Hyaluronic Acid is a naturally occurring polysaccharide and a widely used cosmetic ingredient for moisturising, hydration and skin-conditioning applications. Its INCI name is HYALURONIC ACID. It belongs to the glycosaminoglycan family and consists of repeating units of N-acetyl-D-glucosamine and D-glucuronic acid.
Hyaluronic Acid is particularly valued for its ability to bind and retain water. In cosmetic formulations, it is used primarily as a humectant and moisturising ingredient and is commonly found in serums, creams, lotions, facial-care products, eye-care formulations and masks.
Because Hyaluronic Acid is a polymer, it does not have one fixed molecular weight in the same way as a small-molecule cosmetic raw material. Commercial grades can be produced with different molecular-weight distributions, and this parameter can significantly affect viscosity, film formation, hydration characteristics and formulation performance.
Hyaluronic Acid has CAS Number 9004-61-9 and EC Number 232-678-0. Its polymeric formula is conventionally represented as (C₁₄H₂₁NO₁₁)n. The repeating disaccharide unit has a molecular weight of approximately 401.37 g/mol, but this should not be confused with the molecular weight of the complete polymer.
Hyaluronic Acid is structurally related to Sodium Hyaluronate, but the two should not be treated as identical raw materials. Sodium Hyaluronate is the sodium salt of the hyaluronic acid polymer and has a different chemical representation and molecular weight per repeating unit.
Commercial Hyaluronic Acid can be produced through biotechnology, including microbial fermentation, and cosmetic grades can be selected according to molecular-weight range and intended formulation performance.
Hyaluronic Acid functions primarily as a humectant, moisturising and skin-conditioning cosmetic ingredient. It can bind water and contribute to the hydration characteristics of cosmetic formulations. COSMILE Europe identifies humectant, moisturising, antistatic and skin-conditioning functions for Hyaluronic Acid.
Molecular weight is an important functional parameter. Higher-molecular-weight Hyaluronic Acid can form a hydrated film on the skin surface, while lower-molecular-weight materials have different hydration and formulation characteristics. Published cosmetic literature describes high-molecular-weight HA as film-forming and moisture-retaining, while different molecular-weight grades can provide different sensory and formulation properties.
For this reason, a cosmetic specification should identify the molecular-weight range instead of simply listing the product as “Hyaluronic Acid.”
Hyaluronic Acid is widely used in skin-care and personal-care formulations, including moisturising creams, facial serums, lotions, gels, eye-care products, facial masks and other hydration-focused products.
Its water-binding characteristics make it suitable for formulations designed to improve the moisture content and sensory feel of the skin. It can also contribute to the viscosity and film-forming properties of suitable aqueous formulations.
Different molecular-weight grades can be selected according to the intended product. A high-molecular-weight grade may be appropriate where film formation and surface hydration are desired, while lower-molecular-weight grades can provide different rheological and formulation characteristics.
Hyaluronic Acid is also compatible with many other moisturising and skin-conditioning ingredients, although formulation testing remains important because polymer behavior can be influenced by pH, ionic strength, electrolytes and processing conditions.
The molecular-weight distribution should be one of the primary specifications when selecting Hyaluronic Acid. It directly influences viscosity, hydration behavior, dispersion and finished-product texture.
Commercial Hyaluronic Acid grades can have substantially different molecular-weight ranges. Therefore, numerical values for assay, viscosity, moisture and molecular weight should not be transferred from one grade to another without confirmation.
The Assay (HPLC) field should also be treated carefully. Hyaluronic Acid is a polymer and its quality is generally characterized through parameters such as molecular weight, molecular-weight distribution, glucuronic acid content, loss on drying, protein content, viscosity and other applicable tests rather than treating it as a conventional small molecule with a single HPLC assay value.
A commercial cosmetic specification should therefore be linked to the exact molecular-weight grade and manufacturing process. Hygroscopicity and moisture exposure should also be controlled during storage and handling to maintain consistent powder characteristics.
Hyaluronic Acid is a high-value cosmetic ingredient for manufacturers developing moisturising, hydrating and skin-conditioning formulations. Its polymeric structure provides flexibility through different molecular-weight grades, allowing formulators to select material according to desired viscosity, film-forming and hydration characteristics.
For B2B cosmetic raw-material sourcing, the technical specification should clearly identify CAS number, molecular-weight range, polymer content, moisture, glucuronic acid content, protein, pH, viscosity and applicable microbiological and elemental specifications where relevant.
As a Hyaluronic Acid Cosmetic Ingredient Manufacturer in India, the focus is on controlled molecular-weight grades, consistent raw-material quality and suitability for bulk cosmetic and personal-care formulation requirements.
| Parameter | Specification |
|---|---|
| Appearance | White or colourless crystals / white powder |