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Hydrocarbons

1-Undecene

Also known as n-1-Undecene, 1-Hendecene, alpha-Undecylene

CAS 821-95-4Formula C11H22Molar mass 154.30 g/molEC 212-483-7
GHS signal word: Warning. Pictograms: Harmful or irritant 5 suppliers listed
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1-Undecene chemical structure, C11H22, CAS 821-95-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless liquid
Melting point
-49.2 °C
Boiling point
192.7 °C
Density
0.7503 @ 20 °C/4 °C
Flash point
71.1 °C
HS code
290129
Category
Hydrocarbons
Illustrative photo, clear colourless liquid in a glass reagent bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is 1-Undecene?

Plain description, key identifiers and synonyms

1-undecene is an alkene that is undecane containing one double bond located at position 1. It has a role as a plant metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
undec-1-ene
CAS number
821-95-4 CAS number cross-checkedOther or deprecated CAS: 29250-41-7
EC number
212-483-7
Molecular formula
C11H22
UNII
1446756A8F
MDL number
MFCD00008956
InChIKey
DCTOHCCUXLBQMS-UHFFFAOYSA-N
InChI
InChI=1S/C11H22/c1-3-5-7-9-11-10-8-6-4-2/h3H,1,4-11H2,2H3
SMILES (canonical and isomeric)
CCCCCCCCCC=C

Synonyms

  • n-1-Undecene
  • 1-Hendecene
  • alpha-Undecylene
  • alpha-Nonylethylene
  • alpha-Undecene
  • Undecene-1
  • n-Nonylethylene
  • Undec-1-ene
  • 1-Undecene, 97%
  • 3,4-dichlorophenethylalcohol

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Colorless liquidexp.
Odour
MILDexp.
Melting point
-49.2 °Cexp.
Boiling point
192.7 °Cexp.
Density
0.7503 @ 20 °C/4 °Cexp.
Flash point
71.1 °Cexp.
Solubility
Sol in ether, chloroform, ligroin, insol in waterexp.
Vapour pressure
0.493 mm Hg @ 25 °Cexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
154.30 g/molcalc.
Exact mass
154.1722 Dacalc.
LogP (octanol/water)
4.31calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
8calc.
Heavy atoms
11calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.82calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (20)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

1-Undecene suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 5 suppliers
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Where suppliers are based

5 suppliers in 1 country

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1-Undecene price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Roles

  • eukaryotic metabolite
  • metabolite
  • plant metabolite

How it is made

Catalytic oligomerization of ethylene followed by isomerization & disproportionation of c4-c8 & c20+ fractions to c11-c14 internal olefins, thermal cracking of paraffin waxes followed by fractionation to c11-c14 linear alpha-olefins

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 1-Undecene is traded under.

HS 2901.29Indicative HS code

Unsaturated, other

World exports in 2024
$2.65B
−3.2% vs 2023, imports $2.57B
2019 to 2024
Top exporters
  1. United States43.9%
  2. South Africa15.3%
  3. Qatar * partner reported9.0%
Top importers
  1. Singapore10.9%
  2. United States10.1%
  3. South Korea8.7%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 1-Undecene is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 1-Undecene, based on the data on this page

What is 1-Undecene?

1-undecene is an alkene that is undecane containing one double bond located at position 1. It has a role as a plant metabolite.

What is the CAS number of 1-Undecene?

The CAS registry number of 1-Undecene is 821-95-4. Other or deprecated CAS numbers: 29250-41-7.

What is the molecular formula and weight of 1-Undecene?

The molecular formula of 1-Undecene is C11H22 and its molar mass is 154.30 g/mol.

What is 1-Undecene used for?

Known uses and roles of 1-Undecene include building blocks in research and laboratory, eukaryotic metabolite, metabolite and plant metabolite.

Is 1-Undecene hazardous?

1-Undecene carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1-Undecene?

1-Undecene is usually classified under HS code 290129 (Unsaturated, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 1-Undecene?

CompoundList lists 5 suppliers of 1-Undecene in United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 1-Undecene?

Suppliers quote 1-Undecene on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 1-Undecene

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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