HYALURONIC ACID {SLMW (<50 kDA) CAS# 9067-32-7}

Super low molecular weight (SLMW) hyaluronic acid, characterized by a molecular mass under 50 kilodaltons (kDa) and identified by CAS registry number 9067-32-7, is a specialized linear glycosaminoglycan. Naturally composed of repeating disaccharide units of D-glucuronic acid and N-acetyl-D-glucosamine, hyaluronic acid is an essential structural element found natively within the extracellular matrix of human skin, connective tissues, and synovial fluid. This particular ultra-low molecular mass variant appears as a refined, highly purified white powder offering an assay purity of at least 95.0 percent. Unlike conventional high molecular weight polymers that form viscous surface films, this low-mass form is engineered to possess superior transdermal permeability and enhanced solubility. Produced predominantly through bio-fermentation processes utilizing non-animal bacterial strains, this pure raw material provides consistent physicochemical properties, including tightly controlled moisture content and low bioburden levels, making it exceptionally reliable for high-performance topical and cosmetic applications.

The distinctive biological action of super low molecular weight hyaluronic acid stems directly from its reduced polymer chain length, which allows deeper penetration across the stratum corneum compared to standard hyaluronic acid grades. Once inside the dermal layers, it acts as an active signaling molecule and potent humectant, capable of binding substantial amounts of water within the interstitial space to optimize tissue turgor. Scientific investigations indicate that low molecular weight fractions can interact with specific cell surface receptors, notably CD44, thereby stimulating fibroblasts to synthesize endogenous extracellular matrix components, including native high molecular weight hyaluronic acid, collagen, and elastin. Furthermore, clinical and preclinical studies demonstrate that SLMW hyaluronic acid supports the physiological repair cascade by promoting microvascular circulation, modulating inflammatory signaling, and strengthening the epidermal barrier. This targeted hydration and cellular activation deliver visible benefits, significantly improving skin elasticity, reducing the depth of fine lines, and attenuating visible signs of premature photoaging.

In advanced cosmetic formulation science, SLMW hyaluronic acid serves as an indispensable multifunctional active ingredient across a broad range of delivery systems. Formulators routinely integrate this versatile powder into intensive hydration serums, revitalizing facial creams, anti-aging lotions, eye treatments, and sheet masks, where its low viscosity and exceptional solubility prevent tackiness. Research emphasizes the efficacy of combining super low molecular weight fractions with medium and high molecular weight hyaluronate to create multi-depth hydration complexes that simultaneously address surface moisture loss and deep cellular hydration. Quality assurance parameters for this raw material, evidenced by minimum 95.0% purity specifications and stringent microbiological thresholds, ensure optimal compatibility with diverse cosmetic bases and emulsifiers. By avoiding animal-derived sources through advanced modern fermentation techniques, manufacturers achieve reproducible batch-to-batch stability and an exemplary safety profile. As cosmetic dermatology research continues to substantiate its role in dermal regeneration and sustained hydration, SLMW hyaluronic acid remains a foundational component of modern corrective skincare.