Methylene Blue

Methylene blue (Methylene blue, methylene blue, Methylene blue) is an organic compound, dimethyl ether of aniline and 2-aminobenzoic acid.

Synonyms: methyl thiocyanate, methyl thionite, methyl cyanide, methyl anthrone, methylene cyanide.

International name: methylene chloride.

Physical properties.
At room temperature it is a colorless liquid that turns light blue when heated. It is poorly soluble in water. Easily oxidized by air.
Methylene blue is insoluble in water, but dissolves well in alcohol, acetone and other organic solvents.
The boiling point of methylene blue is 139-140 degrees Celsius.
The density of methylene blue is 1.004-1.01 g/cm³.
Chemical properties.
Methylene blue is an organic substance that has several properties that make it useful for use in a variety of applications. One of the most important properties is the ability of methylene blue to stain bacteria blue under microscopy. This property is used to study a bacterial culture and determine its growth and reproduction. In addition, methylene blue is used as a dye in the textile industry, as well as in medicine for dyeing fabrics and leather. It is also used in the production of paper inks and dyes. However, it should be noted that methylene blue can be toxic if ingested and can cause various health problems. Therefore, its use should be limited and controlled.

Methylene blue (methylene blue) is an organic compound used as an indicator of acidity. The structural formula of methylene blue is C₁₂H₁₈N₂O₃S.

When interacting with hydrogen ions, methylene blue changes its color. At pH = 3 - blue, at pH = 4 - blue-violet, at pH 5 - blue-green, at pH from 6 to 8 - blue, at pH above 9 - red.

Methylene blue is widely used in medicine, in particular for staining bacteria for microscopy.