Methyl isobutyl ketone

Methyl isobutyl ketone
Skeletal formula of methyl isobutyl ketone
Ball-and-stick model of the methyl isobutyl ketone molecule
Names
Preferred IUPAC name
4-Methylpentan-2-one
Other names
4-Methyl-2-pentanone, Isopropylacetone, Hexone, Isobutyl methyl ketone, 2-Methylpropyl methyl ketone, 4-Methyl-2-oxopentane, MIK, Isobutylmethyl ketone, MIBK, Isohexanone
Identifiers
3D model (JSmol)
Abbreviations MIBK
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.003.228 Edit this at Wikidata
EC Number
  • 203-550-1
KEGG
RTECS number
  • SA9275000
UNII
UN number 1245
  • InChI=1S/C6H12O/c1-5(2)4-6(3)7/h5H,4H2,1-3H3 ☒N
    Key: NTIZESTWPVYFNL-UHFFFAOYSA-N ☒N
  • InChI=1/C6H12O/c1-5(2)4-6(3)7/h5H,4H2,1-3H3
    Key: NTIZESTWPVYFNL-UHFFFAOYAQ
  • CC(C)CC(=O)C
Properties
C6H12O
Molar mass 100.16 g/mol
Appearance colorless liquid
Odor pleasant[1]
Density 0.802 g/mL, liquid
Melting point −84.7 °C (−120.5 °F; 188.5 K)
Boiling point 117 to 118 °C (243 to 244 °F; 390 to 391 K)
1.91 g/100 mL (20 °C)
Vapor pressure 16 mmHg (20 °C)[1]
-70.05·10−6 cm3/mol
1.3958
Viscosity 0.58 cP at 20.0 °C
Structure
2.8 D
Hazards
GHS labelling:
GHS02: FlammableGHS07: Exclamation markGHS08: Health hazard
Danger
H225, H319, H332, H335, H351
P210, P233, P240, P241, P242, P243, P261, P264, P271, P280, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P312, P337+P313, P370+P378, P403+P233, P403+P235, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineInstability (yellow): no hazard codeSpecial hazards (white): no code
2
3
Flash point 14 °C (57 °F; 287 K)
449 °C (840 °F; 722 K)
Explosive limits 1.2–8.0% (93 °C)[1]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 100 ppm (410 mg/m3)[1]
REL (Recommended)
 TWA 50 ppm (205 mg/m3) ST 75 ppm (300 mg/m3)[1]
IDLH (Immediate danger)
 500 ppm[1]
Related compounds
Related ketones
 Methyl isopropyl ketone
2-Pentanone
Diisobutyl ketone
Related compounds
 2-Methylpentan-4-ol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Methyl isobutyl ketone (MIBK, 4-methylpentan-2-one) is an organic compound with the condensed chemical formula (CH3)2CHCH2C(O)CH3. This ketone is a colourless liquid that is used as a solvent for gums, resins, paints, varnishes, lacquers, and nitrocellulose.[2]

  1. ^ a b c d e f NIOSH Pocket Guide to Chemical Hazards. "#0326". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ United States Environmental Protection Agency (September 2016). "Methyl Isobutyl Ketone (Hexone)". Retrieved 2015-12-13.