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Herbicides

Fluorene

Also known as 9H-Fluorene, Diphenylenemethane, o-Biphenylenemethane

CAS 86-73-7Formula C13H10Molar mass 166.22 g/molEC 201-695-5
GHS signal word: Warning. Pictograms: Hazardous to the environment 109 suppliers listed
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Fluorene chemical structure, C13H10, CAS 86-73-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Leaflets from alcohol
Melting point
114.8 °C
Boiling point
294 °C
Density
1.203 at 0 °C
Flash point
151 °C
HS code
290290
Category
Herbicides
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Fluorene?

Plain description, key identifiers and synonyms

Fluorene is an ortho-fused tricyclic hydrocarbon that is a major component of fossil fuels and their derivatives. It is an ortho-fused polycyclic arene and an ortho-fused tricyclic hydrocarbon.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
9H-fluorene
CAS number
86-73-7 CAS number cross-checkedOther or deprecated CAS: 95270-88-5
EC number
201-695-5
Molecular formula
C13H10
UNII
3Q2UY0968A
MDL number
MFCD00001111
InChIKey
NIHNNTQXNPWCJQ-UHFFFAOYSA-N
InChI
InChI=1S/C13H10/c1-3-7-12-10(5-1)9-11-6-2-4-8-13(11)12/h1-8H,9H2
SMILES (canonical and isomeric)
C1C2=CC=CC=C2C3=CC=CC=C31

Synonyms

  • 9H-Fluorene
  • Diphenylenemethane
  • o-Biphenylenemethane
  • 2,3-Benzindene
  • 2,2'-Methylenebiphenyl
  • o-Biphenylmethane
  • Methane, diphenylene-
  • Fluoren
  • alpha-diphenylenemethane-9H-fluorene
  • 9H-fluorene, fluorene
  • 2,2'-methylene biphenyl
  • flourene
  • Fluorene Standard
  • Fluorene, Reagent
  • Fluorene (Standard)
  • Fluorene, 98%
  • 9H fluorene
  • Fluorene, analytical standard
  • ghl.PD_Mitscher_leg0.1322
  • Fluorene, >=99.0% (HPLC)
  • Fluorene 10 |Ig/mL in Cyclohexane
  • Fluorene 10 |Ig/mL in Acetonitrile
  • Fluorene 10 microg/mL in Cyclohexane
  • Fluorene 100 |Ig/mL in Acetonitrile
  • Fluorene 10 microg/mL in Acetonitrile
Show all 30 synonyms
  • Fluorene 100 microg/mL in Acetonitrile
  • Fluorene Zone Refined (number of passes:70)
  • Fluorene, Zone Refined (number of passes:70)
  • Fluorene, certified reference material, TraceCERT(R)
  • 9H-Fluorene, 2,2'-Methylenebiphenyl, Diphenylenemethane, NSC 6787, o-Biphenylenemethane

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
Leaflets from alcoholexp.
Melting point
114.8 °Cexp.
Boiling point
294 °Cexp.
Density
1.203 at 0 °Cexp.
Flash point
151 °Cexp.
Solubility
In water, 1.69 mg/L at 25 °Cexp.
Vapour pressure
6.0 × 10⁻⁴ 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
166.22 g/molcalc.
Exact mass
166.0783 Dacalc.
LogP (octanol/water)
3.26calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
13calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.08calc.
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, c1ccc2c(c1)Cc1ccccc1-2

c1ccc2c(c1)Cc1ccccc1-2

3 rings, 13 atoms. This chemical is the scaffold itself.

25,265 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H400Very toxic to aquatic life.
  • H410Very toxic 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

Fluorene suppliers

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

All 109 suppliers
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Where suppliers are based

109 suppliers in 16 countries

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Fluorene price

Indicative price range per kg from live supplier offers

No published prices right now

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Uses and applications

What the substance is used for, by industry and function

Resinous products, dyestuffs.

Derivatives of fluorene show activity as herbicides and growth regulators.

Chemical intermediate in numerous misc applications & in formation of polyradicals for resins.

Use classes: Petroleum components.

Pharmacological actions

  • Carcinogens

How it is made

From acetylene and hydrogen in red-hot tube ... From charcoal by boiling with fuming HNO3 ... From 2,2'-dibromodiphenylmethane on boiling with hydrazine hydrate in presence of palladium.

By reduction of diphenylene ketone with zinc, from coal tar.

High-temperature coal tar contains on average 2% fluorene, which is recovered industrially by coal tar redistillation or by direct removal of a fluorene fraction during primary coal tar distillation followed by recrystallization of the fluorene fraction (dephenolated and debased if necessary), e.g., from solvent naphtha or naphtha.

Read more

Fluorene can be isolated from a greater than or equal to 60% fluorene fraction by continuous countercurrent crystallization. It is possible to refine the technical product further by reaction with sodium or sodium amide. Alternatively, purification is performed with sulfuric acid and subsequent crystallization from methanol. Fluorene is also synthesized from acetylene in a red-hot tube in the presence of hydrogen. It can be distilled from charcoal in the presence of fuming nitric acid or from refluxing 2,2'-dibromodiphenylmethane with hydrazine hydrate in the presence of palladium. Reduction of diphenylene ketone with zinc also forms fluorene.

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

Frequently asked questions

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

What is Fluorene?

Fluorene is an ortho-fused tricyclic hydrocarbon that is a major component of fossil fuels and their derivatives. It is an ortho-fused polycyclic arene and an ortho-fused tricyclic hydrocarbon.

What is the CAS number of Fluorene?

The CAS registry number of Fluorene is 86-73-7. Other or deprecated CAS numbers: 95270-88-5.

What is the molecular formula and weight of Fluorene?

The molecular formula of Fluorene is C13H10 and its molar mass is 166.22 g/mol.

What is Fluorene used for?

Resinous products, dyestuffs. Derivatives of fluorene show activity as herbicides and growth regulators. Chemical intermediate in numerous misc applications & in formation of polyradicals for resins. Use classes: Petroleum components.

Is Fluorene hazardous?

Fluorene carries the GHS signal word "Warning". Main hazards: very toxic to aquatic life, very 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 Fluorene?

Fluorene 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 Fluorene?

CompoundList lists 109 suppliers of Fluorene in China, United States, United Kingdom, Japan and 12 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Fluorene in India?

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

What is the price of Fluorene?

Suppliers quote Fluorene 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 Fluorene

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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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