Brush, Beaker

Quick Answer: The Brush, Beaker is a laboratory cleaning brush with a broad head of bristles, usually set in twisted wire on a handle, used to scrub the inside walls and base of beakers. A laboratory beaker brush is wider and shorter than a test-tube brush, so it covers the flat base and the corner where base meets wall.

Reaching the Corner of a Beaker

Residue in a beaker collects where the flat base meets the wall: precipitates settle there, evaporated solutions leave rings and stirring rods rarely reach into it. A beaker brush is shaped for this. Its bristle head is wide enough to press against the wall while the brush is turned, and many beaker brushes finish with a fan or tuft of bristles at the tip, which is pushed into the corner and rotated. A test-tube brush used in a beaker spins without enough contact to lift a stuck film.

Beakers come in low and tall forms and in many capacities, and one brush does not suit all of them. A brush that is too small for a large low form beaker takes many strokes; one too large will not enter a small beaker without bending the wire. The head size, bristle type and handle of this brush are not given in the listing, so specify the beaker sizes it will be used on. Nylon and natural bristle are both common in laboratory brushes, and nylon generally tolerates hot water and detergents well.

Technique and Care

• Soak dried residues first in warm detergent solution; brushing works on softened deposits far better than on dry ones.
• Check that no bare wire is exposed at the tip, since wire scratches glass; replace brushes whose bristles have worn.
• Rinse the brush after use and hang it head down to dry, so water does not collect in the twisted wire and rust it.
• After brushing, rinse the beaker with tap water and then distilled water, and check that water drains in an even film.

Specifications

Applications

• Removing precipitate films after gravimetric and qualitative analysis practicals.
• Scrubbing evaporation rings from beakers used to concentrate solutions.
• Cleaning beakers used as water baths and for food tests and enzyme experiments in biology.
• Washing plastic beakers gently where abrasive pads would scratch the surface.

Why Choose LabEquip

Beaker brushes are ordered alongside glassware by schools, colleges and testing labs setting up wash-up areas. LabEquip lists this brush in the General Lab Products range together with brushes for burettes, flasks and cylinders; send beaker sizes through the contact page.

Frequently Asked Questions

How is a beaker brush different from a test tube brush?

A beaker brush has a wider, shorter bristle head, often with a tuft at the tip, to scrub the flat base and the corner of a beaker. A test tube brush is narrow and long, made to fit inside a tube.

Can a beaker brush scratch glass?

The bristles themselves rarely scratch borosilicate glass, but an exposed wire tip or a worn head can. Check the tip before use and replace brushes where the wire shows through.

What should I use with the brush to clean a beaker?

Warm water and a laboratory detergent remove most residues. Stubborn inorganic deposits may need a short soak in dilute acid first, followed by brushing and thorough rinsing.

How do I know the beaker is clean?

Rinse it with distilled water and watch how the water drains. On clean glass it forms an even, unbroken film; droplets clinging to the wall show that grease or residue remains.

Is the brush suitable for plastic beakers?

Yes, a soft brush is kinder to plastic than scouring pads, which scratch the surface. Use gentle pressure, as polypropylene and other plastics scratch more easily than glass.

When should a beaker brush be replaced?

Replace it when the bristles splay, fall out or no longer spring back, or when the wire begins to show or rust. A worn brush cleans poorly and can scratch the glass.

Last Updated: September 2026