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Aromatics

Indene

Also known as 1H-Indene, Indonaphthene, Inden

CAS 95-13-6Formula C9H8Molar mass 116.16 g/molEC 202-393-6
GHS signal word: Danger. Pictograms: Flammable, Harmful or irritant, Serious health hazard, Hazardous to the environment 30 suppliers listed
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Indene chemical structure, C9H8, CAS 95-13-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Liquid
Melting point
-1.8 °C
Boiling point
181.6 °C
Density
0.9968 @ 20 °C/4 °C
Flash point
78.3 °C
HS code
290290
Category
Aromatics
UN number
UN 1993
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Indene?

Plain description, key identifiers and synonyms

1H-indene is an ortho-fused bicyclic arene comprising of benzene and cyclopentene rings. It is an ortho-fused bicyclic arene and an indene.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1H-indene
CAS number
95-13-6 CAS number cross-checkedOther or deprecated CAS: 71551-80-9, 9003-64-9
EC number
202-393-6
Molecular formula
C9H8
UNII
67H8Y6LB8A
MDL number
MFCD00003777
INCI name
INDENE
InChIKey
YBYIRNPNPLQARY-UHFFFAOYSA-N
InChI
InChI=1S/C9H8/c1-2-5-9-7-3-6-8(9)4-1/h1-6H,7H2
SMILES (canonical and isomeric)
C1C=CC2=CC=CC=C21

Synonyms

  • 1H-Indene
  • Indonaphthene
  • Inden
  • Indenyl radical
  • indene, (1H-indene)
  • Indene, 98%
  • Indene, reag
  • Indene, >=99%
  • Indene, analytical standard
  • Indene 10 |Ig/mL in Methanol
  • Indene 10 microg/mL in Methanol
  • Indene, contains 50-100 ppm tert-butylcatechol as stabilizer, technical grade, >=90%

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.
Melting point
-1.8 °Cexp.
Boiling point
181.6 °Cexp.
Density
0.9968 @ 20 °C/4 °Cexp.
Flash point
78.3 °Cexp.
Solubility
INSOL IN WATER, MISCIBLE WITH MOST ORGANIC SOLVENTSexp.
Vapour pressure
1.1 mm Hg at 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
116.16 g/molcalc.
Exact mass
116.0626 Dacalc.
LogP (octanol/water)
2.26calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
9calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.11calc.
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, C1=Cc2ccccc2C1

C1=Cc2ccccc2C1

2 rings, 9 atoms. This chemical is the scaffold itself.

579 other chemicals share this scaffold

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
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H226Flammable liquid and vapour.
  • H304May be fatal if swallowed and enters airways.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (24)
  • 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.
  • P391Collect spillage.
  • 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 1993

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

Indene suppliers

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All 30 suppliers
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Where suppliers are based

30 suppliers in 9 countries

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Indene 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

Used as a comonomer in coumarone and petroleum-derived aromatic hydrocarbon resins. Technical pure indene is used for the production of indan and its derivatives. Esters of indene-1-carboxylic acid, which are effective as acaricides, can be synthesized from indene for use in, eg, collars.

Industrial uses: Monomers.

Cosmetic ingredient, INCI name INDENE(perfuming)

Functional uses

  • Fragrance

Cosmetic functions

  • Perfuming

How it is made

From acetylene over activated charcoal @ 625 °c ... Manufacture from tetrahydronaphthalene by passing over sio2-al2o3 catalyst @ 670 °c

Pyrolysis residual oils from olefin production contain varying amounts of indene, which can be separated by extractive distillation with N-methyl-2- pyrrolidone or by crystallization. Indene is recovered industrially from dephenolated and debased tar light oil by rectifying distillation followed by crystallization. When the phenol extraction is omitted a highly concentrated indene fraction can also be obtained by azeotropic distillation of an indene- phenol fraction with water, whereby the phenol is separated as a bottom product.

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

Frequently asked questions

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

What is Indene?

1H-indene is an ortho-fused bicyclic arene comprising of benzene and cyclopentene rings. It is an ortho-fused bicyclic arene and an indene.

What is the CAS number of Indene?

The CAS registry number of Indene is 95-13-6. Other or deprecated CAS numbers: 71551-80-9, 9003-64-9.

What is the molecular formula and weight of Indene?

The molecular formula of Indene is C9H8 and its molar mass is 116.16 g/mol.

What is Indene used for?

Used as a comonomer in coumarone and petroleum-derived aromatic hydrocarbon resins. Technical pure indene is used for the production of indan and its derivatives. Esters of indene-1-carboxylic acid, which are effective as acaricides, can be synthesized from indene for use in, eg, collars. Industrial uses: Monomers.

Is Indene hazardous?

Indene carries the GHS signal word "Danger". Main hazards: 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 Indene?

Indene 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 Indene?

CompoundList lists 30 suppliers of Indene in China, United States, Japan, Bulgaria and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Indene in India?

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

What is the price of Indene?

Suppliers quote Indene 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 Indene

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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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