Solvents
REACH
Methyl isobutyl ketone
CAS Number
108-10-1
EC Number
203-550-1
FEMA Number
FEMA 2731
Abbreviation
MIBK
What is Methyl isobutyl ketone?
Methyl isobutyl ketone (CAS 108-10-1), commonly known as MIBK, is a mid-boiling ketone solvent used in coatings, adhesives, and extraction processes.
Where is Methyl isobutyl ketone used?
- Industrial coatings and lacquers: dissolves nitrocellulose, epoxy, and vinyl resins for high-gloss finishes
- Adhesives: carrier solvent in contact cements and pressure-sensitive systems
- Plastics processing: cross-linking and curing solvent for rubber and synthetic resins
- At food-grade and FEMA 2731-approved purity it serves as a flavoring agent.
Good to know: Food-grade material must meet specific requirements for flavor use, including safety and quality protocols.
Commercial specifications
- Purity typically 99% and upward, depending on grade
- Food-grade and FEMA 2731-approved purity for flavor use
- Technical grade is the most common specification for industrial solvent applications
Other Names (Synonyms)
Shell mibk|Methylpentan-2-one|Methyl-isobutyl-cetone|Methyl I-butyl ketone|Isopropyl acetone|Isobutyl-methylketon|Isobutyl methyl ketone|Hexone|MIBK
What are the physical properties of Methyl isobutyl ketone?
Melting Point -85 °C
Boiling Point 115.8 °C @ Press: 760 Torr
Density 0.8042 g/cm³ @ Temp: 20 °C
Flash Point 56 °F
Appearance MIBK is a colorless liquid with a pleasant, sweet, fruity odor.
Color APHA: ≤15
Odor Pleasant; mild, characteristic; sharp; non-residual; ketonic.
Form Liquid
Water Solubility 17 g/L (20 ºC)
Vapor Pressure 15 mm Hg ( 20 °C)
Refractive Index n 20/D 1.395(lit.)
pH 7 (20°C)
Log P 1.3-1.9 at 20℃
How is Methyl isobutyl ketone classified and handled safely? Learn More
Danger
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard GHS06· Toxic
Hazard Statements
H225 Highly Flammable liquid and vapor
H303 May be harmful if swallowed
H305 May be harmful if swallowed and enters airways
H313 May be harmful in contact with skin
Precautionary Statements
P203 Obtain, consult and follow expert instructions for use.
P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 Keep container tightly closed.
P240 Ground and bond container and receiving equipment.
Which trade and regulatory codes apply to Methyl isobutyl ketone?
HS Code 2914 13 00
UN Number 1245
ADR Class 3
Packing Group II
Storage Class 3 - Flammable liquids
WGK (Germany) 1