Vat Blue 36 is a

vat dye Vat dyes are a class of dyes that are classified as such because of the method by which they are applied. Vat dyeing is a process that refers to dyeing that takes place in a bucket or vat. The original vat dye is indigo, once obtained only from p ...

that is chemically related to

indigo Indigo is a deep color close to the color wheel blue (a primary color in the RGB color space), as well as to some variants of ultramarine, based on the ancient dye of the same name. The word "indigo" comes from the Latin word ''indicum'', m ...

. It is produced by

condensation Condensation is the change of the state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle. It can also be defined as the change in the state of water vapor to ...

of 4-methyl-5-chloro-7-methoxy-3-indolinone and 5,7–dichloro-3-(2H)-thianaphthenone.

References

Indigo structure dyes Vat dyes Benzothiophenes Chloroarenes Phenol ethers Indolines {{organic-compound-stub