Sodium Benzoate
⚠ EU RestrictedIdentification
CAS Number 532-32-1
EINECS / EC 208-534-8
CosIng Ref 37735
Chemical Name Sodium benzoate
Formula C7H5NaO2
Mol. Weight 144.1 g/mol
Function & Classification
Primary Function Preservative
Secondary Functions FRAGRANCE; PRESERVATIVE
Origin Synthetic
Category Preservatives
Manufacturer Lonza Group
EU Regulatory Status
Max Leave-on 0.5%
Max Rinse-off 0.5%
Restrictions Calculated as benzoic acid
Conditions of Use Max 0.5% (as benzoic acid equivalent). Not in oral care for children under 3 years.
Safety Profile
2 / 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 500 mg/kg bw/day (oral, rat) CIR 2021 / EFSA 2016
Sensitization Non-sensitizer
Genotoxicity Non-genotoxic
Phototoxicity Non-phototoxic
LD₅₀ Oral 1710 mg/kg (rat)
Skin Irritation (Draize) 0.3 / 4.0
Eye Irritation (Draize) 0.8 / 4.0
Formulation Guidelines
pH Stability 8 – 10
Solubility in all proportions (20 °C)
Benefits Natural-derived; food grade
Suppliers & Documents
Lonza Group 🇨🇭 Switzerland
Documents