Glass Separatory Funnel

The Glass Separatory Funnel is laboratory glassware used for separating immiscible liquid phases and performing liquid-liquid extraction. It is intended for schools, colleges, chemistry laboratories, analytical laboratories and research facilities that require controlled separation of liquid layers during practical, preparative and analytical procedures.

Product Description

The STEMAids Glass Separatory Funnel is designed for laboratory procedures in which two immiscible liquids are allowed to form separate layers before controlled drainage. A separatory funnel typically combines a closed vessel, lower outlet and stopcock so the denser phase can be released independently from the upper phase.

The exact capacity, funnel shape, glass specification, stopcock material, stopper type and graduation details of this STEMAids model have not been verified and should be confirmed before procurement. Laboratories can review the STEMAids laboratory and science product categories for related equipment.

Key Features

• Designed for phase separation: Supports controlled separation of two immiscible liquid layers.
• Suitable for solvent extraction: Can be used for liquid-liquid extraction when the selected chemicals are compatible with the supplied materials.
• Controlled outlet: A separatory funnel uses a stopcock to regulate discharge of the lower liquid phase.
• Useful for chemistry instruction: Demonstrates density differences, partitioning and extraction principles in laboratory practicals.
• Reusable laboratory apparatus: Suitable for repeated use when properly cleaned, inspected and stored.
• Supports visual phase observation: The transparent vessel allows users to observe the interface between separated liquid layers.
• Procurement transparency: Capacity, stopcock construction, stopper and glass specification should be confirmed for the supplied model.

Technical Specifications

What’s Included in the Kit

• Glass Separatory Funnel 
• Stopcock assembly 
• Stopper
• Protective packaging

For supporting laboratory equipment, browse STEMAids laboratory and educational products.

Applications / Uses

• Separating immiscible liquid phases.
• Liquid-liquid solvent extraction.
• Washing organic or aqueous phases during chemistry procedures.
• School and college extraction demonstrations.
• Sample preparation in analytical laboratory workflows.
• Teaching density, partitioning and phase-separation principles.

How to Use the Glass Separatory Funnel

1. Inspect the funnel, stopcock and stopper for damage before use.
2. Confirm that all supplied materials are compatible with the liquids being handled.
3. Close the stopcock before adding the liquid mixture.
4. Add the liquids without exceeding the safe working volume specified for the funnel.
5. Fit the stopper and mix according to the laboratory procedure.
6. Vent the funnel frequently when pressure may develop, directing the outlet away from people.
7. Secure the funnel vertically in an appropriate support and allow the phases to separate.
8. Remove the stopper when appropriate, then open the stopcock gradually to drain the lower phase into a suitable vessel.
9. Close the stopcock when the liquid interface reaches the outlet and collect the remaining phase separately.

Safety note: Wear appropriate eye protection, gloves and laboratory PPE. Never point a pressurized separatory funnel toward yourself or another person, and do not use cracked or damaged glassware.

Care & Maintenance

• Clean the funnel promptly using a procedure compatible with the chemicals handled.
• Rinse the stopcock and outlet thoroughly to prevent residue buildup or blockage.
• Store the funnel securely to protect the glass body, outlet and stopcock from impact.
• Inspect seals, stopper surfaces and the stopcock before each use.

Why Choose STEMAids

STEMAids is the STEM education brand of Eduscope Smart Learning Solutions Private Limited, a New Delhi manufacturing enterprise. Its Udyam-registered activities include manufacture of laboratory and pharmaceutical glassware, and the company holds an active Importer-Exporter Code for international trade. STEMAids operates ISO 9001:2015 and ISO 14001:2015 management systems; these company-level certifications should not be interpreted as a product-specific conformity certificate for this separatory funnel.

Buyers planning broader laboratory procurement can also review the STEMAids product-category directory and STEMAids manufacturing and company credentials.

Frequently Asked Questions

What is a Glass Separatory Funnel used for?

A Glass Separatory Funnel is used to separate immiscible liquids and perform liquid-liquid extraction. It allows the lower liquid phase to be drained separately through a controlled outlet.

How does a separatory funnel work?

Two immiscible liquids are allowed to settle into separate layers according to their densities. The lower layer is then released through the stopcock while the upper layer remains in the funnel.

What capacity is available?

The capacity of this exact STEMAids model has not been verified. Confirm the required nominal capacity before placing an order.

What material is the stopcock made from?

The stopcock material has not been confirmed. Buyers should verify whether the supplied model uses glass, PTFE or another construction before procurement.

Can a separatory funnel be used for solvent extraction?

Yes. Liquid-liquid solvent extraction is a principal application of separatory funnels, provided the solvents and samples are chemically compatible with the funnel, stopcock and stopper.

Why must a separatory funnel be vented?

Mixing volatile liquids or chemical systems can increase pressure inside the closed funnel. Controlled venting helps release pressure and reduces the risk of the stopper or liquid being forced out unexpectedly.