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Propanediol Dipelargonate
AKA “Pelemol P-99, Trimethylene dipelargonate, 1, 3-Propanediol, dinonanoate, Nonanoic acid, trimethylene ester, UNII-MI7SX74X8G, MI7SX74X8G, 3-propanediyl ester, Propanediol dipelargonate [INCI], 1'-(1, 3-propanediyl) ester”
Emollient
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Ingredient Facts
Propanediol dipelargonate
AKA: Pelemol P-99, Trimethylene dipelargonate, 1, 3-Propanediol, Dinonanoate, Nonanoic acid, Trimethylene ester, UNII-MI7SX74X8G, MI7SX74X8G, 3-propanediyl ester, Propanediol dipelargonate [INCI], 1'-(1, 3-propanediyl) ester
Emollient · Emollient · EWG: 4
Synthetic
Emollient
Skin Conditioner
Not Clean
Nonanoic acid, 1,1'-(1,3-propanediiyl) ester
Formula
C21H40O4
Mol. Weight
356.50
CAS #
28267-33-6
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Locks In Moisture
Traditional Use
Developed in the late 20th century as a synthetic ester. Designed as a lightweight emollient and sensory agent for modern cosmetic products.
Skin Types
●all-skin-types
Best For
Dryness
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
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Final report of the Cosmetic Ingredient Review Expert Panel on the safety assessment of Pelargonic Acid (nonanoic acid) and nonanoate esters
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
→
Propanediol Dipelargonate
European Commission
EU Cosmetic Ingredient Database (CosIng)
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Final report of the Cosmetic Ingredient Review Expert Panel on the safety assessment of pelargonic acid (nonanoic acid) and nonanoate esters.
Johnson W Jr, Heldreth B, Bergfeld WF, Belsito DV, Klaassen CD et al.
International journal of toxicology, 2011
→
Progress in 1,3-propanediol biosynthesis.
Li B, Gao W, Pan Y, Yao Y, Liu G
Frontiers in bioengineering and biotechnology, 2024
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Effects of 1,3-propanediol associated, or not, with butylene glycol and/or glycerol on skin hydration and skin barrier function.
Pinto JR, Monteiro E Silva SA, Leonardi GR
International journal of cosmetic science, 2024
→
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR