{"id":15458,"date":"2026-07-28T09:43:39","date_gmt":"2026-07-28T09:43:39","guid":{"rendered":"https:\/\/glabridinchina.com\/?p=15458"},"modified":"2026-07-28T09:45:39","modified_gmt":"2026-07-28T09:45:39","slug":"what-is-stearyl-glycyrrhetinate-technical-brief-anti-inflammatory-data-and-formulating-oil-soluble-licorice-derivatives","status":"publish","type":"post","link":"https:\/\/glabridinchina.com\/es\/what-is-stearyl-glycyrrhetinate-technical-brief-anti-inflammatory-data-and-formulating-oil-soluble-licorice-derivatives\/","title":{"rendered":"What Is Stearyl Glycyrrhetinate? Technical Brief, Anti-Inflammatory Data, and Formulating Oil-Soluble Licorice Derivatives"},"content":{"rendered":"
\n\n

\n estearilglicirretinato<\/a><\/strong> is the lipophilic ester derived from 18β-glycyrrhetinic acid and stearyl alcohol. While water-soluble licorice extracts like Dipotassium Glycyrrhizate dominate aqueous serums, they struggle to penetrate the hydrophobic stratum corneum. Esterifying glycyrrhetinic acid with a C18 fatty chain solves this limitation. The result is a lipid-compatible active ingredient designed for anhydrous systems, emulsions, and lipid-barrier repair formulas.\n <\/p>\n\n

\n\n

\n Chemical Profile and Molecular Structure\n <\/h2>\n\n
    \n
  • Nombre INCI:<\/strong> estearilglicirretinato<\/li>\n
  • CAS Number:<\/strong> 13832-70-7<\/span><\/li>\n
  • EINECS\/ELINCS Number:<\/strong> 419-580-5<\/span><\/li>\n
  • Molecular Formula:<\/strong> C48H82O4<\/li>\n
  • Peso Molecular:<\/strong> 723.16 g\/mol<\/li>\n
  • Chemical Structure:<\/strong> 18β-glycyrrhetinic acid 30-stearyl ester<\/li>\n <\/ul>\n\n
    \n CH3 CH3
    \n | |
    \n [ Glycyrrhetinic Acid Core ] — C(=O)—O—(CH2)17—CH3
    \n |
    \n O=C\n <\/div>\n\n

    \n Natural 18β-glycyrrhetinic acid contains a carboxylic acid group at the C-30 position. Esterification at C-30 with octadecanol (stearyl alcohol) increases lipophilicity (Log P = 6.2<\/span>). This change facilitates passage through intercellular epidermal lipids. Once inside the stratum corneum, endogenous esterases gradually cleave the ester bond, releasing free glycyrrhetinic acid for sustained biological activity.\n <\/p>\n\n

    \n Standard Certificate of Analysis (COA) Specifications\n <\/h2>\n\n

    The following table outlines the industrial raw material quality control criteria for cosmetics manufacturing:<\/p>\n\n

    \n \n \n \n \n \n \n \n \n \n \n \n \n \n
    Testing Item<\/th>\n Est\u00e1ndar de Especificaci\u00f3n<\/th>\n Resultado T\u00edpico del Lote<\/th>\n M\u00e9todo de Prueba<\/th>\n <\/tr>\n <\/thead>\n
    Apariencia<\/td>\n Polvo cristalino de color blanco a blanquecino<\/td>\n Polvo fino blanco<\/td>\n Visual inspection<\/td>\n <\/tr>\n
    Olor<\/td>\n Characteristic faint odor<\/td>\n Conform<\/td>\n Olfativo<\/td>\n <\/tr>\n
    Purity (Assay by HPLC)<\/td>\n ≥ 98.0%<\/td>\n 6%<\/td>\n HPLC (C18 column, UV 254 nm)<\/td>\n <\/tr>\n
    Punto de fusi\u00f3n<\/td>\n 70.0 °C – 77.0 °C<\/td>\n 73.5 °C – 75.0 °C<\/td>\n Capillary melting point apparatus<\/td>\n <\/tr>\n
    P\u00e9rdida por secado<\/td>\n \u2264 1.0%<\/td>\n 0.35%<\/td>\n 105 °C, 2 hours<\/td>\n <\/tr>\n
    Residuo en la ignici\u00f3n<\/td>\n ≤ 0.2%<\/td>\n 0.08%<\/td>\n Ignition at 600 °C<\/td>\n <\/tr>\n
    Metales pesados (como el plomo)<\/td>\n \u2264 10 ppm<\/td>\n < 5 ppm<\/td>\n ICP-MS<\/td>\n <\/tr>\n
    Ars\u00e9nico (As)<\/td>\n ≤ 2 ppm<\/td>\n < 1 ppm<\/td>\n AAS<\/td>\n <\/tr>\n
    Microbiological Testing<\/td>\n Total Plate Count < 100 CFU\/g<\/td>\n < 10 UFC\/g<\/td>\n ISO 21149 \/ ISO 16212<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

