Kojic Acid
✓ EU AllowedIdentification
CAS Number 501-30-4
EINECS / EC 207-922-4
CosIng Ref 34801
Chemical Name 5-Hydroxy-2-hydroxymethyl-4-pyrone
Formula C6H6O4
Mol. Weight 142.11 g/mol
Function & Classification
Primary Function Active - Brightening
Secondary Functions BLEACHING
Origin Biotechnology
Category Actives
EU Regulatory Status
SCCS Opinion View SCCS opinion →
Safety Profile
6 / 10
Comedogenic Rating: 0/5
Will not clog pores — safe for acne-prone skin
Skin Type Compatibility
Acne-Prone ✓ Safe
Fungal Acne Safe ✓ Safe
Toxicology Profile
NOAEL 50 mg/kg bw/day (oral, rat, 13-week) SCCS/1622/20
Sensitization Non-sensitizer
Genotoxicity Inconclusive
Phototoxicity Non-phototoxic
Dermal Absorption 1.5%
LD₅₀ Oral 2500 mg/kg (rat)
Skin Irritation (Draize) 0.5 / 4.0
Eye Irritation (Draize) 1.0 / 4.0
Source SCCS Opinion ↗
Formulation Guidelines
Benefits Tyrosinase inhibition; skin lightening
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