Attention:

Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Separatory Funnels

Separation Funnels

Separatory funnels, or separation funnels, are a common fixture in chemistry labs. These funnels are used to separate immiscible liquids from their solutes. The funnel is usually glass, pear-shaped, and usually includes a stopper and a stopcock.

Separatory funnels work on the principle that immiscible liquids will separate from each other naturally along with their solutes, creating different layers of solution-solute. For example, a non-polar solute can be extracted from a solution by mixing it with a non-polar solvent in a separation funnel. After initial mixing, the initial solution and non-polar solvent will separate and the solute will be in the new solvent. These layers can be separated in perpetuity by draining them from the separatory funnel using the stopcock to control the flow.

The layers will separate in the funnel based on their relative densities, with the lowest density liquid above higher densities. However, it is important to not assume that the bottom layer in a separatory funnel is always the aqueous solution; while most organic solvents are less dense than aqueous solvents, processes such as halogenation may cause exceptions to this rule. For these reasons, it remains necessary to choose the right solvents for the separation.

Always use proper technique when using a separatory funnel. For example, mixing should generally be done by gentle inversion when the stopper is secure and the stopcock is closed. Venting should be done with the stopcock pointed to the back of the hood. Finally, always use appropriate protective gear while working in any laboratory setting.

Product #

Description

Add to Cart

Z418218 Aldrich® System 45 Squibb separatory funnel capacity 125 mL
Z418226 Aldrich® System 45 Squibb separatory funnel capacity 250 mL
Z418234 Aldrich® System 45 Squibb separatory funnel capacity 500 mL
Z418242 Aldrich® System 45 Squibb separatory funnel capacity 1,000 mL
Z418250 Aldrich® System 45 Squibb separatory funnel capacity 2,000 mL
Z418269 Aldrich® System 45 Squibb separatory funnel capacity 4,000 mL
Z418277 Aldrich® System 45 Squibb separatory funnel capacity 6,000 mL
Z336807 BRAND® Imhoff sedimentation cone, SAN
Z260681 Nalgene® FEP separatory funnel capacity 125 mL
Z260703 Nalgene® FEP separatory funnel capacity 250 mL
Z260711 Nalgene® FEP separatory funnel capacity 500 mL
Z260738 Nalgene® FEP separatory funnel capacity 1,000 mL
Z260746 Nalgene® FEP separatory funnel capacity 2,000 mL
Z261017 Nalgene® polypropylene separatory funnel capacity 125 mL
Z261025 Nalgene® polypropylene separatory funnel capacity 250 mL
Z261033 Nalgene® polypropylene separatory funnel capacity 500 mL
Z261041 Nalgene® polypropylene separatory funnel capacity 1,000 mL
CLS6383125 Pyrex® cylindrical separatory funnel, PTFE stopcock
CLS6383250 Pyrex® cylindrical separatory funnel, PTFE stopcock
CLS6383500 Pyrex® cylindrical separatory funnel, PTFE stopcock
CLS6383A100 Pyrex® cylindrical separatory funnel, PTFE stopcock with standard taper joints, graduated, Joint: ST/NS 24/40
CLS640660 PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 4 ea
CLS6406125 PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 4 ea
CLS6406250 PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 4 ea
CLS6406500 PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 4 ea
CLS64061L PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 1 ea
CLS64062L PYREX® economy Squibb separatory funnel polyethylene stopper, PTFE stopcock, pack of 1 ea
CLS64062LFO PYREX® replacement Squibb separatory funnel w/o valve and stopper pack of 1 ea
CLS640660FO PYREX® replacement Squibb separatory funnel w/o valve and stopper pack of 4 ea
CLS6406125FO PYREX® replacement Squibb separatory funnel w/o valve and stopper
CLS6406250FO PYREX® replacement Squibb separatory funnel w/o valve and stopper pack of 4 ea
CLS6406500FO PYREX® replacement Squibb separatory funnel w/o valve and stopper pack of 4 ea
CLS64061LFO PYREX® replacement Squibb separatory funnel w/o valve and stopper pack of 1 ea
CLS6406GTO PYREX® replacement tip for economy Squibb separatory funnels pack of 36 ea
CLS6402250FO Pyrex® Squibb separatory funnel, funnel only funnel only, capacity 250 mL
CLS6413125 Pyrex® Squibb separatory funnel, jointed top and bottom, PTFE stopcock capacity 125 mL
CLS640060 Pyrex® Squibb separatory funnel, ST stopper, Rotaflo® stopcock
CLS6302125 Pyrex® Squibb separatory funnel, ST stopper, Rotaflo® stopcock size 125 mL
CLS6302250 Pyrex® Squibb separatory funnel, ST stopper, Rotaflo® stopcock size 250 mL
CLS63021L Pyrex® Squibb separatory funnel, ST stopper, Rotaflo® stopcock
CLS63022L Pyrex® Squibb separatory funnel, ST stopper, Rotaflo® stopcock size 2,000 mL
Z304239 Quickfit® separating funnels capacity 50 mL, Joint: ST/NS 14/23
Z177741 Scienceware® rotary separatory funnel rack funnel size 500-1,000 mL