¡ôHA is a natural biotic component widely presents in skin and other tissues. It has outstanding moisturizing effect, thus called Natural Moisturizing Factor (NMF) in the world. HA is the best component used in cosmetics for moisturizing from the nature.
¡ôWhen it is applied to skin, macromolecular HA can form a thin layer permeable to air, keeping the skin smooth and moist and further protecting it from bacteria, dust and ultraviolet rays, while micromolecular HA can penetrat into corium, enlarging blood capillaries slightly, promoting blood circulation, improving intermediary metabolism and nourishment-absorbing ability of skin, thus eliminating wrinkles, increasing skin's elasticity and delaying its aging. In addition, HA can further hyperplasia of epidermic cell, clean oxygen-derived free radicals, prevent and rehabilitate skin injuries. Its aqueous solution has very high viscosity which can make water become thicker. Cream made by emulsifying HA with oil is fine and even, homogeneous with stable emulsifiction.
¡ôHA is the best natural moisturizing component used in high-end cosmetics. Thanks to it¡¯s good compatibility, HA can be added to almost any beauty cosmetics, such as cream, lotion, astringent, essence, facial cleanser, shower gel, shampoo, hair conditioner, mousse and lip stick. In most cases, the dosage is around 0.05%-0.5%.
| Characteristics | |
| White or almost white, very hygroscopic grain or powder, without odor, turn to clear solution when dissolved in water; insoluble in ethanol, | |
| acetone and aether. | |
| Examination | |
| pH(1% water solution) | 6.0-7.5 |
| Transparency | ¡Ý99.0% |
| Loss on drying | ¡Ü10.0% |
| Kinematic viscosity | Practical value |
| Molecular weight | ¡Ý1.00¡Á106 |
| Protein | ¡Ü0.1% |
| Heavy metals(as Pb) | ¡Ü20ug/g |
| Assay | |
| Glucuronic Acid | ¡Ý44.0% |
| Sodium Hyaluronate | ¡Ý91.0% |
| Microbial Examination | |
| Bacteria counts | £¼10cfu/g |
| Mold&Yeast | £¼10cfu/g |
| Staphylococcus aureus | negative |
| Pseudomonas aeruginosa | negative |