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Olefins and dienes

1-Pentene

Also known as Pent-1-ene, Propylethylene, alpha-Amylene

CAS 109-67-1Formula C5H10Molar mass 70.14 g/molEC 203-694-5
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant, Serious health hazard 13 suppliers listed
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1-Pentene chemical structure, C5H10, CAS 109-67-1
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Liquid
Melting point
-165.2 °C
Boiling point
29.9 °C
Density
0.6405 @ 20 °C/4 °C
Flash point
-18 °C
HS code
290129
Category
Olefins and dienes
UN number
UN 1108
Illustrative photo, closed blue jerry cans in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 1-Pentene?

Plain description, key identifiers and synonyms

1-Pentene is a hydrocarbon.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
pent-1-ene
CAS number
109-67-1 CAS number cross-checkedOther or deprecated CAS: 25587-78-4
EC numbers
203-694-5, 271-255-5
Molecular formula
C5H10
UNII
ALP8M0LU81
MDL number
MFCD00003567
InChIKey
YWAKXRMUMFPDSH-UHFFFAOYSA-N
InChI
InChI=1S/C5H10/c1-3-5-4-2/h3H,1,4-5H2,2H3
SMILES (canonical and isomeric)
CCCC=C

Synonyms

  • Pent-1-ene
  • Propylethylene
  • alpha-Amylene
  • alpha-n-Amylene
  • 1-Pentylene
  • Pentene-1
  • 1-Amylene
  • 1-n-Pentene
  • pent-4-ene-1
  • 1-Pentene 95
  • 1-Pentene, 98%
  • Pentene, 1-n-
  • 1-Pentene, analytical standard
  • 1-Pentene, 99%
  • 1-Pentene, >=98.5% (GC)

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
Liquidexp.
Odour
HIGHLY DISAGREEABLEexp.
Melting point
-165.2 °Cexp.
Boiling point
29.9 °Cexp.
Density
0.6405 @ 20 °C/4 °Cexp.
Flash point
-18 °Cexp.
Autoignition temperature
275 °Cexp.
Solubility
In water, 148 mg/l @ 25 °Cexp.
Vapour pressure
635 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
70.14 g/molcalc.
Exact mass
70.0783 Dacalc.
LogP (octanol/water)
1.97calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
2calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.6calc.
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
Danger
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H224Extremely flammable liquid and vapour.
  • H304May be fatal if swallowed and enters airways.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (23)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P331Do not induce vomiting.
  • 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.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 1108
Transport hazard class
3
Packing group
I

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-Pentene suppliers

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

All 13 suppliers
13 of 13 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

13 suppliers in 4 countries

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1-Pentene price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Organic synthesis, blending agent for high octane motor fuel, pesticide formulations.

How it is made

Prepared from allyl bromide & ethyl-magnesium bromide in ether or better in dipropyl ether ...

Derived from natural gasoline

From light naptha (Synthol Process) with extraction.

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-Pentene 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-Pentene is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is 1-Pentene?

1-Pentene is a hydrocarbon.

What is the CAS number of 1-Pentene?

The CAS registry number of 1-Pentene is 109-67-1. Other or deprecated CAS numbers: 25587-78-4.

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

The molecular formula of 1-Pentene is C5H10 and its molar mass is 70.14 g/mol.

What is 1-Pentene used for?

Organic synthesis, blending agent for high octane motor fuel, pesticide formulations.

Is 1-Pentene hazardous?

1-Pentene carries the GHS signal word "Danger". Main hazards: extremely flammable liquid and vapour, may be fatal if swallowed and enters airways, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 1-Pentene?

1-Pentene 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-Pentene?

CompoundList lists 13 suppliers of 1-Pentene in United States, China, India and Switzerland. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy 1-Pentene in India?

3 suppliers in India list 1-Pentene on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of 1-Pentene?

Suppliers quote 1-Pentene 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-Pentene

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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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