Gas Washing Bottle

Quick Answer: This Gas Washing Bottle is a laboratory glass vessel used to bubble a gas stream through a liquid reagent, allowing impurities to be scrubbed out or the gas to be dried, humidified, or reacted before it continues to the next stage of an experiment.

A gas washing bottle typically has two glass tubes fitted through a stopper: one tube extends down close to the bottom of the bottle so incoming gas is forced to bubble up through the liquid inside, and the other tube sits near the top to let the treated gas exit. This design maximises the contact time between the gas and the liquid, which is useful for purification, drying, humidifying, or reacting a gas stream as part of a larger set-up. It is commonly used in analytical chemistry, gas generation experiments, and industrial process demonstrations.

Specifications

Applications

• Scrubbing impurities from a gas stream by bubbling it through a suitable liquid reagent
• Drying or humidifying a gas before it is used in a downstream reaction
• Gas generation and collection demonstrations in school and college laboratories
• General analytical chemistry procedures requiring gas-liquid contact

Care & Handling

Rinse the bottle and tubes thoroughly with distilled water after use, especially when changing the liquid reagent, to avoid cross-contamination. Check that the stopper and tubes form a secure, airtight seal before starting an experiment, since a poor seal reduces gas-liquid contact efficiency. Inspect the glass tubes for cracks or chips, as damaged tubing can affect the gas path or create a safety hazard. Store the bottle and tubes separately in a dry place when not assembled.

Why Choose LabEquip

LabEquip supplies a wide range of laboratory glassware, including gas washing bottles, gas generation apparatus, and general chemistry glassware, to schools, colleges, and industrial laboratories across India. We’re happy to help you choose the right apparatus for your application. Browse our full range of lab glassware and other chemistry lab equipment, or contact us for bulk pricing and institutional quotations.

What is a gas washing bottle used for?

A gas washing bottle is used to pass a gas stream through a liquid reagent, which can purify the gas by removing impurities, dry or humidify it, or bring it into contact with a reagent as part of a reaction sequence.

How does the two-tube design work?

One tube extends down close to the bottom of the bottle so gas entering through it must bubble up through the liquid, maximising contact. The second, shorter tube sits near the top of the bottle and allows the treated gas to exit and continue to the next part of the set-up.

Can this bottle be used with corrosive liquids like acids?

Laboratory glass gas washing bottles are generally chemically resistant to common laboratory reagents, but always check the specific reagent’s compatibility with glass and fittings, and follow your institution’s safety guidelines when working with corrosive liquids.

Do I need a specific stopper or tubing to use this bottle?

Yes, a gas washing bottle is normally used with a two-hole stopper and glass or rubber tubing to form the inlet and outlet paths. Confirm your required stopper size and tubing when placing your enquiry.

What capacities are available?

This gas washing bottle is supplied in a range of standard laboratory capacities. Please confirm the exact volume you require when placing your enquiry so we can advise on availability.

Do you supply gas washing bottles in bulk for institutions?

Yes. LabEquip supplies laboratory glassware, including gas washing bottles, in bulk for schools, colleges, and industrial laboratories. Please contact us with your quantity and capacity requirements for a quotation.

Last Updated: September 2026