Description
Beta Arbutin
β-Arbutin (Beta-Arbutin) is a high-purity brightening ingredient (99.5%) manufactured by Kangcare Bioindustry Co., Ltd., China. It is a white crystalline powder that dissolves well in water. Chemically, it is a glucoside of hydroquinone linked to a glucose molecule via a β-glycosidic bond, which makes it significantly more stable and safer than regular hydroquinone.
It has a melting point of 199–201°C and a pH range of 5.0–7.0, which is close to the natural pH of the skin. β-Arbutin works by inhibiting tyrosinase, the key enzyme responsible for melanin production, helping reduce dark spots, melasma, and freckles while promoting a brighter and more even skin tone.
It is ideal for those seeking luminous, clearer-looking skin and a more uniform complexion through an effective and safe brightening active.
| Subject | Description |
|---|---|
| Appearance | White Crystalline Fine Powder |
| pH | 5.0 – 7.0 |
| Active ingredients | Beta-arbutin 99.5% |
| Applications | Cosmetic products |
| Suggested Concentration | N/A |
| Function | Protect Cream |
| INCI Name | α-Arbutin |
| Storage conditions | Store in a well-closed container away from moisture and direct sunlight. |
| Shelf-Life | 24 months if sealed and stored properly. |
β-Arbutin stands out with its chemical structure as a glucoside of hydroquinone, where a glucose molecule is linked to hydroquinone through a β-glycosidic bond. This structure makes it more stable than α-arbutin and safer than regular hydroquinone, which is known to have cytotoxic effects on skin cells.
β-Arbutin has a high purity of 99.5% and a specific rotation of –64° to –68°, which is characteristic of the true β-form structure. The product is highly stable, with moisture loss not exceeding 0.5%, and has a distinct melting point of 199–201°C, confirming its purity and quality. Importantly, it contains very low levels of free hydroquinone, not more than 10 ppm, ensuring safety for cosmetic use.
β-Arbutin dissolves well in water, making it easy to incorporate into various skincare formulations—especially serums, creams, and lotions. It has a pH range of 5.0–7.0, which is skin-friendly and non-irritating. When properly sealed and stored in a dry place away from direct sunlight, it maintains a shelf life of 2 years.
Mechanism of Action and Key Benefits
Active Ingredient: β-Arbutin (Beta-Arbutin)
Chemical Structure: β-Arbutin has the molecular formula C₁₂H₁₆O₇ and a molecular weight of 272.25. It is a glucoside of hydroquinone, consisting of one glucose molecule linked to hydroquinone through a β-glycosidic bond at the C-1 position of the glucose. This β-form structure is more stable than the α-form and has a specific rotation of –64° to –68°, which is a characteristic parameter confirming the purity of β-Arbutin.
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Mechanism of Action:
Tyrosinase Inhibition
β-Arbutin primarily works by inhibiting tyrosinase, the key enzyme involved in melanin production (melanogenesis). Tyrosinase converts L-tyrosine to L-DOPA and subsequently to dopaquinone, which are early steps in melanin synthesis. β-Arbutin binds to the enzyme’s active site, which contains copper ions (Cu²⁺), thereby reducing the enzyme’s activity and decreasing melanin formation.Competitive Inhibition
Because the hydroquinone portion of β-Arbutin structurally resembles L-tyrosine, the natural substrate of tyrosinase, β-Arbutin can compete with L-tyrosine for binding to the enzyme. When β-Arbutin occupies the active site instead of L-tyrosine, the melanin-formation pathway is inhibited.Controlled and Safe Release of Hydroquinone
When β-Arbutin comes into contact with the skin, the enzyme β-glucosidase gradually cleaves the β-glycosidic bond, slowly releasing hydroquinone in small, controlled amounts. The released hydroquinone is effective in inhibiting melanin formation, but because the release is slow and protected by the glucose molecule, β-Arbutin is far safer than regular hydroquinone, which can irritate or damage skin cells.Reduction of Existing Hyperpigmentation
In addition to preventing new melanin formation, β-Arbutin also helps reduce existing pigmentation by inhibiting the conversion of DOPA into melanin polymers, resulting in lighter pigment formation. By promoting cell turnover, it also accelerates the removal of melanin-rich skin cells.Safety & Stability
β-Arbutin is highly stable, as the β-glycosidic bond does not break down easily, preventing the excessive release of free hydroquinone at once. The product contains very low levels of free hydroquinone (<10 ppm), confirming its safety. β-Arbutin is also stable under light, heat, and cosmetic pH ranges (pH 5.0–7.0), making it suitable for formulations that require high stability.Non-Photosensitizing
β-Arbutin does not cause photosensitivity and can be used year-round, even under strong sunlight, without increasing the risk of hyperpigmentation or sunburn.
Benefits:
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Effectively inhibits melanin production
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Reduces dark spots, melasma, freckles, and post-acne marks
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Brightens and evens skin tone
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Safer than regular hydroquinone
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Highly stable; does not discolor or degrade easily
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Non-photosensitizing; suitable for year-round use
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Highly water-soluble and easy to formulate
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Suitable for all skincare products, especially serums, creams, lotions, and masks
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Skin-friendly pH range that does not cause irritation
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Research Study
A study conducted by the Department of Dermatology, Kyoto University compared the efficacy and safety of β-Arbutin with other skin-brightening agents such as α-arbutin and hydroquinone. The results showed that β-Arbutin is significantly more stable than α-arbutin, particularly under conditions involving light and heat, and is considerably safer than hydroquinone, as it does not cause skin irritation or cytotoxicity.
In vitro tests demonstrated that β-Arbutin effectively inhibits tyrosinase, with a low IC₅₀ value, indicating strong inhibitory activity. Studies on melanocyte cells further confirmed that β-Arbutin can significantly reduce melanin production without adversely affecting cell growth. Additionally, the presence of a β-glycosidic bond in β-Arbutin allows for the slow and controlled release of hydroquinone, enhancing its skin-brightening efficacy while minimizing the risk of side effects.
Reference
Sugimoto, K., et al. “Inhibitory effects of α- and β-arbutin on melanin synthesis in cultured human melanoma cells and a three-dimensional human skin model.” Biological and Pharmaceutical Bulletin, 2004, 27(4): 510-514
Product Safety and Warranty Information
- The product is manufactured through a certified process by leading organizations and has certification for industry standards that can be referenced.
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The product is safe and can be used to support the registration of a cosmetic product.
- The product is a raw material for industrial use, not a finished product. Users must have the knowledge and appropriate tools for using the raw material.
- The product is warranted according to the specifications, please refer to the terms and conditions for details.
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