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Halogenated compounds

Bromocyclopentane

Also known as Cyclopentyl bromide, Cyclopentane, bromo-, cyclopentylbromide

CAS 137-43-9Formula C5H9BrMolar mass 149.03 g/molEC 205-294-6
GHS signal word: Warning. Pictograms: Flammable 26 suppliers listed
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Bromocyclopentane chemical structure, C5H9Br, CAS 137-43-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
137-43-9
Formula
C5H9Br
Molar mass
149.03 g/mol
Physical form
Liquid
HS code
290389
Category
Halogenated compounds
Illustrative photo, closed blue steel drums of liquid in a chemical plant
Typical packagingIllustrative packaging image, not the actual product

What is Bromocyclopentane?

Plain description, key identifiers and synonyms

Bromocyclopentane is a chemical substance with the molecular formula C5H9Br and a molar mass of 149.03 g/mol. Its CAS registry number is 137-43-9.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
bromocyclopentane
CAS number
137-43-9 CAS number cross-checked
EC number
205-294-6
Molecular formula
C5H9Br
UNII
QP65Z83BNY
MDL number
MFCD00001359
InChIKey
BRTFVKHPEHKBQF-UHFFFAOYSA-N
InChI
InChI=1S/C5H9Br/c6-5-3-1-2-4-5/h5H,1-4H2
SMILES (canonical and isomeric)
C1CCC(C1)Br

Synonyms

  • Cyclopentyl bromide
  • Cyclopentane, bromo-
  • cyclopentylbromide
  • 1-bromocyclopentane
  • bromo-cyclopentane
  • Cyclopentyl Bromide, NSC 1110
  • bromocyclopentan
  • cylopentylbromide
  • bromo cyclopentane
  • cyclopentyl-bromide
  • 4-bromocyclopentane
  • 1-bromo-cyclopentane
  • Bromocyclopentane, >=98%

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

Physical form
Liquidexp.

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
149.03 g/molcalc.
Exact mass
147.9888 Dacalc.
LogP (octanol/water)
2.32calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
0calc.
Heavy atoms
6calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
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, C1CCCC1

C1CCCC1

1 ring, 5 atoms, the Cyclopentane ring system.

10,985 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable

Hazard statements

  • H226Flammable liquid and vapour.
Precautionary statements (11)
  • 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.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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

Bromocyclopentane suppliers

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

All 26 suppliers
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Where suppliers are based

26 suppliers in 8 countries

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Bromocyclopentane 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

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 Bromocyclopentane is traded under.

HS 2903.89Indicative HS code

Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons, other

World exports in 2024
$92.3M
−2.2% vs 2023, imports $90.8M
2019 to 2024
Top exporters
  1. China40.4%
  2. Japan26.5%
  3. United Kingdom7.2%
Top importers
  1. South Korea19.2%
  2. Japan16.6%
  3. United States15.8%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Bromocyclopentane?

Bromocyclopentane is a chemical substance with the molecular formula C5H9Br and a molar mass of 149.03 g/mol. Its CAS registry number is 137-43-9.

What is the CAS number of Bromocyclopentane?

The CAS registry number of Bromocyclopentane is 137-43-9.

What is the molecular formula and weight of Bromocyclopentane?

The molecular formula of Bromocyclopentane is C5H9Br and its molar mass is 149.03 g/mol.

What is Bromocyclopentane used for?

Known uses and roles of Bromocyclopentane include building blocks in research and laboratory.

Is Bromocyclopentane hazardous?

Bromocyclopentane carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Bromocyclopentane?

Bromocyclopentane is usually classified under HS code 290389 (Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Bromocyclopentane?

CompoundList lists 26 suppliers of Bromocyclopentane in China, India, United States, Germany and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Bromocyclopentane in India?

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

What is the price of Bromocyclopentane?

Suppliers quote Bromocyclopentane 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 Bromocyclopentane

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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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