Wash bottle

Lab Wash Bottles

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.

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.

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. The yellow color indicates isopropanol and blue indicates that there is distilled water.

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.