High Quality Cosmetic Raw Materials Hyaluronic Acid Powder CAS 9004-61-9

1. Overview

Hyaluronic Acid (HA), also known as sodium hyaluronate ,  is a naturally occurring acidic glycosaminoglycan found in the human body and animal tissues. Its chemical formula is (C₁₄H₂₁NO₁₁)ₙ, composed of repeating disaccharide units of D-glucuronic acid and N-acetyl-D-glucosamine linked via β-1,3-glycosidic and β-1,4-glycosidic bonds, forming a long-chain polysaccharide structure.

Discovery and Structure:

• HA was first isolated in 1934 by Karl Meyer and his colleagues from Columbia University, who extracted it from bovine vitreous humor.
• It is a high-molecular-weight polymer with a unique molecular structure that contributes to its exceptional physicochemical properties.

Physicochemical Properties:

• Superior Hydration: HA can absorb and retain up to 1,000 times its weight in water, making it the most effective natural moisturizing substance discovered to date.
• Viscoelasticity: Its aqueous solutions exhibit high viscosity, enabling thickening of aqueous phases and stabilization of emulsions.
• Biodegradability: HA is degraded by hyaluronidases in the body into smaller molecules, which are eventually absorbed and metabolized.

Physiological Functions:

• Moisturization: As a natural moisturizing factor in the skin, HA increases water content, reduces wrinkles, and maintains a youthful, healthy appearance.
• Lubrication: In joints, HA acts as a lubricant and shock absorber, minimizing friction between articular surfaces and protecting cartilage.
• Cell Regulation: HA binds to cell-surface receptors, modulating cell proliferation, differentiation, and migration.
• Wound Healing: HA plays a critical role in tissue repair by promoting cell migration and proliferation, accelerating wound closure, and reducing scar formation.

2. Applications

Due to its unique properties, HA has found widespread applications across multiple fields:

1. Medical Aesthetics:

• Dermal Fillers: HA-based fillers are injected to correct facial wrinkles and volume loss (e.g., nasolabial folds, tear troughs, temples). Popular brands include Restylane and Juvéderm, offering natural-looking, long-lasting results.
• Mesotherapy ("Water Light Injections"): HA combined with nutrients is injected into the dermis to deeply hydrate and rejuvenate the skin, enhancing elasticity and radiance.
• Skincare Products: HA is widely used in creams, serums, and masks for its moisturizing, anti-wrinkle, and anti-aging effects.

2. Ophthalmology:

• HA serves as a viscoelastic agent in intraocular lens implantation surgery, protecting ocular tissues from surgical trauma.
• It is also used in eye drops to treat dry eye syndrome and other ocular surface disorders.

3. Orthopedics:

• HA is the primary component of synovial fluid, reducing joint friction and alleviating pain. Intra-articular HA injections are commonly used to treat osteoarthritis, improving joint mobility and reducing inflammation.

4. Other Medical Applications:

• Anti-Adhesion: HA-based products prevent postoperative adhesions, reducing surgical complications.
• Wound Healing: HA accelerates tissue repair and minimizes scarring when applied topically or injected into wounds.

5. Food Industry:

• Oral HA supplements are rapidly absorbed and widely distributed in the body, offering benefits such as hydration, improved bone and joint health, and gastric mucosal protection.
• In developed countries like the U.S. and Europe, HA is incorporated into functional foods and dietary supplements.

6. Pet Care:

• Recently, HA has expanded into the pet industry, with applications in functional pet foods, shampoos, and conditioners to enhance skin health and coat quality.