Shanghai Luowan Technology Development Co., Ltd. is located in Tianma Industrial Park, Songjiang District, Shanghai, and is an economic entity integrating production, scientific research, and business operations. The company's mission is "continuous innovation, quality first, fair pricing, and excellent service." The main product, p-toluenesulfonic acid, is of excellent quality and available in a complete range of specifications, including AR grade, CP grade, refined grade, specific grade, industrial premium grade, industrial grade, and foundry grade. Among these, the AR grade (analytical reagent) and CP grade (chemical pure) p-toluenesulfonic acid have seen significant improvements in both production volume and, most importantly, product quality stability due to the company's continuous innovation in production technology, striving to adopt new processes, technologies, and equipment. The product's appearance has achieved a pure white color with no impurities, and its intrinsic quality indicators—such as content, free acid, alcohol solubility, and impurity levels—all exceed the specified technical standards. It has received high praise from domestic and international customers and is widely used in chemical analysis, laboratory reagents, synthetic pharmaceuticals, pesticides, polymerization reactions, organic synthesis (esters) as a catalyst, intermediates for coatings, and resin curing agents. The company also produces liquid sulfonic acid curing agents specifically for the foundry industry, used in resin sand (furan resin sand, phenolic resin) molding and core curing. Additionally, it provides p-toluenesulfonic acid mother liquor for formulating liquid curing agents and foundry-grade p-toluenesulfonic acid to the foundry industry and manufacturers of liquid curing agents. The company has also developed and produces a series of nitrocellulose pulp products in various specifications. Approved by the Shanghai Administration of Work Safety, the company holds a production license for hazardous chemicals. Customers from industries such as coatings, inks, cosmetics, and adhesives are welcome to choose our products.