DyStar, C.I. Vat Red 41, C.I. 73 300
|Molar mass||296.36 g·mol−1|
|Melting point||280 °C (536 °F; 553 K)|
|Solubility in ethanol, xylene||Soluble[vague]|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is: / ?)(|
Thioindigo is generated by the alkylation of the sulfur in thiosalicylic acid with chloroacetic acid. The resulting thioether cyclizes to 2-hydroxythianaphthene, which is easily converted to thioindigo. The related compound 4,7,4',7'-tetrachlorothioindigo, also a commercially important dye, can be prepared by chlorination of thioindigo.