Calcium Undecylenate
AKA “1322-14-1, Undecylenate calcium, CALCIUM UNDECENOATE, 77YW1RTU8V, CALCIUM 10-UNDECENOATE, CALCIUM UNDECENOATE (MART.), CALCIUM UNDECENOATE [MART.], CALCIUM UNDECYLENATE (USP MONOGRAPH), CALCIUM UNDECYLENATE [USP MONOGRAPH]”
Preservative
Ingredient Facts
Calcium undecylenate
AKA: 1322-14-1, Undecylenate calcium, CALCIUM UNDECENOATE, 77YW1RTU8V, CALCIUM 10-UNDECENOATE, CALCIUM UNDECENOATE (MART.), CALCIUM UNDECENOATE [MART.], CALCIUM UNDECYLENATE (USP MONOGRAPH), CALCIUM UNDECYLENATE [USP MONOGRAPH]
Preservative · Antimicrobial · EWG: 4
Synthetic
Preservative
Plant Oil
Not Clean
Calcium Undecylenate is the calcium salt of undecylenic acid, an 11 carbon mono-unsaturated fatty acid with broad-spectrum antifungal activity. Undecylenic acid inhibits the morphogenesis of Candida albicans to its invasive fungal form and inhibits the conversion of unicellular yeast to their hyphal form.
Formula
C22H38CaO4
Mol. Weight
406.60
CAS #
1322-14-1
Form
Powder
See origin →
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.
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Viscosity Controlling
Fights Bacteria
Traditional Use
Undecylenic acid has antifungal properties recognized in the early 20th century. The calcium salt form was developed for use in antifungal skincare and foot care products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
0.2%
0%0%
Reg. Limit
EU regulatory limit: 0.2%. Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 18.
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR