Iodopropynyl Butylcarbamate
Iodopropynyl butylcarbamate
- Role
- A preservative that protects the formula mainly against fungi and mould.
- Catalog formulas
- 7
- Type
- Stability
- Verified
- 09.11.2026
What does this ingredient do in an antiperspirant?
An iodine-containing carbamate that CosIng lists as a preservative. It is used in very small amounts, usually together with another preservative.
Part of a system, not a label in isolation
In the catalog it appears in roll-ons and a deodorant cream. It keeps the product in good condition until the end of its shelf life; it does not reduce sweat or odor.
In the EU it is permitted under Annex V of Regulation 1223/2009 (entry 56) with tiered limits: up to 0.02% in rinse-off products, 0.01% in leave-on products and 0.0075% in deodorants and antiperspirants. It may not be used in lip or oral products, in body lotions and body creams, or in leave-on products for children under three.
COSMILE Europe notes reported cases of dermatitis, but human studies showed a low irritation and sensitization potential even at concentrations 5 to 25 times above the permitted maximum. A 2017 review describes IPBC as an allergen with rising prevalence.
Not the same as Phenoxyethanol or parabens: it is a preservative from a different chemical class with far lower permitted concentrations.
Products containing Iodopropynyl Butylcarbamate
Links are based on the complete published INCI list for the exact product version.
Sources
The conclusions apply to the stated conditions and jurisdictions, not automatically to every concentration or product.
- CosIng Checker: Annex V, entry 56 (Iodopropynyl Butylcarbamate) Supports: permitted concentration, restrictions
- COSMILE Europe (CosIng data): Iodopropynyl Butylcarbamate Supports: function, irritation and sensitisation
- Deza, Giménez-Arnau: Allergic contact dermatitis in preservatives (2017) Supports: allergy prevalence