For professionals in the chemical and manufacturing industries, understanding the fundamental chemistry behind the materials they use is essential for optimizing product performance and troubleshooting. Solvent Red 135 (CAS 20749-68-2) is a complex organic compound widely utilized for its vibrant red color and excellent solubility. As a dedicated supplier of specialty chemicals, we aim to provide insight into the technical attributes that make this dye a valuable asset. Solvent Red 135, with the molecular formula C18H6Cl4N2O, belongs to the class of anthraquinone dyes. The presence of multiple chlorine atoms on the aromatic rings, coupled with the conjugated system of the anthraquinone core, contributes significantly to its intense color and stability. These structural features influence its absorption spectrum, which falls within the visible light range corresponding to red hues. The specific arrangement of these atoms and functional groups is what grants the dye its characteristic bright red appearance. Its classification as a 'solvent dye' indicates that it possesses good solubility in organic solvents, oils, and resins, rather than in water. This solubility is primarily governed by the non-polar nature of its molecular structure, allowing it to effectively disperse and dissolve within hydrophobic matrices. This characteristic is paramount for its application in plastics, where it needs to be uniformly distributed within the polymer melt, and in printing inks, where it must dissolve in the ink vehicle. The performance of Solvent Red 135 is further defined by its thermal stability and lightfastness. The robust molecular structure, including the stable anthraquinone core and the electron-withdrawing chlorine substituents, imparts resistance to degradation at elevated temperatures encountered during polymer processing, such as PET spinning. Similarly, its molecular architecture provides a degree of protection against photobleaching when exposed to UV radiation, ensuring color longevity. These properties are vital for manufacturers seeking reliable colorants for demanding environments. As a supplier, we ensure that our Solvent Red 135 meets stringent quality standards, typically offering a purity of 99% or higher. This high purity is crucial for predictable results, especially in applications like PET bottle coloration or advanced plastics where clarity and consistency are key. For businesses looking to buy Solvent Red 135, understanding these chemical underpinnings allows for more informed selection and application. In conclusion, the vibrant color and reliable performance of Solvent Red 135 are directly attributable to its carefully balanced chemical structure. Its anthraquinone base, halogenation, and overall molecular design enable its excellent solubility, thermal stability, and lightfastness, making it a critical colorant for industries ranging from textiles to automotive coatings. We encourage manufacturers to consult with us to leverage the technical advantages of this exceptional solvent dye.