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.
Definition
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.
Source: PubChem
US FDA substance register · UNII 138ON3IIQG · registered name UNDECANOIC ACID · single chemical substance
Cosmetic roles
Safety & regulatory references
Not classified under Korea’s toxic-substance GHS list · existing chemical substance
Other restriction: ban substances that deplete the ozone layer
Source: EU CosIng ingredient list
Reviewed by CIR: Final Report: Safety Assessment of Fatty Acids and Fatty Acid Salts as Used in Cosmetics
More data — names, identifiers, properties, test records, literature
Names & identifiers
- CAS No.chemical registry number
- 112-37-8
- EC No.EU chemical inventory number
- 203-964-2
- DTXSIDUS EPA chemical ID
- DTXSID8021690
- DTXCIDUS EPA compound ID
- DTXCID001690
- IUPAC
- Undecanoic acid
- Molecular formula
- C11H22O2
- Molecular weight
- 186.295 g/mol
Measured properties
- Appearance
- solid
- Colour
- white
- Melting/freezing point
- 28.6 ℃
- Initial boiling point and range
- 280 ℃
- Flash point
- 128.2 ℃
- Vapour pressure
- 0.00151 ㎜Hg (25°C)
- Water solubility
- 52.2 ㎎/ℓ (30℃)
- Vapour density
- 6.430790472903004
- Relative density
- 0.909
- n-Octanol/water partition coefficient (Kow)
- 4.42
- Molecular weight
- 186.3
Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.
Source: KOSHA safety data sheets (Korea)
What products actually use it for
What the 12 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.
- Flavouring and nutrient2
- Soil amendments2
- Fragrance2
- Pharmaceutical (EPA)1
- Deodorizer1
- Surfactant (surface active agent)1
- Lubricating agent1
- Emulsifier1
1 other uses
- Cleaning agent1
Source: US EPA CompTox dashboard
Related literature
- Fatty Acid Profiling and Physiochemical Analysis of Citrus Sinensis (L) Oil · 2025
- In Vitro Evaluation of Essential Oils and Saturated Fatty Acids for Repellency against the Old-World Sand Fly, Phlebotomus papatasi (Scopoli) (Diptera: Psychodidae) · 2024
- Susceptibility to Medium-Chain Fatty Acids Is Associated with Trisomy of Chromosome 7 in Candida albicans · 2019
- Fatty Acid and Related Potassium Kv2 Channel Blockers: Toxicity and Physiological Actions on Mosquitoes · 2018
- Formulation and In Vitro Evaluation of Transdermal Patches of Melatonin · 2004
Linked databases 19
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- EU CosIng ingredient list 2
- Korea Cosmetic Association ingredient dictionary
- Korea toxic substances GHS register (NIER)
- KOSHA safety data sheets (Korea)
- MFDS (Korea) cosmetic ingredient register 2
- NIST Chemistry WebBook
- PubChem
- Tlooto literature search 2 3 4 5
- UniChem cross-reference IDs
- US Cosmetic Ingredient Review (CIR) 2
- US EPA CompTox dashboard 2
- US EPA DSSTox chemical database
- US FDA substance registration (GSRS)
- US FDA Unique Ingredient Identifier (UNII)
- Wikidata
- Wikipedia · Korean · English · Japanese · Chinese