5-Hydroxy-2-(hydroxymethyl)-4H-pyrane-4-one

About 5-Hydroxy-2-(hydroxymethyl)-4H-pyrane-4-one

5-hydroxy-2-(hydroxymethyl)-4h-pyrane-4-one is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.

Detailed Analysis

Kojic acid (5-hydroxy-2-hydroxymethyl-4H-pyrane-4-one) is widely used as a skin lightening and brightening agent due to its tyrosinase inhibition activity, blocking melanin synthesis. The EU has implemented a concentration limit of 1% in cosmetic products, reflecting safety considerations. The H351 classification (suspected of causing cancer by inhalation) pertains primarily to occupational exposure to powder forms; topical cosmetic use remains permitted within the concentration restriction. Some sensitization and contact dermatitis cases have been reported in the literature, particularly with higher concentrations or improper use.

Skin Benefits

• ✓ Tyrosinase inhibitor - reduces melanin production
• ✓ Skin lightening and brightening effects
• ✓ Addresses hyperpigmentation and uneven skin tone
• ✓ Antioxidant properties in formulations

Known Concerns

• ⚠ H351 - suspected carcinogen (primarily inhalation route concern)
• ⚠ Skin sensitization and contact dermatitis reported
• ⚠ May cause skin irritation in some individuals
• ⚠ Concentration restricted to 1% maximum in EU
• ⚠ Photosensitization potential

References