Iodopropynyl Butylcarbamate
AKA “55406-53-6, 3-Iodo-2-propynyl butylcarbamate, Ipbc, Woodlife, Troysan KK-108A, 3-IODO-2-PROPYNYLBUTYLCARBAMATE, Caswell No. 501A, 3-iodoprop-2-yn-1-yl N-butylcarbamate, Butyl-3-iodo-2-propynylcarbamate
Preservative
Ingredient Facts
Iodopropynyl butylcarbamate
AKA: 55406-53-6, 3-Iodo-2-propynyl butylcarbamate, Ipbc, Woodlife, Troysan KK-108A, 3-IODO-2-PROPYNYLBUTYLCARBAMATE, Caswell No. 501A, 3-iodoprop-2-yn-1-yl N-butylcarbamate, Butyl-3-iodo-2-propynylcarbamate
Preservative · Preservative · EWG: 6
Synthetic
Preservative
Not Clean
3-Iodo-2-propynyl butylcarbamate
Solubility In water, 156 mg/L at 20 °C
Formula
C8H12INO2
Mol. Weight
281.09
CAS #
55406-53-6
Form
Powder
State
3-iodo-2-propynyl butylcarbamate is an off-white solid.
See origin →
Functions
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Preserves Formula
Antioxidant Protection
Reduces Inflammation
Locks In Moisture
Prevents microbial growth
Traditional Use
Synthesized in the mid-20th century as a broad-spectrum antimicrobial preservative for cosmetics and personal care products. Developed to replace older preservation systems with improved stability and efficacy.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
EWG
6
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
medical-approval
all-shades-safe
Phototoxicity Concern
Concentration Guide
0.02%
0%0%
Reg. Limit
EU regulatory limit: 0.02%. a) 0.02% b) 0.01% c) 0.0075%. a) Not to be used for children under three years of age (11) b) and c) Not to be used for children under three years of age (12) Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 56.
Regulatory Status
USApermitted
EUpermitted
JAPANpermitted
CANADApermitted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR