The term "aniline yellow" refers to a bright yellow dye derived from aniline, a colorless toxic oily liquid. Its chemical formula is C6H5NH2, and it is pronounced as [ænɪlaɪn ˈjɛloʊ]. The first syllable "an" is pronounced as the short vowel sound "æ", followed by the second syllable "i", pronounced as "ɪ". The final syllable "line" is pronounced as "laɪn" and the word "yellow" ends with "oʊ", which sounds like "oh". Together, the word is pronounced as "ænɪlaɪn ˈjɛloʊ".
Aniline yellow refers to a vivid and bright yellow synthetic dye that belongs to the azo dye family. It is also known by its chemical name Acid Yellow 36. The term "aniline" stems from the fact that it is derived from aniline, an organic compound used in its production. Aniline yellow is highly soluble in water and is commonly used as a coloring agent in various industrial applications.
This dye is extensively utilized in the textile and leather industries to impart a brilliant yellow color to fabrics, including cotton, silk, and wool. Moreover, aniline yellow finds application in the manufacturing of paints, inks, plastics, and cosmetics due to its vibrant and long-lasting color properties. It possesses excellent lightfastness, which means it can resist fading or discoloration when exposed to sunlight or other light sources.
Furthermore, aniline yellow can also be employed as an indicator in certain chemical reactions, demonstrating a color change at specific pH levels. This characteristic makes it valuable in analytical chemistry as a dye for pH indicators. However, it is important to note that aniline yellow has been largely replaced by more modern, stable, and safer yellow dyes in many industries due to concerns over its toxicity and potential health risks.
In summary, aniline yellow is a synthetic yellow dye that is widely used as a colorant in textiles, paints, plastics, and cosmetics. Its vibrant hue and resistance to light make it suitable for various applications, but it is being replaced by safer alternatives in many industries.
An unstable substance used as a base for more permanent dyes.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "aniline yellow" is a compound term consisting of "aniline" and "yellow".
1. Aniline: The term "aniline" comes from the French word "aniline" and the Spanish word "añil", both of which refer to the dye obtained from the indigo plant. It was named after the indigo plant's botanical name, "Indigofera anil", by French chemist and astronomer Jean-Baptiste Guimet in 1826. Later, the German chemist August Wilhelm von Hofmann assigned the name "aniline" to a colorless oily liquid compound he obtained from indigo in 1841. The word "aniline" ultimately derives from the Latin word "indicum", meaning "indigo".
2. Yellow: The word "yellow" derives from the Old English word "geolu", which originally referred to the color yellow or gold.