Solvents
REACH
5-methyl-2-hexanone
CAS Number
110-12-3
EC Number
203-737-8
Abbreviation
MIAK
What is 5-methyl-2-hexanone?
5-Methyl-2-hexanone (CAS 110-12-3), commercially known as MIAK or methyl isoamyl ketone, is a mid-chain ketone solvent.
Where is 5-methyl-2-hexanone used?
- Industrial coatings and printing inks: coalescing solvent that improves flow and leveling and extends open time
- Metalworking and lubricants: incorporated by formulators
- Cleaning and degreasing compounds: carrier solvent with residue-free evaporation
- Personal care: nail care formulations and fragrance compositions
- Food and beverage: FEMA-approved flavoring agent delivering fruity and green top notes in confectionery, baked goods and beverages
- Its slow evaporation rate supports controlled drying and film formation.
Good to know: Flavor-grade specifications meet FCC requirements. Purity typically ranges from 98% to 99%+ depending on grade.
Commercial specifications
- Purity: 98% to 99%+ depending on grade
Other Names (Synonyms)
MIAK|Methyl isopentyl ketone|Methyl isoamyl ketone|Ketone, methyl isoamyl|Isopentyl methyl ketone|Isoamyl methyl ketone|5-Methylhexan-2-one [UN2302] [Flammable liquid]|5-Methylhexan-2-one
What are the physical properties of 5-methyl-2-hexanone?
Melting Point -74 °C
Boiling Point 144 °C
Density 0.888 g/cm³ @ Temp: 20 °C
Flash Point 106 °F
Appearance MIAK is a colorless liquid with a pleasant, fruity odor.
Color Clear colorless
Odor pleasant odor
Form Liquid
Water Solubility 5.4 g/L (20 ºC)
Vapor Pressure 4.5 mm Hg ( 20 °C)
Refractive Index n 20/D 1.406(lit.)
Log P 1.88 at 25℃
How is 5-methyl-2-hexanone classified and handled safely? Learn More
Warning
GHS02· Flammable GHS07· Irritant GHS08· Health Hazard
Hazard Statements
H226 Flammable liquid and vapor
H303 May be harmful if swallowed
H305 May be harmful if swallowed and enters airways
H320 Causes eye irritation
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 5-methyl-2-hexanone?
HS Code 29141910
UN Number 2302
ADR Class 3
Packing Group III
Storage Class 3 - Flammable liquids
WGK (Germany) 1