Zinc Undecylenate
AKA “557-08-4, Zinc undecenoate, 388VZ25DUR, UNDECYLENATE ZINC, NSC-402438, ZINC UNDECENOATE (MART.), ZINC UNDECENOATE [MART.], ZINC UNDECYLENATE (EP MONOGRAPH), ZINC UNDECYLENATE [EP MONOGRAPH]
Ingredient
Ingredient Facts
Zinc undecylenate
AKA: 557-08-4, Zinc undecenoate, 388VZ25DUR, UNDECYLENATE ZINC, NSC-402438, ZINC UNDECENOATE (MART.), ZINC UNDECENOATE [MART.], ZINC UNDECYLENATE (EP MONOGRAPH), ZINC UNDECYLENATE [EP MONOGRAPH]
Ingredient · Antimicrobial · EWG: 4
Synthetic
Preservative
Not Clean
Zinc Undecylenate is a natural or synthetic fungistatic fatty acid, antifungal Zinc Undecylenate is used topically in creams against fungal infections, eczemas, ringworm, and other cutaneous conditions. The zinc provides an astringent action, reducing rawness and irritation. (NCI04)
Formula
C22H38O4Zn
Mol. Weight
431.90
CAS #
30773-48-9, 557-08-4
Form
Powder
State
Dry Powder
See origin →
Functions
Anticaking
Antimicrobial
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Opacifying
Fights acne
Causing bacteria
Quells irritation
Traditional Use
A synthetic zinc salt of undecylenic acid developed in the 20th century for antifungal cosmetic formulations. Created to address fungal skin conditions in deodorants and antiperspirant products.
Skin Types
all-skin-types
Best For
Acne
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR