Iodopropynyl Butylcarbamate (IPBC)CAS 55406-53-6
Wood-preservative and paint fungicide that releases iodine — skin sensitizer and thyroid-disruption concern.
Toxic Chemical Databases
Substance-specific listings — these flags are for Iodopropynyl Butylcarbamate alone, not for the broader family.
Chemical Type
Iodine-Releasing Carbamate Biocide
Chemical Description
IPBC is a synthetic carbamate fungicide whose biocidal action depends on iodine release. Used in oil-based wood preservatives, exterior paint, and personal-care products. That same iodine release is what raises thyroid concerns at chronic exposure — the thyroid is exquisitely sensitive to iodine balance. Skin-sensitization rates rose sharply through the 2010s as IPBC replaced older preservatives; it's now a top-15 contact allergen in European dermatology clinics.
Biological Activity
Severity scores specific to this substance, NOT the parent family average. Differences between siblings are real and meaningful.
Top Health Consequences
- Skin sensitization (rising clinical incidence)
- Thyroid hormone disruption potential from iodine release
- Respiratory irritation in aerosolized exposure
- Allergic contact dermatitis
Pathways of Exposure
- Dermal contact with treated wood surfaces
- Inhalation during oil-based paint or stain application
- Skin contact with personal-care products
Building Materials with Iodopropynyl Butylcarbamate
Listed alphabetically — product categories where this specific substance appears.
Cooling Tower Biocides
Exterior Wood Sealers
Latex Paint Preservation
Wood Stain & Preservatives