Isobutylparaben
molecular structure · PubChem
AKA: Isobutyl 4-hydroxybenzoate, 4247-02-3, Isobutyl paraben, Isobutyl p-hydroxybenzoate, Isobutyl-4-hydroxybenzoate, Isobutyl parahydroxybenzoate, Benzoic acid, 2-methylpropyl ester, Isobutyl-p-hydroxybenzoate
Synthetic
Preservative
Not Clean
The CIR Expert Panel concluded that the following 20 parabens are safe in cosmetics in the present practices of use and concentration described in the safety assessment when the sum of the combined concentration of parabens in any given formulation does not exceed 0.8 %...Isobutylparaben
Effective at 0.03%
Formula
C11H14O3
Mol. Weight
194.23
CAS #
4247-02-3
Form
Powder
Functions
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Fights Bacteria
Traditional Use
Synthetic preservative developed in the mid-20th century as part of the paraben family. Created to prevent microbial contamination in cosmetic products with improved stability compared to earlier natural preservatives.
EWG
10
CIR
Safe as used
Pregnancy
Caution
Restricted By
CIR Safety Findings
medical-approval
all-shades-safe
Phototoxicity Concern
Concentration Guide
1.2e-05%
0.062%
0%2%
Reported use
CIR reported use: 0.000012-0.062
Regulatory Agencies
🧂Conflict of interest.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026 · 🧪 = conflict
Data: PubChem · CosIng · EWG · CIR