Separating Funnel Pyrex Glass

A Separating Funnel (also known as a Separatory Funnel) made from Pyrex glass is commonly used in laboratory settings for liquid-liquid extraction, where two immiscible liquids (often an organic solvent and water) need to be separated. Pyrex is a brand of borosilicate glass known for its high resistance to heat and chemicals, making it ideal for use in laboratory applications.

Here are the typical specifications for a Pyrex Separating Funnel:

1. Material:

• Pyrex (Borosilicate glass): Resistant to thermal shock, high temperatures, and most chemicals.

2. Volume:

• Common Sizes: 125ml, 250 mL, 500 mL, 1000 mL, 2000 mL, 5000 mL
• Larger volumes are typically available for specific laboratory needs.

3. Design:

• Shape: Conical or pear-shaped (for ease of separation and pouring)
• Stopcock: Typically made of Glass or Plastic, which is chemical-resistant and allows easy control of liquid flow. The stopcock is positioned at the bottom of the funnel.
• Neck: Usually cylindrical, allowing attachment of a stopper, clamps, or other connectors.

4. Graduations:

• Some Pyrex separating funnels are graduated for easy volume measurement, although they may not be as precise as volumetric glassware.

5. Stopcock Size:

• Typically 3-4 mm diameter for small funnels, and 6-8 mm for larger funnels, allowing for adequate liquid flow control.

6. Inlet/Outlet:

• Top Opening: For adding liquids or attaching a stopper.
• Stopcock: At the bottom for draining and separating liquids.

7. Tolerance:

• As a general laboratory product, the tolerances for Pyrex glassware are usually ±5% for volume measurement.

8. Temperature Resistance:

• Maximum Temperature: Can generally withstand temperatures up to 300°C (for brief periods).

9. Standard Features:

• Easy-to-read scale: If graduated, measurements are often in milliliters.
• Tapered design: Ensures easier separation of immiscible liquids.
• Wide mouth opening: To easily add and mix solvents.

10. Cleaning and Maintenance:

• Pyrex glass is easy to clean and can be used with most laboratory cleaning agents.