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Aromatics

Azulene

Also known as Cyclopentacycloheptene, Azunamic, Bicyclo[5.3.0]decapentaene

CAS 275-51-4Formula C10H8Molar mass 128.17 g/molEC 205-993-6
GHS hazard pictograms. Pictograms: Hazardous to the environment 24 suppliers listed
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Azulene chemical structure, C10H8, CAS 275-51-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
275-51-4
Formula
C10H8
Molar mass
128.17 g/mol
EC number
205-993-6
HS code
290290
Category
Aromatics

What is Azulene?

Plain description, key identifiers and synonyms

Azulene is a mancude carbobicyclic parent consisting of a cycloheptatriene and cyclopentadiene rings. It has a role as a volatile oil component and a plant metabolite. It is an ortho-fused bicyclic arene, a member of azulenes and a mancude carbobicyclic parent.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
azulene
CAS number
275-51-4 CAS number cross-checkedOther or deprecated CAS: 82451-56-7
EC number
205-993-6
Molecular formula
C10H8
UNII
82R6M9MGLP
MDL number
MFCD00003810
INCI name
AZULENE
InChIKey
CUFNKYGDVFVPHO-UHFFFAOYSA-N
InChI
InChI=1S/C10H8/c1-2-5-9-7-4-8-10(9)6-3-1/h1-8H
SMILES (canonical and isomeric)
C1=CC=C2C=CC=C2C=C1

Synonyms

  • Cyclopentacycloheptene
  • Azunamic
  • Bicyclo[5.3.0]decapentaene
  • azulen
  • Bicyclo(5.3.0)decapentaene
  • Bicyclo(5.3.0)-deca-2,4,6,8,10-pentaene
  • Bicyclo(5.3.0)-1,3,5,7,9-decapentaene
  • Azulene (JAN)
  • Bicyclo[5.3.0]-1,5,7,9-decapentaene
  • Bicyclo-(5.3.0)-deca-2,4,6,8,10-pentaene
  • Azulene (Standard)
  • Azulene, 99%
  • bicyclo(5.3.0)-
  • Azulene, analytical standard
  • Azusalen [as sodium sulfonate]
  • Azulene, m.p. 99 c
  • Bicyclo(0.3.5)deca-1,3,5,7,9-pentaene
  • Azulene, standard for GC, >=99.0% (GC)
  • bicyclo[5.3.0]deca-2,4,6,8,10-pentaene
  • Bicyclo-(0.3.5)-deca-1,3,5,7,9-pentaene

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
128.17 g/molcalc.
Exact mass
128.0626 Dacalc.
LogP (octanol/water)
2.79calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
10calc.
Rings
2calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc2cccc-2cc1

c1ccc2cccc-2cc1

2 rings, 10 atoms. This chemical is the scaffold itself.

245 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • P391Collect spillage.
  • 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

Azulene suppliers

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

All 24 suppliers
24 of 24 offers
  • Amitychem Corporation
    ChinaUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
    View
  • Scandinavian Formulas, Inc.
    United StatesUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • 1st Scientific LLC
    China, NanjingUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • Aceschem Inc
    United States, FriscoUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • AChemBlock
    United States, HaywardUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • Achemo Scientific Limited
    China, KowloonUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • Ambinter
    France, OrleansUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • Angel Pharmatech Ltd.
    China, ShanghaiUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
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  • Avantor Inc.
    United States, Radnor ManufacturerUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
    View
  • Bic Biotech
    China, NanjingUnclaimed profile
    AzuleneGrade, purity and minimum order on request
    Price on request
    View

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

24 suppliers in 4 countries

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Azulene 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

Use classes: Cosmetics.

Cosmetic ingredient, INCI name AZULENE(skin conditioning, soothing)

Pharmacological actions

  • Anti-Inflammatory Agents, Non-Steroidal

Roles

  • eukaryotic metabolite
  • metabolite
  • plant metabolite
  • volatile oil component

Functional uses

  • Fragrance
  • Humectant
  • Softener and conditioner

Cosmetic functions

  • Skin conditioning
  • Soothing

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • EU cosmetic ingredient inventory

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 Azulene is traded under.

HS 2902.90Indicative HS code

Cyclic hydrocarbons, other

World exports in 2024
$612M
−6.1% vs 2023, imports $670M
2019 to 2024
Top exporters
  1. China28.0%
  2. Germany13.9%
  3. India * partner reported12.6%
Top importers
  1. Germany11.1%
  2. United States10.6%
  3. South Korea8.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Azulene, based on the data on this page

What is Azulene?

Azulene is a mancude carbobicyclic parent consisting of a cycloheptatriene and cyclopentadiene rings. It has a role as a volatile oil component and a plant metabolite. It is an ortho-fused bicyclic arene, a member of azulenes and a mancude carbobicyclic parent.

What is the CAS number of Azulene?

The CAS registry number of Azulene is 275-51-4. Other or deprecated CAS numbers: 82451-56-7.

What is the molecular formula and weight of Azulene?

The molecular formula of Azulene is C10H8 and its molar mass is 128.17 g/mol.

What is Azulene used for?

Use classes: Cosmetics.

Is Azulene hazardous?

Azulene has a GHS hazard classification. Main hazards: toxic to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Azulene?

Azulene is usually classified under HS code 290290 (Cyclic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Azulene?

CompoundList lists 24 suppliers of Azulene in China, United States, France and United Kingdom. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Azulene?

Suppliers quote Azulene 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 Azulene

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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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