murphyUndecanoic Acid
AKA: 112-37-8, Hendecanoic acid, Undecylic acid, N-Undecanoic acid, N-Undecoic acid, N-Undecylic acid, Undecoic acid, 1-Decanecarboxylic acid
Synthetic
Cleanser
Emulsifier
Acid
Not Clean
OriginDerived from long-chain fatty acids in the chemical family of saturated carboxylic acids, typically sourced synthetically.
Synthesized through oxidation of undecanol or by fermentation processes using specific microorganisms on appropriate substrates.
Undecanoic acid is a straight-chain, eleven-carbon saturated medium-chain fatty acid found in body fluids; the most fungitoxic of the C7:0 - C18:0 fatty acid series. It has a role as an antifungal agent and a human metabolite. It is a straight-chain saturated fatty acid and a medium-chain fatty acid. It is a conjugate acid of an undecanoate. It derives from a hydride of an undecane.
Solubility 0.0522 mg/mL
Formula
C11H22O2
Mol. Weight
186.29
CAS #
112-37-8
Form
Liquid
State
Undecanoic acid is a white crystalline solid. Insoluble in water. Specific gravity 0.85. Hence floats on water.
Skin Types
●all-skin-types
Best For
Acne
Pregnancy & Breastfeeding Safe
Yes
Functions
Anti-Sebum
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Cleansing
Makes oil and water mix so dirt, makeup, and sunscreen can actually be washed away. The reason your face wash foams.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Anti Sebum
Surfactant Cleansing
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR