Brother Enterprises Holding Co.,Ltd. engages in the research and development, production, and sale of leather chemicals in China and internationally. It operates in six segments: Vitamins, Spices, Active Pharmaceutical Ingredients, Leather Chemicals, Chrome Salt, and Catalyst. The company offers vitamin nutritional additives, including vitamin K3, vitamin B1, nicotinamide, niacin, vitamin B5, and alanine; leather chemicals, such as chrome tanning agents, retanning agents, fatliquors, additives, etc.; and active pharmaceutical ingredients (API) comprising contrast agent APIs, topiroxostat, and the custom-made APIs and intermediates for endocrine and metabolism, nerves, respiratory, and other therapeutic areas.