Chemical Identification and Use for Thioindigo

Molecular formula: C16H8O2S2

Molar mass: 296.36 g mol−1

Appearance: Red solid

Melting point:280 °C, 553 K, 536 °F

 

Solubility in water: Insoluble

 

Thioindigo is an organosulfur admixture that is acclimated to dye polyester fabric. A constructed dye, thioindigo is accompanying to the plant-derived dye indigo, replacing two NH groups with two sulfur atoms.

 

Thioindigo is generated by the alkylation of the sulfur in thiosalicylic acerbic with chloroacetic acid. The consistent thioether cyclizes to 2-hydroxythianaphthene, which is calmly adapted to thioindigo. The accompanying admixture 4,7,4',7'-tetrachlorothioindigo, aswell a commercially important dye, can be able by chlorination of thioindigo.

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