Organic Acids
REACH
Kojic acid
CAS Number
501-30-4
EC Number
207-922-4
What is Kojic acid?
Kojic acid (CAS 501-30-4) is a naturally derived fungal metabolite produced through fermentation, used as a skin-brightening agent and antioxidant in cosmetic and food applications.
Where is Kojic acid used?
- Personal care: active component in skin-brightening creams and serums
- Spot-treatment products targeting hyperpigmentation, age spots and uneven skin tone
- Soap bars, a commercially significant product category
- Food processing: antioxidant and color-stabilizing agent preventing enzymatic browning in seafood, fruits and vegetables
- It also serves as a flavoring adjunct and preservative aid in certain fermented food systems.
Good to know: It functions by inhibiting melanin formation. Standard commercial grades include cosmetic-grade and food-grade (FCC) specifications.
Commercial specifications
- Purity typically 98% or higher, confirmed by HPLC testing
- Packaging from small quantities for specialty formulators to bulk bags for industrial buyers
Other Names (Synonyms)
5-hydroxy-2-(hydroxymethyl)-4H-pyran-4-one|5-hydroxy-2-(hydroxymethyl)-4-pyrone|5-hydroxy-2-(hydroxymethyl)pyran-4-one|4H-PYRAN-4-ONE, 5-HYDROXY-2-(HYDROXYMETHYL)-|acido kojico|2-Hydroxymethyl-5-hydroxy-gamma-pyrone|2-(Hydroxymethyl)-5-hydroxy-4H-pyran-4-one
What are the physical properties of Kojic acid?
Melting Point 153.5 °C
Boiling Point 179.65°C (rough estimate)
Density 1.1712 (rough estimate)
Appearance tan powder
Color White to beige-brown
Form Crystalline Powder
Water Solubility SOLUBLE
Refractive Index 1.4434 (estimate)
Log P -0.640
How is Kojic acid classified and handled safely? Learn More
Warning
GHS08· Health Hazard
Hazard Statements
H351 Suspected of causing cancer
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P318 IF exposed or concerned, get medical advice.
P405 Store locked up.
P501 Dispose of contents/container in accordance with local regulations.
Which trade and regulatory codes apply to Kojic acid?
HS Code 29329995
Storage Class 11 - Combustible Solids
WGK (Germany) 3