Solvents - Oxygenated Available — Bulk Only

Methyl Isobutyl Ketone (MIBK)

CAS 108-10-1 · Formula C6H12O · MW 100.16 g/mol

A medium-boiling ketone solvent valued for strong solvency in coatings, adhesives, and metal-extraction processes. It dissolves gums, natural and synthetic resins, nitrocellulose, paints, varnishes, and lacquers, and is used as an extraction solvent for metals and in adhesive and coating manufacture.

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UN Number
UN 1245
Hazard Class
Class 3
HS Code
2914.13
At a Glance
Material Family
Solvents - Oxygenated
Record Type
Pure compound
Primary Role
Solvency · Cleaning / Degreasing
Functional Roles
MIBK
DENATURANTPERFUMINGSOLVENT
Applications & Use Cases
  • Coatings & lacquers: Solvent for paints, varnishes, lacquers, and nitrocellulose
  • Resin processing: Solvent for vinyl, epoxy, acrylic, and natural resins
  • Metal extraction: Extraction solvent in hydrometallurgy
  • Adhesives & inks: Solvent in adhesive and printing-ink formulations
  • Alcohol denaturant: Denaturant for rubbing alcohol
Physical Properties
Physical Description
Methyl isobutyl ketone appears as a clear colorless liquid with a pleasant odor. Flash point 23 °C. Less dense than water. Vapors heavier than air
Appearance
Colorless liquid
Odor
Faint, ketonic and camphor odor
Boiling Point
243 to 118 °C at 760 mmHg
Melting Point
-85 °C
Flash Point
18 °C (18 °C) (Closed cup)
Solubility
Water/air, blood/air, oil (olive oil)/air, oil/water, and oil/blood partition (or solubility) coefficients of methyl isobutyl ketone were measured by vial-equilibration in combination with gas chromatography. Partition coefficients for methyl isobutyl ketone: water/air: 79; blood/air: 90; oil/air: 926. The blood/air partition coefficients for ketones are almost in the same range as the water/air, irrespective of the oil/air partition coefficients
Density
0.802 at 20 °C
Vapor Density
3.45
Vapor Pressure
5 mmHg at 20 °C; 10 mmHg at 30 °C
LogP
log Kow = 1.31
Autoignition Temperature
457 °C
Heat of Vaporization
40.61 kJ/mol at 25 °C
Surface Tension
23.6 dynes/cm = 0.0236 N/m at 20.0 °C
Ionization Potential
9.30 eV
Odor Threshold
/Range of odor thresholds reported in the literature:/ Methyl isobutyl keonte
Refractive Index
Index of refraction: 1.3962 at 20 °C/D
Relative Evaporation Rate
1.6 (Butyl acetate = 1)
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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DOT / UN Transport Classification
DOT hazard class 3 placard
UN / DOT NumberUN 1245
Hazard Class / DivisionClass 3
Packing GroupII
Proper Shipping NameMethyl isobutyl ketone

Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.

HS / Tariff Classification
Harmonized System (HS) Code — 6-digit international heading
2914 . 13
Chapter 29
Organic chemicals
Heading 29.14
Internationally harmonized (WCO HS)
Subheading 2914.13
6-digit international code — national tariff line adds further digits
Chemical Identity
CAS Number
108-10-1
Molecular Formula
C6H12O
Molecular Weight
100.16 g/mol
IUPAC Name
4-methylpentan-2-one
INCI Name
MIBK
PubChem CID
InChI Key
NTIZESTWPVYFNL-UHFFFAOYSA-N
Synonyms & Trade Names
4-Methyl-2-pentanone METHYL ISOBUTYL KETONE 4-Methylpentan-2-one Isopropylacetone Isobutyl methyl ketone Hexone MIBK 2-Pentanone, 4-methyl- 2-Methyl-4-pentanone 4-Methyl-2-oxopentane Methylisobutylketon Isohexanone Hexon Metilisobutilchetone Metyloizobutyloketon Shell mibk Isobutyl-methylketon 2-Methylpropyl methyl ketone Isopropyl acetone Methyl-isobutyl-cetone
Full Description

Methyl isobutyl ketone (CAS 108-10-1), or MIBK, is an aliphatic ketone solvent. It dissolves gums, natural and synthetic resins, nitrocellulose, paints, varnishes, and lacquers, and is used as an extraction solvent for metals and in adhesive and coating manufacture.

Frequently Asked Questions

What is methyl isobutyl ketone used for?

MIBK (CAS 108-10-1) is an aliphatic ketone solvent for paints, varnishes, lacquers, and nitrocellulose; for vinyl, epoxy, acrylic, and natural resins; as an extraction solvent in hydrometallurgy; and in adhesives and printing inks. RawSource supplies it in bulk for coatings and process use.

What is another name for MIBK?

MIBK stands for methyl isobutyl ketone; it is also called 4-methyl-2-pentanone or isobutyl methyl ketone. The CAS number is 108-10-1 and the HS code is 2914.13.

Is MIBK the same as MEK?

No. MIBK is methyl isobutyl ketone (C6H12O, CAS 108-10-1); MEK is methyl ethyl ketone (C4H8O, CAS 78-93-3). MIBK is a larger, higher-boiling ketone with a slower evaporation rate, often chosen for stronger resin solvency in coatings.

How is MIBK shipped and classified for transport?

MIBK is a flammable liquid, UN 1245, and ships under the applicable DOT/IMDG flammable-liquid requirements. RawSource supplies it in drums, totes, and bulk with a CoA and SDS per shipment; see the SDS for GHS classification and handling.

What is the cost of bulk methyl isobutyl ketone?

Bulk MIBK pricing varies with volume, packaging, and freight. Request a bulk quote from RawSource with your target quantity and delivery location for current pricing and lead time.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.