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Ketone and ester solvents

5-Methyl-2-hexanone

Also known as 5-Methylhexan-2-one, 2-Hexanone, 5-methyl-, Isoamyl methyl ketone

CAS 110-12-3Formula C7H14OMolar mass 114.19 g/molEC 203-737-8
GHS signal word: Warning. Pictograms: Flammable, Harmful or irritant 15 suppliers listed
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5-Methyl-2-hexanone chemical structure, C7H14O, CAS 110-12-3
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless, clear liquid
Melting point
-73.9 °C
Boiling point
144 °C
Density
0.888 g/cm³ at 20 °C/20 °C
Flash point
36 °C
HS code
291419
Category
Ketone and ester solvents
UN number
UN 2302
Illustrative photo, clear liquid in a volumetric flask on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is 5-Methyl-2-hexanone?

Plain description, key identifiers and synonyms

5-methyl-2-hexanone is a ketone.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-methylhexan-2-one
CAS number
110-12-3 CAS number cross-checked
EC number
203-737-8
Molecular formula
C7H14O
UNII
6O4A4A5F28
MDL number
MFCD00008950
InChIKey
FFWSICBKRCICMR-UHFFFAOYSA-N
InChI
InChI=1S/C7H14O/c1-6(2)4-5-7(3)8/h6H,4-5H2,1-3H3
SMILES (canonical and isomeric)
CC(C)CCC(=O)C

Synonyms

  • 5-Methylhexan-2-one
  • 2-Hexanone, 5-methyl-
  • Isoamyl methyl ketone
  • Methyl isoamyl ketone
  • Isopentyl methyl ketone
  • MIAK
  • Methyl isopentyl ketone
  • 2-Methyl-5-hexanone
  • Ketone, methyl isoamyl
  • 3-Methylbutyl methyl ketone
  • Isobutylacetone
  • (CH3)2CHCH2CH2COCH3
  • 5-Methyl-2-hexanone, 99%
  • Methyl Isoamyl Ketone, 5-Methylhexan-2-one, 2-Methyl-5-Hexanone, Isopentyl Methyl Ketone
  • 5-Methyl-hexan-2-one
  • methylisoamyl ketone
  • 2-hexanone-5-methyl
  • methyl iso-amyl ketone
  • 4-01-00-03329 (Beilstein Handbook Reference)
  • 5-Methylhexan-2-one [UN2302] [Flammable liquid]
  • Methyl-2-hexanone, 5-
  • UN 2302
  • Methyl isoamyl ketone Solution in Acetone, 1000ug/mL

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
Colorless, clear liquidexp.
Odour
Pleasant, fruity odorexp.
Melting point
-73.9 °Cexp.
Boiling point
144 °Cexp.
Density
0.888 g/cm³ at 20 °C/20 °Cexp.
Flash point
36 °Cexp.
Autoignition temperature
191 °Cexp.
Solubility
In water, 5400 mg/L at 25 °Cexp.
Vapour pressure
5.77 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
114.19 g/molcalc.
Exact mass
114.1045 Dacalc.
LogP (octanol/water)
2.01calc.
Topological polar surface area
17.07 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
3calc.
Heavy atoms
8calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.86calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS02: Flammable
Flammable
GHS07: Harmful or irritant
Harmful or irritant
310NFPA 704 rating

Hazard statements

  • H226Flammable liquid and vapour.
  • H332Harmful if inhaled.
Precautionary statements (15)
  • 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.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P271Use only outdoors or in a well-ventilated area.
  • 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.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P317Get medical help.
  • 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.
UN number
UN 2302
Transport hazard class
3
Packing group
III

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

5-Methyl-2-hexanone suppliers

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Where suppliers are based

15 suppliers in 4 countries

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5-Methyl-2-hexanone 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

Industrial intermediate, used in manufacture of rubber antioxidants, in paints, lacquers and varnishes.

Solvent for nitrocellulose, cellulose acetate, butyrate, acrylics, and vinyl copolymers.

5-Methyl-2-hexanone is used as a solvent for the production of high-solids coatings.

Industrial uses: Solvent, Sealant (barrier).

Functional uses

  • Fragrance
  • Solvent

How it is made

Oxidation of 5-methyl-2-hexanol

5-Methyl-2-hexanone is produced by condensation of acetone with isobutyraldehyde. This reaction may be carried out in one or two steps, in the liquid or in the gas phase.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 606-026-00-4

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 5-Methyl-2-hexanone is traded under.

HS 2914.19Indicative HS code

Acyclic ketones without other oxygen function, other

World exports in 2024
$264M
+1.7% vs 2023, imports $308M
2019 to 2024
Top exporters
  1. China27.1%
  2. United States27.0%
  3. Germany10.5%
Top importers
  1. China22.8%
  2. United States13.0%
  3. India * partner reported10.7%

* Partner reported figures, a lower bound.

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

The HS code shown for 5-Methyl-2-hexanone is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 5-Methyl-2-hexanone, based on the data on this page

What is 5-Methyl-2-hexanone?

5-methyl-2-hexanone is a ketone.

What is the CAS number of 5-Methyl-2-hexanone?

The CAS registry number of 5-Methyl-2-hexanone is 110-12-3.

What is the molecular formula and weight of 5-Methyl-2-hexanone?

The molecular formula of 5-Methyl-2-hexanone is C7H14O and its molar mass is 114.19 g/mol.

What is 5-Methyl-2-hexanone used for?

Industrial intermediate, used in manufacture of rubber antioxidants, in paints, lacquers and varnishes. Solvent for nitrocellulose, cellulose acetate, butyrate, acrylics, and vinyl copolymers. 5-Methyl-2-hexanone is used as a solvent for the production of high-solids coatings.

Is 5-Methyl-2-hexanone hazardous?

5-Methyl-2-hexanone carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, harmful if inhaled. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 5-Methyl-2-hexanone?

5-Methyl-2-hexanone is usually classified under HS code 291419 (Acyclic ketones without other oxygen function, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 5-Methyl-2-hexanone?

CompoundList lists 15 suppliers of 5-Methyl-2-hexanone in United States, China, Germany and Poland. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of 5-Methyl-2-hexanone?

Suppliers quote 5-Methyl-2-hexanone 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 5-Methyl-2-hexanone

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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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