靛蓝胭脂红

靛蓝胭脂红，又称5,5′-靛蓝二磺酸钠，是由靛蓝磺化得到的有机物，可溶于水。在美国和欧盟，它可用作食用色素Summary of Color Additives for Use in United States in Foods, Drugs, Cosmetics, and Medical Devices , United States Food and Drug AdministrationCurrent EU approved additives and their E Numbers , Food Standards Agency, 26 November 2010，其E编码为E132。它也是一种pH指示剂.
参考文献

category:酸碱指示剂
category:氧化还原指示剂
Category:食用色素
Category:磺酸盐
Category:钠化合物
Category:吲哚
Category:有E编码的食品添加剂