, incl. GST, August 2026).
A Dumas bulb is used in the classic Dumas method for determining vapor density and molecular weight: a small amount of a volatile liquid is placed in the bulb, heated until it fully vaporizes and drives out the air, and the bulb is then sealed and weighed to calculate the vapor’s density. This provides a controlled environment for the heating and condensation steps the method requires. It’s a standard technique taught in college and university physical chemistry laboratories for determining molecular weights of volatile compounds.
Technical Specifications
| Parameter | Detail |
|---|---|
| Product Type | Dumas bulb (vapor density determination flask) |
| Method | Dumas method for vapor density and molecular weight |
| Construction | Glass |
| Exact capacity | Not independently verified for this listing — confirm with STEMAids before ordering |
| Thermal resistance rating | Manufacturer-stated — verify before publishing |
| Price | Approx. ₹325 (indicative market benchmark, incl. GST, August 2026) |
| Exact dimensions/technical detail | Not independently verified for this listing — confirm with STEMAids before specifying in a tender |
Applications
- Vapor density determination of volatile liquids
- Molecular weight determination using the Dumas method
- College and university physical chemistry practicals
- Stoichiometry and gas-phase measurement demonstrations
Care & Maintenance
- Handle with care during heating — use appropriate clamps and heat-resistant gloves
- Allow to cool fully before handling after use
- Clean thoroughly between experiments to avoid cross-contamination of samples
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 Dumas bulb used for?
It’s used in the Dumas method to determine the vapor density and molecular weight of a volatile liquid by heating a sample until it vaporizes, then sealing and weighing the bulb.
What capacity does this Dumas bulb hold?
The exact capacity has not been independently verified for this listing — confirm with STEMAids before ordering.
Is this suitable for a college chemistry teaching lab?
Yes — Dumas bulbs are standard equipment for physical chemistry practicals involving vapor density determination.
What heating equipment is needed alongside this bulb?
A controlled heat source such as a water bath or sand bath is typically used; contact STEMAids to confirm recommended equipment.
Does STEMAids supply matching heating apparatus?
Contact STEMAids to confirm compatible heating equipment 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.
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