    \n Solubility Profile & Solvent Compatibility\n <\/h2>\n\n

    \n Unlike salt forms of glycyrrhizic acid, Stearyl Glycyrrhetinate is virtually insoluble in water (9 μg\/L at 20 °C<\/span>). It requires dissolved lipid carriers or warm organic solvents.\n <\/p>\n\n

    \n \n \n \n \n \n \n \n \n \n \n
    Solvent \/ Lipid Phase<\/th>\n Solubility at 25 °C<\/th>\n Solubility at 75 °C<\/th>\n Nota de formulaci\u00f3n<\/th>\n <\/tr>\n <\/thead>\n
    Agua<\/td>\n Insoluble<\/td>\n Insoluble<\/td>\n Unsuitable for direct aqueous phase<\/td>\n <\/tr>\n
    Ethanol (95%)<\/td>\n Slightly soluble<\/td>\n Soluble (~2.5%)<\/td>\n Precipitates if cooled rapidly in pure state<\/td>\n <\/tr>\n
    Caprylic\/Capric Triglyceride (MCT)<\/td>\n ~0.8% w\/w<\/td>\n > 5.0% w\/w<\/td>\n Ideal carrier oil for pre-dissolution<\/td>\n <\/tr>\n
    Escualano<\/td>\n ~0.5% w\/w<\/td>\n > 4.0% w\/w<\/td>\n Excellent lipid base for facial oils<\/td>\n <\/tr>\n
    Mineral Oil \/ Isohexadecane<\/td>\n ~0.4% w\/w<\/td>\n ~3.5% w\/w<\/td>\n Good compatibility in hydrocarbon systems<\/td>\n <\/tr>\n
    Jojoba Oil \/ Plant Oils<\/td>\n ~0.3% w\/w<\/td>\n > 3.0% w\/w<\/td>\n Requires heating above 75 °C to dissolve<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

    \n Biological Mechanisms & In-Vitro Performance Data\n <\/h2>\n\n

    \n Stearyl Glycyrrhetinate modulates inflammatory cascades primarily by inhibiting 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) and downstream arachidonic acid pathways.\n <\/p>\n\n

    1. Inhibition of Pro-Inflammatory Mediators<\/h3>\n

    \n Inflammatory stressors (UV radiation, chemical irritants, surfactant disruption) activate phospholipase A2. This enzyme releases arachidonic acid, converting it to prostaglandin E2 (PGE2) via cyclooxygenase-2 (COX-2).\n <\/p>\n\n

    \n

    In HaCaT Cell Culture Assays (stimulated with LPS 1 μg\/mL):<\/p>\n

      \n
    • PGE2 Suppression:<\/strong> IC50 value of 12.4 μM<\/span> (vs. 28.6 μM for Dipotassium Glycyrrhizate).<\/li>\n
    • Interleukin-6 (IL-6):<\/strong> Reduces IL-6 secretion by 54.2%<\/span> at 20 μM.<\/li>\n
    • TNF-α:<\/strong> Suppresses expression by 41.8%<\/span> at 20 μM.<\/li>\n <\/ul>\n <\/div>\n\n

      2. Antimicrobial Benchmarks (MIC Values)<\/h3>\n

      Broad-spectrum antimicrobial activity helps stabilize acne-prone and compromised skin microflora. Standard broth microdilution testing yields the following Minimum Inhibitory Concentrations (MIC):<\/p>\n

        \n
      • Cutibacterium acnes (ATCC 6919):<\/strong> MIC = 62.5 μg\/mL<\/span><\/li>\n
      • Staphylococcus aureus (ATCC 6538):<\/strong> MIC = 125 μg\/mL<\/span><\/li>\n
      • Staphylococcus epidermidis (ATCC 12228):<\/strong> MIC = 250 μg\/mL<\/span><\/li>\n <\/ul>\n\n

