Brother Enterprises Holding Co.,Ltd. is a diversified Chinese enterprise specializing in the manufacturing and global distribution of chemicals. The company operates through four principal business segments: Leather Chemicals, Vitamins, Flavors and Fragrances, and Active Pharmaceutical Ingredients (APIs). Within its Vitamins division, Brother Enterprises supplies a range of nutritional additives, including vitamin K3, vitamin B1, nicotinamide, niacin, vitamin B5, and alanine. The Leather Chemicals segment provides essential materials for the leather industry, such as chrome tanning agents, retanning agents, fatliquors, and various specialized additives. Under its API portfolio, the company manufactures contrast agent APIs, topiroxostat, and bespoke active pharmaceutical ingredients and intermediates tailored for therapeutic areas such as endocrine and metabolism disorders, nervous system conditions, and respiratory ailments. The Flavors and Fragrances division produces synthetic aromatic compounds like vanillin and ethyl vanillin, alongside other synthetic fragrances. These products find application in the food, daily chemical, and other industrial sectors. This segment also supplies turpentine. Furthermore, Brother Enterprises manufactures molecular sieves and catalysts, as well as several chromium-based compounds, including sodium dichromate, chromic acid, and additional chrome tanning agents. Established in 1991, the company was originally known as Haining Leather Chemicals Factory. Its headquarters are located in Haining, China.