A brown or metallic green dye, C20H 12o 7, used as a pH indicator and in dyeing textiles.
一种棕色或金属绿色染料，C20 H 12o 7，用作酸碱指示剂和用于给丝织物染色。
2
It is reacted with phenol to produce phenolphthalein, used as an indicator, a dye, and a pharmaceutical.
它与酚反应生产酚酞，可用作指示剂、染料和医药。
3
The liquid may comprise a translucent liquid such as water and the dye may comprise an indicator such as a water-based ink containing coloured dyes, dispersed pigments or other colouring media.