- CAS No: 9004-61-9
- MW: The molecular weight of hyaluronic acid can vary widely depending on its size and molecular structure. 
- MF: (C14H21NO11)n
- EINECS No.: 232-678-0

Hyaluronic Acid (HA) is a naturally occurring polysaccharide found in the human body and various tissues of animals. It is particularly abundant in the skin, eyes, and synovial fluid of joints. Here are its primary functions and applications:

1. Hydration: One of the key functions of hyaluronic acid is its ability to retain water. It has a high water-binding capacity, capable of holding up to 1000 times its weight in water. This property makes it crucial for maintaining skin hydration and lubricating joints.

2. Lubrication: In synovial joints, hyaluronic acid acts as a lubricant, reducing friction between bones and facilitating smooth joint movement.

3. Skin Health: HA plays a significant role in maintaining skin health and youthfulness. It helps keep the skin moisturized, plump, and elastic, which can improve the appearance of fine lines and wrinkles.

4. Wound Healing: Hyaluronic acid is involved in the wound healing process, promoting tissue repair and reducing inflammation.

Hyaluronic Acid has a wide range of applications in various industries, including:

1. Skincare: It is a common ingredient in skincare products, such as moisturizers, serums, and masks, aimed at providing hydration and improving the skin's moisture barrier. It is particularly popular in anti-aging formulations for its skin-plumping effects.

2. Ophthalmology: It is used in eye drops and surgical procedures to lubricate the eyes and aid in the healing of eye-related conditions.

3. Joint Health: In the field of orthopedics, hyaluronic acid injections are used as a treatment for certain joint disorders, such as osteoarthritis, to alleviate pain and improve joint function.

4. Pharmaceutical and Medical Applications: HA is also used in various pharmaceutical and medical applications, including drug delivery systems and tissue engineering.