Chondroitin 4-sulfate sodium salt is widely used in the pharmaceutical and nutraceutical industries, primarily for its role in supporting joint health. It is a key ingredient in dietary supplements aimed at managing osteoarthritis, as it helps to reduce pain, improve joint function, and slow cartilage degradation. Additionally, it is utilized in the development of wound healing products due to its ability to promote tissue repair and regeneration. In cosmetic formulations, it is incorporated for its hydrating and skin-soothing properties, enhancing the texture and moisture retention of skincare products. Its biocompatibility also makes it suitable for use in biomedical applications, such as drug delivery systems and tissue engineering scaffolds.