Solvent Green 7, scientifically known as trisodium 8-hydroxypyrene-1,3,6-trisulfonate, and identified by CAS number 6358-69-6, is a fascinating compound with a unique chemical structure that imbues it with its characteristic fluorescence and solubility. As a premier manufacturer and supplier of this dye from China, we aim to provide clarity on its chemical makeup and the importance of its specifications for industrial applications. Understanding these details helps potential buyers to confidently buy high-quality Solvent Green 7.

The molecular formula of Solvent Green 7 is C16H7Na3O10S3, with a molecular weight of approximately 524.39 g/mol. Its structure is derived from pyrene, a polycyclic aromatic hydrocarbon, which is further functionalized with hydroxyl and sulfonic acid groups, then neutralized to its trisodium salt form. This specific structure is responsible for its strong absorption in the visible spectrum and its subsequent emission of fluorescent light, typically in the yellow-green range. The presence of sulfonate groups renders it highly soluble in water, a critical characteristic for many of its applications.

The synthesis of Solvent Green 7 typically involves the sulfonation of pyrene followed by a hydroxylation process. While the exact proprietary methods may vary among manufacturers, the goal is always to achieve high purity. For industrial buyers, key quality indicators include appearance (yellow-green powder), strength (often specified as 120%+3%), low salt content (e.g., <14.5%), and minimal moisture (e.g., <0.5%). These specifications are crucial for ensuring consistent performance in color intensity, solubility, and overall product stability. A reputable supplier will readily provide Certificates of Analysis (CoA) detailing these parameters.

When you choose to purchase Solvent Green 7, especially from a Chinese manufacturer like ourselves, you benefit from advanced production techniques that optimize purity and yield. We are committed to rigorous quality control throughout the manufacturing process to ensure that our product meets the high standards demanded by industries using it for fluorescent inks, detergents, cosmetics, and as a water tracer. Our aim is to provide not just a chemical, but a reliable component that enhances your end products. We invite you to explore our offerings and inquire about our competitive price and supply capabilities.