Test tube holder

Short description: Equipment to hold a test tube when it should not be touched

A test tube holder is used to hold test tubes.[1] It is used for holding a test tube in place[2] when the tube is hot or should not be touched.[3] For example, a test tube holder can be used to hold a test tube while it is being heated.[4] Moreover, when heating the tube with liquid or solid contained inside, the holder ought to tightly hold a test tube[5] in order for the tube to be safely held while heating.[6]

Particularly, for liquid heating, when holding a test tube holder with a test tube, hold it such that it aligns with the lab bench and also point the open end of the tube away from yourself or anyone nearby.[7]

Additionally, while using a test tube holder, the proper distance between the test tube holder and the top of the test tube is approximately 3 centimetres.[8]

A wooden test tube holder

## Contents

* 1 Structure
* 2 Purpose
* 3 See also
* 4 References

## Structure

Structurally, jaws of a test tube holder are self-closed by a spring and can be manually adjusted.[9]

## Purpose

The purpose of a test tube holder is to be used only to hold a test tube as it is not structured for flasks or other heavier objects. It also is used when wanting to burn something small that cannot be held using your hand.[10]

* A metal test tube holder

A wooden test tube holder

## See also

* Test tube
* Test tube rack

## References

1. ↑ "Wiltronics - Test Tube Racks Holders & Cleaning Brushes". http://www.wiltronics.com.au/catalogue/120141/science/test-tubes-and-centrifuge-tubes/test-tube-racks-holders-and-cleaning-brushes.
2. ↑ "Test Tube Holder". http://www.testtubeholder.org/.
3. ↑ "Test Tube Clamp / Holder". http://www.sciencecompany.com/Test-Tube-Clamp-Holder-P6285.aspx.
4. ↑ Saland, Leonard (1989-01-01). Practical Chemistry Labs: A Resource Manual. Walch Publishing. ISBN 9780825115110. https://books.google.com/books?id=RAIDpod25X4C.
5. ↑ "Handling and moving hot apparatus | Nuffield Foundation". http://www.nuffieldfoundation.org/practical-chemistry/handling-and-moving-hot-apparatus.
6. ↑ Saland, Leonard (1989-01-01). Practical Chemistry Labs: A Resource Manual. Walch Publishing. ISBN 9780825115110. https://books.google.com/books?id=RAIDpod25X4C.
7. ↑ "Safety in the chemistry laboratory". http://cms.cerritos.edu/uploads/Chemistry/Safety/Zewail_Safety_in_the_Chem_Lab090810.pdf.
8. ↑ Interactive Science Practical Book 1A Special/ Express/ Normal (Academic). Panpac Education Pte Ltd. 2001-01-01. ISBN 9789812086082. https://books.google.com/books?id=uOZTznssVGMC.
9. ↑ Ockerman, Herbert W. (1991-04-22). Illustrated Chemistry Laboratory Terminology. CRC Press. ISBN 9780849301520. https://books.google.com/books?id=3x5pi9Hw228C.
10. ↑ "Safety and laboratory procedures". CWU Department of Chemistry CHEM 101 Laboratory Manual. 2009. http://www.cwu.edu/~petersj/chem101sp09/safety.pdf.

* v
* t
* e

Laboratory equipment

General

* Heaters
* Dryers

* Alcohol burner
* Bunsen burner
* Desiccator
* Heating mantle
* Hot plate
* Lab oven
* Kiln
* Meker–Fisher burner
* Striker
* Teclu burner
* Water bath
* Vacuum dry box

|

* Mixers
* Shakers

* Chemostat
* Homogenizer
* Liquid whistle
* Magnetic stirrer
* Mortar and pestle
* Shaker
* Sonicator
* Static mixer
* Stirring rod
* Vortex mixer
* Wash bottle

* Stands
* Clamps
* Holders

* Beaker clamp
* Clamp holder
* Tripod
* Burette clamp
* Extension clamp
* Flask clamp
* Funnel support
* Iron ring
* Pinch clamp
* Retort stand
* Screw clamp
* Test tube holder
* Test tube rack
* Wire gauze
* Lab drying rack

* Containers
* Storage

* Agar plate
* Cryogenic storage dewar
* Incubator
* Laminar flow cabinet
* Microtiter plate
* Petri dish
* Picotiter plate
* Refrigerator
* Weighing boat
* Weighing dish

Other items|

* Aspirator
* Autoclave
* Balance brush
* Cork borer
* Crucible
* Filter paper
* File
* Forceps
* Centrifuge
* Microscope
* Pipeclay triangle
* Spectrophotometer
* Splint
* Stopper
* Scoopula
* Spatula
* Test tube brush
* Wire brush
* Inoculation needle
* Inoculation loop

Glassware

| Apparatus|

* Dean–Stark
* Soxhlet extractor
* Kipp's

|

Bottles|

* Boston round
* Pycnometer

Condensers|

* Cold finger
* Liebig

Dishes|

* Evaporating
* Petri
* Syracuse
* Watch glass

Flasks|

* Büchner
* Vacuum (Dewar)
* Erlenmeyer
* Fernbach
* Fleaker
* Florence
* Retort
* Round-bottom
* Schlenk
* Volumetric

Funnels|

* Büchner
* Hirsch
* Dropping
* Separatory

Measuring devices|

* Burette
* Conical measure
* Cuvette
* Eudiometer
* Graduated cylinder
* Ostwald viscometer
* Pipette
* Pipette (dropper)

Tubes|

* Boiling
* Drying
* Cragie
* Ignition
* Nuclear magnetic resonance (NMR)
* Test
* Thiele
* Thistle

Other items|

* Beaker
* Bell jar
* Gas syringe
* Vial

Analytical chemistry

| Compositional|

* AutoAnalyzer
* CHN analyzer
* Colorimeter
* Inductively coupled plasma (ICP) device
* Gas chromatograph (GC)
* Liquid Chromatograph (LC)
* Mass spectrometer (MS)
* pH indicator
* pH meter

|

Microscopy|

* Scanning electron microscope (SEM)
* Transmission electron microscope (TEM)

Thermochemistry|

* Calorimeter
* differential scanning
* Melting-point apparatus
* Thermometer
* Thermogravimetric analyzer (TGA)

Other items|

* Analytical balance
* Colony counter
* Spiral plater
* Nuclear magnetic resonance (NMR) instrument
* Plate reader

Electronics

* Ammeter
* Current source
* Function generator
* Galvanostat
* Multimeter
* Network analyzer
* Oscilloscope
* Pulse generator
* Potentiostat
* Spectrum analyzer
* Time-domain reflectometer
* Voltage source
* Voltmeter

Safety

Personal protective
equipment (PPE)

* Lab coat
* Face shield
* Respirator
* Rubber apron
* Safety shower

Eye and hand|

* Acid-resistant gloves
* Eyewash station
* Glove box
* Medical gloves
* Nitrile gloves
* Safety glasses
* Safety goggles

Other items|

* Acid (solvent) cabinet
* Biosafety cabinet
* Fire blanket
* Fire extinguisher
* Fume hood

Instruments used in medical laboratories

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