Wash bottle

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Lab Wash Bottles
Lab wash-bottles water EtOH.jpg
Plastic wash bottles for ethanol and water
Other names Squeeze Bottle
Uses To clean laboratory glassware and other equipment. They are filled with appropriate cleaning liquids, and poured over the tool that needs to be cleaned.
Notable experiments The wash bottle is generally used in the clean-up phase of many experiments


A wash bottle is a squeeze bottle with a nozzle, used to rinse various pieces of laboratory glassware, such as test tubes and round bottom flasks.

Wash bottles are sealed with a screw-top lid. When hand pressure is applied to the bottle, the liquid inside becomes pressurized and is forced out of the nozzle into a narrow stream of liquid.

Materials of wash bottles[edit]

Most wash bottles are made up of polyethylene, which is a flexible solvent-resistant petroleum-based plastic. Most bottles contain an internal dip tube allowing upright use.

Wash bottles may be filled with a range of common laboratory solvents and reagents, according to the work carried out in that lab. These include: deionized water, detergent solutions and rinse solvents such as acetone, isopropanol or ethanol. In biological labs it is common to keep sodium hypochlorite solution in a wash bottle to conveniently disinfect unneeded cultures.

Colour codes on wash bottles[edit]

To help researchers and users recognize types of substances used in laboratory especially harmful chemicals, there are a consistent set of colour codes and markings. Red color indicates that the substance in the wash bottle is acetone.White' color indicates that there is ethyl alcohol or sodium hypochlorite . Methanol is indicated by green green. The yellow color indicates isopropanol and blue indicates that there is distilled water.

Labels on wash bottles[edit]

Hazardous substances are classified into six principal categories including toxic, oxidizer, corrosive, flammable, explosive, and irritant . The sign for toxic substances is a skull and cross-bones. The picture of a flame with a circle in the middle of the flame indicates that the chemical substances are oxidizers. Therefore, organic materials can be burned. For the chemicals which are corrosive, the picture of an object which is coroded is the sign for this kind of substances. The picture of a flame without any circle in the middle helps recognize flammable substances. This kind of substances can result in the rapid ignity of many materials and substances.For the explosive substances, the picture of an object which is explode is used as a sign for explosive chemicals. In addition, the sign for irritant substances is the picture of the exclamation mark.

For the diamond labeling warning the danger of chemicals, red, yellow, and blue diamonds on wash bottles are scaled from 4 to 0. The number 4, 3, 2, 1, 0 on the top diamond (red diamond) representing are flammable below 21 c, below 38 c, below 93, above 93 c, and not flammable, respectively. The blue diamond on the left side is also scaled from 4 to 0 which represents deadly, extremely hazardous, hazardous, slightly hazardous, and normal material, respectively. In addition, the diamond on the right side (yellow diamond) represents the reactivity which also range from 4 to 0. The white diamond on the bottom indicate whether substances in wash bottles are air reactive, water reactive, carcinogen, and radioactive substances .[1]


To be safe, put chemicals substances into wash bottles with appropriate sign of warning; therefore, the lables on wash bottles are necessary. Furthermore, do not put harmful chemicals into wash bottles for distilled water or deionized water. In addition, the holes in wash bottles lids are used for acetone and methanol.[2]

Additional images[edit]

See also[edit]


  1. ^ "Life Technologies". www.thermoscientific.com. Retrieved 2017-02-24. 
  2. ^ "ขวดฉีดน้ำกลั่น (wash bottle)". glasswarechemical.com. Retrieved 2017-02-24.