Butylparaben
⚠ EU RestrictedIdentification
CAS Number 94-26-8
EINECS / EC 202-318-7
CosIng Ref 31734
Chemical Name butyl 4-hydroxybenzoate
IUPAC Name —
Formula C11H14O3
Mol. Weight 194.23 g/mol
SMILES CCCCOC(=O)C1=CC=C(C=C1)O
InChIKey QFOHBWFCKVYLES-UHFFFAOYSA-N
Function & Classification
Primary Function Preservative
Secondary Functions PRESERVATIVE
Origin Synthetic
Category Preservatives
EU Regulatory Status
Max Leave-on 0.14%
Max Rinse-off 0.14%
Restrictions 0.14% alone; 0.19% in paraben mixtures. Prohibited in nappy/diaper area products.
Conditions of Use Max 0.14% alone / max 0.14% combined with propylparaben. Not in leave-on products for children under 3 years.
Mandatory Warning Not to be used in leave-on products for children under 3 years of age.
SCCS Opinion View SCCS opinion →
Safety Profile
2 / 10
Skin Type Compatibility
Fungal Acne Safe ✓ Safe
Toxicology Profile
NOAEL 250 mg/kg bw/day (oral, rat) SCCS/1348/10 / CIR 2019
Sensitization Non-sensitizer
Genotoxicity Non-genotoxic
Phototoxicity Non-phototoxic
Dermal Absorption 20%
LD₅₀ Oral >2000 mg/kg (rat)
Skin Irritation (Draize) 0.3 / 4.0
Eye Irritation (Draize) 0.5 / 4.0
Source SCCS Opinion ↗
Formulation Guidelines
Usage level, pH range, solubility and addition phase not yet available.
Usage Level % · Addition Phase · Solubility
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