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Monomers

epsilon-CAPROLACTONE

Also known as Caprolactone, 6-Hexanolactone, 2-Oxepanone

CAS 502-44-3Formula C6H10O2Molar mass 114.14 g/molEC 207-938-1
GHS signal word: Warning. Pictograms: Harmful or irritant 98 suppliers listed Drug substance
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epsilon-CAPROLACTONE chemical structure, C6H10O2, CAS 502-44-3
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Melting point
-1.5 °C
Boiling point
237 °C
Density
1.07 g/cm³
Flash point
127 °C
HS code
293220
Category
Monomers
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is epsilon-CAPROLACTONE?

Plain description, key identifiers and synonyms

Hexano-6-lactone is a -lactone that is oxepane substituted by an oxo group at position 2.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
oxepan-2-one
CAS number
502-44-3 CAS number cross-checkedOther or deprecated CAS: 1219802-08-0
EC number
207-938-1
Molecular formula
C6H10O2
UNII
56RE988L1R
MDL number
MFCD00003267, MFCD00084404
InChIKey
PAPBSGBWRJIAAV-UHFFFAOYSA-N
InChI
InChI=1S/C6H10O2/c7-6-4-2-1-3-5-8-6/h1-5H2
SMILES (canonical and isomeric)
C1CCC(=O)OCC1

Synonyms

  • Caprolactone
  • 6-Hexanolactone
  • 2-Oxepanone
  • hexano-6-lactone
  • 6-Hexanolide
  • 1,6-Hexanolide
  • 1-Oxa-2-oxocycloheptane
  • Placcel M
  • 6-Hydroxyhexanoic acid lactone
  • Hexanoic acid, epsilon-lactone
  • Hexamethylene oxide, 2-oxo-
  • epsilon-Kaprolakton
  • epsilon caprolactone
  • TONE ECEQ
  • Hexanoic acid, 6-hydroxy-, epsilon-lactone
  • oxepan-2-one
  • Hexan-6-olide
  • E-Caprolactone
  • epsilon-Caprolactone monomer
  • 2-Oxacycloheptanone
  • 6-Caprolactone monomer
  • 2-oxohexamethylene oxide
  • e-Caprolactone--d6
  • 6-hydroxyhexanoic acid, epsilon-lactone
  • Hexanoic acid, 6-hydroxy-, lactone
Show all 33 synonyms
  • Polycaprolactone pound PCL pound(c)
  • epsilon-Hexalactone
  • PCL
  • 6-Hexanalactone
  • ?-Caprolactone
  • ECE
  • Dyed Polycaprolactone
  • 6-Hydroxycaproic aci

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.
Melting point
-1.5 °Cexp.
Boiling point
237 °Cexp.
Density
1.07 g/cm³exp.
Flash point
127 °Cexp.
Autoignition temperature
204 °Cexp.
Solubility
Solubility in water: miscibleexp.
Vapour pressure
1.35 × 10⁻¹ 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
114.14 g/molcalc.
Exact mass
114.0681 Dacalc.
LogP (octanol/water)
1.1calc.
Topological polar surface area
26.3 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
8calc.
Rings
1calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.83calc.
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, O=C1CCCCCO1

O=C1CCCCCO1

1 ring, 8 atoms. This chemical is the scaffold itself.

76 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H319Causes serious eye irritation.
Precautionary statements (4)
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P337 + P317If eye irritation persists: Get medical help.

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

epsilon-CAPROLACTONE suppliers

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

All 98 suppliers
30 of 30 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

98 suppliers in 14 countries

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epsilon-CAPROLACTONE 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

Intermediate in adhesives, urethane coatings & elastomers, solvent, diluent for epoxy resins, synthetic fibers, in org synthesis.

Industrial uses: Monomers, Intermediate.

Industries and functions

How it is made

Reaction product of peracetic acid & cyclohexanone, an intermediate product in manufacture of caprolactam.

Regulatory status

Inventories, regulations and trade controls that list this substance

Health and food

  • Active ingredient in FDA approved drug labels

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 epsilon-CAPROLACTONE is traded under.

HS 2932.20Indicative HS code

Lactones

World exports in 2024
$1.97B
−4.7% vs 2023, imports $2.07B
2019 to 2024
Top exporters
  1. China56.3%
  2. India * partner reported7.4%
  3. Germany7.3%
Top importers
  1. United States14.2%
  2. India * partner reported13.5%
  3. Brazil8.5%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about epsilon-CAPROLACTONE, based on the data on this page

What is epsilon-CAPROLACTONE?

Hexano-6-lactone is a -lactone that is oxepane substituted by an oxo group at position 2.

What is the CAS number of epsilon-CAPROLACTONE?

The CAS registry number of epsilon-CAPROLACTONE is 502-44-3. Other or deprecated CAS numbers: 1219802-08-0.

What is the molecular formula and weight of epsilon-CAPROLACTONE?

The molecular formula of epsilon-CAPROLACTONE is C6H10O2 and its molar mass is 114.14 g/mol.

What is epsilon-CAPROLACTONE used for?

Intermediate in adhesives, urethane coatings & elastomers, solvent, diluent for epoxy resins, synthetic fibers, in org synthesis. Industrial uses: Monomers, Intermediate.

Is epsilon-CAPROLACTONE hazardous?

epsilon-CAPROLACTONE carries the GHS signal word "Warning". Main hazards: causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of epsilon-CAPROLACTONE?

epsilon-CAPROLACTONE is usually classified under HS code 293220 (Lactones). This is indicative, confirm it with your customs broker before shipping.

Where can I buy epsilon-CAPROLACTONE?

CompoundList lists 98 suppliers of epsilon-CAPROLACTONE in United States, China, United Kingdom, Germany and 10 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy epsilon-CAPROLACTONE in India?

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

What is the price of epsilon-CAPROLACTONE?

Suppliers quote epsilon-CAPROLACTONE 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 epsilon-CAPROLACTONE

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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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