Xanthene
A yellow organic compound at the core of many fluorescent dyes
No single value: Xanthene is a material, and its colour varies. The background shows its family, yellow.
Xanthene is a yellow solid organic compound with the formula CH2[C6H4]2O. While not widely used itself, its derivatives form the basis of several fluorescent dyes ranging from yellow to bluish red.
- Xanthene is a yellow solid organic compound.
- It is the chemical core for many fluorescent dyes.
- Xanthene dyes range from yellow to bluish red.
- Common xanthene dyes include fluorescein and rhodamines.
What colour is Xanthene?
Xanthene is a yellow solid organic compound. It is soluble in common organic solvents and is best known as the chemical core for a group of dyes called xanthene dyes. These dyes can appear in shades from yellow to pink to bluish red and are often fluorescent, meaning they can glow under certain light. Xanthene itself is not widely used, but its structure is important in dye chemistry.
Where does Xanthene come from?
The name xanthene comes from its chemical structure, which is related to the Greek word for yellow. The compound itself, 9H-xanthene or 10H-9-oxaanthracene, is an organic molecule. While xanthene is not commonly used on its own, its derivatives have become important in the development of synthetic dyes.
How is Xanthene made?
Xanthene dyes are typically made by condensing derivatives of phthalic anhydride with derivatives of resorcinol or 3-aminophenol. These chemical reactions create a range of dyes with the xanthene core, each with different colours and properties. Xanthene itself is a synthetic compound.
Where Xanthene is used
The main use of xanthene is as the base structure for a family of dyes. These xanthene dyes include well-known examples such as fluorescein, eosins, and rhodamines. They are valued for their brilliant, often fluorescent colours and are used in various applications where bright, glowing dyes are needed.
Yellow around the world
What the yellow family means from country to country.
The yellow disc of the Aboriginal flag is the sun, giver of life. The flag was designed by the Luritja artist Harold Thomas and first flown in Adelaide in 1971.
Sacred and holySource: Australian Aboriginal flagAt the gaye holud, held a day or two before a wedding, relatives rub turmeric paste on the bride and groom. Guests dress in yellow and orange.
Weddings and marriageFestival and celebrationJoySource: Gaye holudOn Pohela Falgun, the first day of spring, young women wear yellow and orange saris, a shade called basanti, with flowers in their hair.
Festival and celebrationNature and renewalJoySource: Pohela FalgunThe Flemish flag is a black lion on yellow, and the Walloon flag a red cockerel on yellow. The language communities are often shown by these colours.
Politics and protestPrideSource: Flag of FlandersThe flag is yellow, the colour of the Sultan. By custom, ordinary people did not wear yellow in the ruler's presence.
Royalty and powerPrideSource: Flag of BruneiThe national football team plays in a yellow shirt with green trim, the canarinho. It was chosen in a newspaper contest after the 1950 World Cup final was lost in white.
Festival and celebrationPrideJoySource: Brazil national football teamShades and relatives of Xanthene
Xanthene dyes come in a range of colours, from yellow through pink to bluish red. Some well-known derivatives include fluorescein, which is greenish-yellow and highly fluorescent, and rhodamines, which are pink to red. Xanthene itself is distinct from related compounds like xanthone and xanthydrol.
Questions people ask about Xanthene
What colour is xanthene?
Xanthene is a yellow solid, though its derivatives can appear in a range of colours from yellow to bluish red.
Where does the name xanthene come from?
The name xanthene is linked to its chemical structure and relates to the Greek word for yellow.
What is xanthene used for?
Xanthene itself is not widely used, but its derivatives form the basis of many fluorescent dyes.
How are xanthene dyes made?
Xanthene dyes are made by condensing derivatives of phthalic anhydride with derivatives of resorcinol or 3-aminophenol.
Good reading and sources
The facts on this page come from the Wikipedia article "Xanthene", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). Rang rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes. The swatch is an approximation: named colours are not fixed standards, and every screen shows them a little differently. If something is wrong, tell us. Last refreshed 2026-10-03.
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