. This article provides a comprehensive overview of its properties, applications, and environmental impact. The article covers the chemical structure, physical and chemical properties, absorption and emission spectra, solubility, stability, and reactivity of Solvent Red 49. It also discusses its applications in various industries, including textiles, plastics, paints, inks, and paper. Finally, the article assesses the environmental impact of Solvent Red 49, including its toxicity, biodegradability, and potential for bioaccumulation. **Introduction:** Solvent Red 49 is a synthetic azo dye with the chemical formula C24H22N4O. It is a red powder with a melting point of 198-200°C and a molecular weight of 382.47 g/mol.. It has a strong absorption peak at 510 nm and a weaker absorption peak at 540 nm. **Properties:** Solvent Red 49 is a highly stable dye with excellent lightfastness and washfastness. It is also resistant to heat, acids, and alkalis. The dye has a high tinctorial strength and can produce a wide range of red shades. **Applications:** Solvent Red 49 is widely used in the textile industry for dyeing cotton, wool, silk, and synthetic fibers. It is also used in the plastics industry for coloring plastics, including polyethylene, polypropylene, and polystyrene. The dye is also used in the paints and inks industry for coloring paints, inks, and other printing materials.. **Environmental Impact:** Solvent Red 49 is a potential environmental pollutant. The dye is toxic to aquatic organisms and can bioaccumulate in the food chain. The dye is also persistent in the environment and can be difficult to remove from wastewater. **Conclusion:** Solvent Red 49 is a versatile and widely used dye with a wide range of applications. However, the dye is also a potential environmental pollutant. It is important to use Solvent Red 49 in a responsible manner and to minimize its environmental impact. **References:** 1.., Vol. 8, pp. 237-241. 2. Ullmann's Encyclopedia of Industrial Chemistry, 6th ed., Vol. 21, pp.. 3. The Merck Index, 14th ed., p. 1441. 4. Safety Data Sheet for Solvent Red 49, Sigma-Aldrich. 5. Toxicological Profile for Solvent Red 49, U.S. Environmental Protection Agency.