        3. In-Vivo Erythema Reduction Study<\/h3>\n

        \n A randomized split-face clinical test measured erythema reduction following sodium lauryl sulfate (SLS, 2% patch) irritation. Twenty subjects applied a formulation containing 0.2% Stearyl Glycyrrhetinate versus a placebo vehicle twice daily.\n <\/p>\n \n

        \n
          \n
        • Day 3:<\/strong> Skin redness decreased by 31.4%<\/strong> relative to baseline (measured via spectrophotometer a* value).<\/li>\n
        • D\u00eda 7:<\/strong> Redness decreased by 68.9%<\/strong>, with Trans-Epidermal Water Loss (TEWL) recovering 42% faster<\/strong> que el grupo placebo.<\/li>\n <\/ul>\n <\/div>\n\n

          \n Formulating with Stearyl Glycyrrhetinate\n <\/h2>\n\n

          \n Why choose Stearyl Glycyrrhetinate over traditional licorice salts? High concentrations of ionic salts like Dipotassium Glycyrrhizate can destabilize emulsion systems or break polymeric thickeners (such as Carbomer or Acrylates\/C10-30 Alkyl Acrylate Crosspolymer). Stearyl Glycyrrhetinate is non-ionic and lipophilic, making it completely neutral to emulsion viscosity.\n <\/p>\n\n

          Phase Processing and Heating Requirements<\/h3>\n
            \n
          1. Add Stearyl Glycyrrhetinate directly to the polar or medium-polar oil phase (MCT, C12-15 Alkyl Benzoate, or Squalane).<\/li>\n
          2. Heat the oil phase to 75 °C – 80 °C<\/strong> under moderate stirring until the powder dissolves completely into a clear liquid.<\/li>\n
          3. Perform emulsification with the water phase at equal temperature.<\/li>\n
          4. If cooling down rapidly, ensure the oil phase has enough solubilizing esters to prevent re-crystallization below 45 °C.<\/li>\n <\/ol>\n\n

            Suggested Dosage Matrix<\/h3>\n
            \n \n \n \n \n \n \n \n \n \n
            Application Type<\/th>\n Nivel de uso recomendado<\/th>\n Funci\u00f3n principal<\/th>\n <\/tr>\n <\/thead>\n
            Barrier Repair Creams & Balms<\/td>\n 0.1% – 0.5%<\/td>\n Soothing, anti-redness, lipid replenishment<\/td>\n <\/tr>\n
            Lip Balms & Lipsticks<\/td>\n 0.2% – 1.0%<\/td>\n Chapped lip repair, anti-inflammatory support<\/td>\n <\/tr>\n
            Sunscreen & After-Sun Care<\/td>\n 0.1% – 0.3%<\/td>\n Counteracting UV-induced erythema<\/td>\n <\/tr>\n
            Anhydrous Serums & Facial Oils<\/td>\n 0.05% – 0.2%<\/td>\n Daily calming for sensitive skin<\/td>\n <\/tr>\n
            Acne & Blemish Spot Treatments<\/td>\n 0.2% – 0.5%<\/td>\n Reducing localized inflammatory papules<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

            Synergistic Active Combinations<\/h3>\n
              \n
            • Bisabolol (0.2%) + Stearyl Glycyrrhetinate (0.1%):<\/strong> Combined inhibition of both 5-LOX and COX-2 pathways.<\/li>\n
            • Ceramide NP (0.1%) + Stearyl Glycyrrhetinate (0.2%):<\/strong> Rebuilds intercellular lipids while reducing sub-clinical barrier inflammation.<\/li>\n
            • Tocopherol (0.5%) + Stearyl Glycyrrhetinate (0.1%):<\/strong> Protects lipophilic active ingredients from oxidation while preventing squalene peroxidation on skin.<\/li>\n <\/ul>\n\n

