Rhodamine - rhodamine (English spelling)

Japanese: ローダミン - ろーだみん(英語表記)rhodamine
Rhodamine - rhodamine (English spelling)

A red basic dye with a xanthene skeleton. Rhodamine B is a representative example, but there are many derivatives such as Rhodamine 6G, 6GP, and 6G Extra. Soluble in water, ethanol (ethyl alcohol), and acetone. Soluble in sulfuric acid, but poorly soluble in hydrochloric acid and aqueous sodium hydroxide solution. In addition to dyeing wool, silk, nylon, cotton, and acrylic fibers, it is also used to color paper and miscellaneous goods. Its beautiful color tone makes it versatile. Rhodamine B is synthesized by condensing m(meta)-diethylaminophenol and phthalic anhydride. Lakes with metal salts are used as red organic pigments.

[Tobita Mitsuhiko]

[Reference] | Basic dyes
The structure of rhodamine
©Shogakukan ">

The structure of rhodamine


Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

キサンテン骨格をもつ赤色系塩基性染料。ローダミンBが代表的であるが、ローダミン6G、6GP、6Gエキストラなど多数の誘導体がある。水、エタノール(エチルアルコール)、アセトンなどに可溶。硫酸には溶けるが、塩酸、水酸化ナトリウム水溶液に難溶。羊毛、絹、ナイロン、木綿、アクリル繊維を染めるほか、紙、雑貨などの着色にも用いられる。色調が美しいので多方面に利用されている。ローダミンBはm(メタ)-ジエチルアミノフェノールと無水フタル酸とを縮合させて合成される。金属塩とのレーキは、赤色系有機顔料として用いられている。

[飛田満彦]

[参照項目] | 塩基性染料
ローダミンの構造
©Shogakukan">

ローダミンの構造


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