Undecane is a straight-chain alkane with 11 carbon atoms.
How much products actually contain
No product states its amount yet.
Of the products containing it, 58 list it before the 1% line and 17 after it (usually 1% or less).
Products using this ingredient
12 of 74 confirmed · likeliest to carry enough first · See all 74
ILIAILIA Color Haze
Susanne KaufmannSusanne Kaufmann Face Oil
Olive & JuneOlive & June Cuticle Oil
Juvia's PlaceJuvia's Place I Am Magic Natural Radiance Foundation
MoroccanoilMoroccanoil Overnight Leave-in Mask
It's a 10It's a 10 It’s a 10 Scalp Restore Miracle Serum
philosophyphilosophy Lift & Firm Face & Neck Serum
VegamourVegamour HYDR-8 Weightless Repair Oil
VegamourVegamour HYDR-8 Weightless Repair Oil (Travel Size)
Not Your Mother'sNot Your Mother's Strengthening Oil
irecipeMild Hyaluronic Moist Up Sun Milk 50ml
BLITHEPressed Serum Gold Apricot
Definition
US FDA substance register · UNII JV0QT00NUE · registered name UNDECANE · single chemical substance
Undecane is a straight-chain alkane with 11 carbon atoms.
Source: PubChem
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
More data — names, identifiers, properties, test records, literature
Official labels & definitions
JCIA labelling name ウンデカン: 本品は、次の化学式で表される有機化合物である。
Source: JCIA labelling names (Japan)
Names & identifiers
- CAS No.chemical registry number
- 1120-21-4
- EC No.EU chemical inventory number
- 214-300-6
- DTXSIDUS EPA chemical ID
- DTXSID9021689
- DTXCIDUS EPA compound ID
- DTXCID301689
- IUPAC
- Undecane
- Molecular formula
- C11H24
- Molecular weight
- 156.313 g/mol
Measured properties
- Appearance
- liquid
- Colour
- colourless
- Melting/freezing point
- -26 ℃
- Initial boiling point and range
- 196 ℃
- Flash point
- 60 ℃(c.c.)
- Upper/lower flammability or explosive limits
- 6.5 / 0.6 %
- Vapour pressure
- 0.412 ㎜Hg ( (25 ℃))
- Vapour density
- 5.4
- Relative density
- 0.7
- n-Octanol/water partition coefficient (Kow)
- 6.50
- Auto-ignition temperature
- 240 ℃
- Viscosity
- 1.08 cP (25 C)
- Molecular weight
- 156.32
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 14 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.
- Intermediate3
- Lubricating agent3
- Softener and conditioner2
- Fuel2
- Fragrance2
- Solvent2
Source: US EPA CompTox dashboard
Irritation and sensitisation studies
7 skin studies and 3 eye studies are on record.
The studies disagree (the most common conclusion covers 38%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.
See all 10 studies
- Severe Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to - Classification not possible
Skin Sensitization · Screening - Classification not possible
Skin Irritation · Screening - Severe Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) according to - Studies Indicate No Significant Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to - Not likely to be sensitizing
skin sensitisation: in vivo (non-LLNA) · Screening · equivalent or similar to OECD Guideline 406 (Skin Sensitisation) - Moderate or Mild Irritation
skin irritation: in vivo · Screening · OECD Guideline 404 (Acute Dermal Irritation / Corrosion) equivalent or similar to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) equivalent or similar to - Studies Indicate No Significant Irritation
eye irritation: in vivo · Screening · OECD Guideline 405 (Acute Eye Irritation / Corrosion) according to - Classification not possible
Eye Irritation · Screening
Source: US EPA CompTox dashboard
Related literature
- The impact of UV-A and UV-B irradiation on hyperforin: stability and identification of degradation products · 2025
- Anti-Allergic and Anti-Inflammatory Effects of Undecane on Mast Cells and Keratinocytes · 2020
- RIFM fragrance ingredient safety assessment, undecane, CAS Registry Number 1120-21-4. · 2020
- A comparative study of synthetic approaches towards total synthesis of histrionicotoxin: a selective inhibitor of nicotinic acetylcholine receptors · 2020
- Biomedical Molecular Characteristics of YBSJ Extractives from Illicium Verum Fruit · 2013
Linked databases 20
- Australian Industrial Chemicals Inventory (AICIS)
- ChEBI
- ChEMBL
- China inventory of existing ingredients (IECIC)
- EU CosIng ingredient list 2
- JCIA labelling names (Japan)
- 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 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