              \n Comparative Analysis: Stearyl Glycyrrhetinate vs. Dipotassium Glycyrrhizate\n <\/h2>\n\n
              \n \n \n \n \n \n \n \n \n \n \n
              Caracter\u00edstica<\/th>\n estearilglicirretinato<\/th>\n glicirrizato dipot\u00e1sico<\/th>\n <\/tr>\n <\/thead>\n
              Solubilidad<\/td>\n Oil-soluble \/ Lipophilic<\/td>\n Water-soluble \/ Hydrophilic<\/td>\n <\/tr>\n
              Log P Value<\/td>\n 6.2<\/td>\n < -1.5<\/td>\n <\/tr>\n
              Skin Penetration Target<\/td>\n Stratum corneum & lipid matrix<\/td>\n Epidermal aqueous intercellular space<\/td>\n <\/tr>\n
              Impact on Viscosity<\/td>\n No effect on emulsion rheology<\/td>\n Can lower carbomer \/ gel viscosity at > 0.5%<\/td>\n <\/tr>\n
              Estabilidad T\u00e9rmica<\/td>\n Stable up to 85 °C in oil phase<\/td>\n Stable up to 80 °C in water phase<\/td>\n <\/tr>\n
              Ideal Product Format<\/td>\n Lipsticks, rich creams, oils, sunscreens<\/td>\n Toners, gels, sheet masks, aqueous serums<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

              \n Regulatory Status and Safety Assessment\n <\/h2>\n\n
                \n
              • US CIR (Cosmetic Ingredient Review):<\/strong> Assessed as safe for use in cosmetic formulations up to 1.0%<\/span>.<\/li>\n
              • EU SCCS \/ CosIng:<\/strong> Listed without specific restriction (Ref No: 38334); standard cosmetic safety limits apply.<\/li>\n
              • China NMPA (IECIC):<\/strong> Included in the Inventory of Existing Cosmetic Ingredients in China.<\/li>\n
              • Japan (Quasi-Drug Active):<\/strong> Approved as an active ingredient for anti-inflammatory and soothing claims within specified limits (0.1% – 0.5%<\/span>).<\/li>\n <\/ul>\n\n

                \n Phototoxicity and sensitization studies confirm that Stearyl Glycyrrhetinate exhibits zero phototoxic potential at 1.0% concentration. It passes standard Human Repeat Insult Patch Tests (HRIPT) with no observed irritation.\n <\/p>\n\n

                \n Packaging, Storage, and Handling\n <\/h2>\n\n
                  \n
                • Embalaje:<\/strong> Standard industrial supply comes in aluminum foil bags or fiber drums lined with double-layer polyethylene bags.<\/li>\n
                • Condiciones de almacenamiento:<\/strong> Keep containers tightly sealed in a cool, dry, and ventilated place (15 °C – 25 °C). Protect from direct sunlight and moisture.<\/li>\n
                • Duraci\u00f3n:<\/strong> 24 months from manufacturing date when stored in unopened original containers.<\/li>\n
                • Sample Requests:<\/strong> Pure grade production samples are available for research and R&D formulation trials upon request.<\/li>\n <\/ul>\n\n
                  \n\n

                  \n Literature & Scientific References\n <\/h2>\n\n
                    \n
                  1. Cosmetic Ingredient Review Expert Panel. (2007). Final Report on the Safety Assessment of Glycyrrhetinic Acid, its Salts, and Esters<\/em>. International Journal of Toxicology, 26(Suppl 2), 79–112.<\/li>\n
                  2. Shibata, S. (2000). A review of the anti-inflammatory actions of licorice and its active compounds<\/em>. Journal of the Pharmaceutical Society of Japan, 120(10), 849–862.<\/li>\n
                  3. Finney, R. S. H., & Somers, G. F. (1958). The anti-inflammatory activity of glycyrrhetinic acid and its derivatives<\/em>. Journal of Pharmacy and Pharmacology, 10(1), 613–620.<\/li>\n
                  4. Yokota, T., Nishio, H., Kubota, Y., & Mizoguchi, M. (1998). The inhibitory effect of licorice extract on melanogenesis and inflammation<\/em>. Pigment Cell Research, 11(6), 355–361.<\/li>\n
                  5. Inagaki, N., et al. (2006). Inhibitory effects of 18β-glycyrrhetinic acid derivatives on immediate and delayed-type hypersensitivity reactions<\/em>. Biological and Pharmaceutical Bulletin, 29(8), 1734–1739.<\/li>\n <\/ol>\n\n<\/div>","protected":false},"excerpt":{"rendered":"

                    Stearyl Glycyrrhetinate is the lipophilic ester derived from 18β-glycyrrhetinic acid and stearyl alcohol. While water-soluble licorice extracts like Dipotassium Glycyrrhizate dominate aqueous serums, they struggle…<\/p>","protected":false},"author":8,"featured_media":5752,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[60],"tags":[],"class_list":["post-15458","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-news"],"yoast_head":"\nWhat Is Stearyl Glycyrrhetinate? 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