CompoundList

Caprolactam

Also known as azepan-2-one, epsilon-Caprolactam, 2-Oxohexamethylenimine

Caprolactam chemical structure, C6H11NO, CAS 105-60-2
2D chemical structure

Key facts

What buyers check first

Appearance
Hygroscopic leaflets from petroleum ether
Melting point
69.3 °C
Boiling point
270 °C
Density
1.02 at 75 °C/4 °C (liq)
Flash point
125 °C
HS code
293371
Category
Monomers
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Caprolactam?

Plain description, key identifiers and synonyms

Epsilon-caprolactam is a member of the class of caprolactams that is azepane substituted by an oxo group at position 2. It has a role as a human blood serum metabolite.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
azepan-2-one
CAS number
105-60-2 CAS number cross-checkedOther or deprecated CAS: 9012-16-2
EC numbers
203-313-2, 918-077-2, 919-537-5
Molecular formula
C6H11NO
UNII
6879X594Z8
MDL number
MFCD00006936, MFCD19226350
InChIKey
JBKVHLHDHHXQEQ-UHFFFAOYSA-N
InChI
InChI=1S/C6H11NO/c8-6-4-2-1-3-5-7-6/h1-5H2,(H,7,8)
SMILES (canonical and isomeric)
C1CCC(=O)NCC1

Synonyms

  • azepan-2-one
  • epsilon-Caprolactam
  • 2-Oxohexamethylenimine
  • 6-Caprolactam
  • Aminocaproic lactam
  • Hexahydro-2H-azepin-2-one
  • 6-Hexanelactam
  • 2-Oxohexamethyleneimine
  • 2-Azacycloheptanone
  • Hexanolactam
  • 2H-Azepin-2-one, hexahydro-
  • Hexahydro-2-azepinone
  • 2-Perhydroazepinone
  • 1,6-Hexolactam
  • Hexanone isoxime
  • Hexanonisoxim
  • Caprolattame
  • 2-Ketohexamethylenimine
  • Cyclohexanone iso-oxime
  • 2-Ketohexamethyleneimine
  • 1-Aza-2-cycloheptanone
  • Caprolactam monomer
  • Epsylon kaprolaktam
  • 6-Aminocaproic acid lactam
  • Extrom 6N
Show all 39 synonyms
  • Kapromine
  • hexannic acid
  • Stilon
  • e-Kaprolaktam
  • Hexamethylenimine, 2-oxo-
  • 1,6-Hexalactam
  • Capron PK4
  • 6-Aminohexanoic acid cyclic lactam
  • 2H-Azepin-7-one, hexahydro-
  • gamma-caprolactam
  • Hexanoic acid, 6-amino-, lactam
  • Hexanoic acid, 6-amino-, cyclic lactam
  • Lactam, aminocaproic
  • hexahydro 2H Azepin 2 one

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
Hygroscopic leaflets from petroleum etherexp.
Odour
Unpleasant odorexp.
Taste
UNPLEASANTexp.
Melting point
69.3 °Cexp.
Boiling point
270 °Cexp.
Density
1.02 at 75 °C/4 °C (liq)exp.
Flash point
125 °Cexp.
Autoignition temperature
375 °Cexp.
Solubility
In water, 5.25 × 10⁺⁶ mg/l @ 25 °C.exp.
Vapour pressure
6 mm Hg @ 120 °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
113.16 g/molcalc.
Exact mass
113.0841 Dacalc.
LogP (octanol/water)
0.68calc.
Topological polar surface area
29.1 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
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=C1CCCCCN1

O=C1CCCCCN1

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

420 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

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H332Harmful if inhaled.
  • H335May cause respiratory irritation.
Precautionary statements (20)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • 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.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • 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

Caprolactam suppliers

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

All 128 suppliers
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Where suppliers are based

128 suppliers in 27 countries

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Caprolactam 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

Mfr synthetic fibers of the polyamide type (Perlon), solvent for high mol wt polymers.

Manufacture of synthetic fibers (especially nylon 6), plastics, bristles, film, coatings, synthetic leather, plasticizers and paint vehicles, cross-linking agent for polyurethanes, synthesis of amino acid lysine.

Us FDA permits use of caprolactam ethylene-ethyl acrylate graft polymers as component of side seam cements intended for use in contact with food ...

Caprolactam is primarily used in the manufacture of synthetic fibers (especially Nylon 6). Caprolactam is also used in brush bristles, textile stiffeners, film coatings, synthetic leather, plastics, plasticizers, paint vehicles, cross-linking for polyurethanes, and in the synthesis of lysine.

Industrial uses: Dye, Intermediate, Catalyst, Processing aids not otherwise specified, Monomers, Solvent.

Consumer uses: Monomers, Dye, Intermediate, Catalyst, Soil amendments (fertilizers).

Industries and functions

Roles

  • animal metabolite
  • eukaryotic metabolite
  • human blood serum metabolite
  • human metabolite
  • mammalian metabolite
  • metabolite

Functional uses

  • Filler
  • Flavouring and nutrient
  • Monomers

How it is made

Catalytic hydrogenation of phenol to cyclohexanone, reaction with ammonia to cyclohexanone oxime with ammonia to cyclohexanone with Beckmann rearrangement with sulfuric acid catalyst, catalytic oxidation of cyclohexane with cyclohexanone, reaction with hydroxylamine sulfate and ammonia to cyclohexanone oxime followed by sulfuric acid catalyzed Beckmann rearrangement...

UV-catalyzed reaction of cyclohexane with nitrosyl chloride to cyclohexanone oxime hydrochloride, followed by Beckmann rearrangement

Catalytic oxidation of cyclohexane to cyclohexanol, reacting with peracetic acid to form caprolactone, and further reaction with ammonia.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-069-00-2

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 Caprolactam is traded under.

HS 2933.71Exact HS code

6-Hexanelactam (epsilon-caprolactam)

World exports in 2024
$1.07B
+9.6% vs 2023, imports $1.27B
2019 to 2024
Top exporters
  1. Belgium43.9%
  2. China27.7%
  3. Netherlands9.5%
Top importers
  1. Germany37.3%
  2. China17.9%
  3. Italy12.7%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Caprolactam is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Caprolactam?

Epsilon-caprolactam is a member of the class of caprolactams that is azepane substituted by an oxo group at position 2. It has a role as a human blood serum metabolite.

What is the CAS number of Caprolactam?

The CAS registry number of Caprolactam is 105-60-2. Other or deprecated CAS numbers: 9012-16-2.

What is the molecular formula and weight of Caprolactam?

The molecular formula of Caprolactam is C6H11NO and its molar mass is 113.16 g/mol.

What is Caprolactam used for?

Mfr synthetic fibers of the polyamide type (Perlon), solvent for high mol wt polymers. Manufacture of synthetic fibers (especially nylon 6), plastics, bristles, film, coatings, synthetic leather, plasticizers and paint vehicles, cross-linking agent for polyurethanes, synthesis of amino acid lysine.

Is Caprolactam hazardous?

Caprolactam carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Caprolactam?

Caprolactam is usually classified under HS code 293371 (6-Hexanelactam (epsilon-caprolactam)). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Caprolactam?

CompoundList lists 128 suppliers of Caprolactam in China, United States, India, United Kingdom and 23 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Caprolactam in India?

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

What is the price of Caprolactam?

Suppliers quote Caprolactam 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 Caprolactam

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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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