Functional Roles
Industries Served
Physical Properties
physical_description
Methyl isobutyl ketone appears as a clear colorless liquid with a pleasant odor. Flash point 73 u00b0F. Less dense than water. Vapors heavier than air.
color/form
Colorless liquid
odor
Faint, ketonic and camphor odor
boiling_point
243 to 244 u00b0F at 760 mmHg (NTP, 1992)
melting_point
-120.5 u00b0F (NTP, 1992)
flash_point
64 u00b0F (18 u00b0C) (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 68 u00b0F (USCG, 1999) - Less dense than water; will float
vapor_density
3.45 (NTP, 1992) - Heavier than air; will sink (Relative to Air)
vapor_pressure
5 mmHg at 67.5 u00b0F ; 10 mmHg at 86.0 u00b0F (NTP, 1992)
logp
log Kow = 1.31
stability/shelf_life
May form peroxides of unknown stability. Stable under recommended storage conditions.
autoignition_temperature
854 u00b0F (USCG, 1999)
heat_of_vaporization
40.61 kJ/mol at 25 u00b0C
surface_tension
23.6 dynes/cm = 0.0236 N/m at 20.0 u00b0C
ionization_potential
9.30 eV
odor_threshold
/Range of odor thresholds reported in the literature:/ Methyl isobutyl keonte - 0.410 mg/cu m (odor low) 192.7 mg/cu m (odor high).
refractive_index
Index of refraction: 1.3962 at 20 u00b0C/D
relative_evaporation_rate
1.6 (Butyl acetate = 1)
kovats_retention_index
729.5
other_experimental_properties
Maximum vapor concentration: 9,700 ppm at 20 u00b0C. Conversion factors: 1 ppm = 4.10 mg/cu m; 1 mg/L = 244 ppm at 25 u00b0C, 760 mm Hg
GHS / SDS Safety
Danger
Irritant
Health Hazard
Flammable
Acute Toxic
- H351: Suspected of causing cancer [Warning Carcinogenicity]
- H350: May cause cancer [Danger Carcinogenicity]
- H336 (11.5%): May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]
- H320: Causes eye irritation [Warning Serious eye damage/eye irritation]
- H335 (93.7%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H319: Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H351 (11.8%): Suspected of causing cancer [Warning Carcinogenicity]
- H331: Toxic if inhaled [Danger Acute toxicity, inhalation]
- H335: May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
- H319 (> 99.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
- H225: Highly Flammable liquid and vapor [Danger Flammable liquids]
- H332 (97.1%): Harmful if inhaled [Warning Acute toxicity, inhalation]
- H336: May cause drowsiness or dizziness [Warning Specific target organ toxicity, single exposure; Narcotic effects]
- H225 (> 99.9%): Highly Flammable liquid and vapor [Danger Flammable liquids]
- Not Classified
- H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
- H332: Harmful if inhaled [Warning Acute toxicity, inhalation]
- H303: May be harmful if swallowed [Warning Acute toxicity, oral]
- H305: May be harmful if swallowed and enters airways [Warning Aspiration hazard]
- H313: May be harmful in contact with skin [Warning Acute toxicity, dermal]
Chemical Identity
| CAS Number | 108-10-1 |
| IUPAC Name | 4-methylpentan-2-one |
| InChI Key | NTIZESTWPVYFNL-UHFFFAOYSA-N |
| PubChem CID | 7909 |
| INCI Name | MIBK |
Synonyms & Trade Names
Full Description
Methyl isobutyl ketone (MIBK) is a ketone solvent with the molecular formula C6H12O that provides effective solvency properties for industrial applications. This chemical serves as a solvent in coatings & construction and industrial manufacturing processes. MIBK has a boiling point of 243-244°F, a flash point of 64°F, and a density of 0.802 at 68°F.