Indigoid dyes

Japanese: インジゴイド染料 - いんじごいどせんりょう(英語表記)indigoid dyes
Indigoid dyes
This refers to a group of vat dyes with properties and structure similar to indigo. There are indigo type, thioindigo type, and mixed type. These dyes are also included in the soluble reduced form of -ONa or -OSO 3 Na. The types of substituents used as indigo-thioindigo derivative dyes include -Cl, -Br, -CH 3 , -OCH 3 , and -OC 2 H 5. The thioindigo type is characterized by orange to red to purple, while the indigo type is characterized by blue. The method of reduction and solubilization involves reducing the dye with chlorosulfonic acid and zinc powder in pyridine to convert it into the ω-sulfonic acid form.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
インジゴと性質や構造が類似した一群の建染染料を指す。インジゴ型,チオインジゴ型,および混合型がある。またこれらの染料を-ONaまたは-OSO3Naの形の可溶性の還元型にしたものも含まれる。インジゴ・チオインジゴ誘導染料として使用される置換基の種類には,-Cl,-Br,-CH3,-OCH3,-OC2H5などがあげられる。チオインジゴ型は橙~赤~紫,インジゴ型は青色に特徴をもつ。還元可溶化の方法は,染料をピリジン中でクロロスルホン酸および亜鉛末で還元し,ω‐スルホン酸の形とする。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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