Indigo dye, chemically known as Vat Blue 1 (CAS No. 482-89-3), is an organic compound with a distinctive blue color, foundational to the textile industry for centuries. Its unique chemical properties distinguish it from most other colorants, making it a subject of continuous research for advanced applications. The molecular structure of indigo (C16H10N2O2) and its ability to undergo reversible reduction and oxidation reactions are central to its function as a vat dye.

The insolubility of indigo in water and alcohol, coupled with its solubility in hot Aniline and other organic solvents like DMSO and chloroform, necessitates a specialized dyeing process. In its reduced form, leuco-indigo, it becomes soluble and colorless or yellowish-green, allowing it to penetrate textile fibers. Upon exposure to air, it rapidly oxidizes back to its vibrant, insoluble blue form, becoming permanently fixed to the fabric. This mechanism is critical for achieving the high colorfastness and lightfastness for which indigo is renowned.

Beyond traditional textile applications like cotton fabric dyeing and denim production, the unique characteristics of indigo dye have led to its exploration in advanced scientific fields. Researchers are investigating indigo and its derivatives for potential uses as organic semiconductors, as detailed in recent studies. Its low oral toxicity also makes certain sulfonated derivatives, like indigo carmine, applicable as food and pharmaceutical colorants, highlighting its versatility.

NINGBO INNO PHARMCHEM CO.,LTD. provides high-purity Vat Blue 1 Indigo Blue 94%, catering to both industrial requirements and specialized research endeavors. As a trusted textile dyestuff supplier, we understand the intricate chemical nuances that make indigo invaluable. Whether you need to buy Vat Blue 1 Indigo Blue 94% for large-scale manufacturing or for laboratory research into advanced indigo dye chemistry, our product meets rigorous purity and performance standards. Our commitment extends to supporting the evolving landscape of chemical applications for this remarkable blue pigment, enabling further innovation.