443468
2-Butanone
ACS reagent, ≥99.0%
Synonym(s):
Ethyl methyl ketone, MEK, Methyl ethyl ketone
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About This Item
Linear Formula:
C2H5COCH3
CAS Number:
Molecular Weight:
72.11
EC Number:
201-159-0
UNSPSC Code:
12190000
MDL number:
Beilstein/REAXYS Number:
741880
grade
ACS reagent
vapor density
2.49 (vs air)
vapor pressure
71 mmHg ( 20 °C)
assay
≥99.0%
autoignition temp.
960 °F
expl. lim.
10.1 %
impurities
≤0.0005 meq/g Titr. acid, ≤0.20% water
evapn. residue
≤0.0025%
color
APHA: ≤15
refractive index
n20/D 1.379 (lit.)
bp
80 °C (lit.)
mp
−87 °C (lit.)
density
0.805 g/mL at 25 °C (lit.)
SMILES string
CC(CC)=O
InChI
1S/C4H8O/c1-3-4(2)5/h3H2,1-2H3
InChI key
ZWEHNKRNPOVVGH-UHFFFAOYSA-N
General description
2-Butanone (Methyl ethyl ketone, MEK), an aliphatic ketone, is considered as aprotic and protophilic solvent. The solvent composition plays an important role in the rate of liquid-phase catalytic hydrogenation of MEK to 2-butanol. The rate constant for the reaction of hydroxyl radicals with MEK has been determined and expressed in Arrhenius form as ΚC2H5COCH3+OH = 6.35*1013 exp(-2270/T) cm3mol-1s-1.
Application
2-Butanone may be used as an oxidizing agent for the conversion of primary alcohols to the corresponding aldehydes via Oppenauer oxidation in the presence of an iridium complex.
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signalword
Danger
hcodes
Hazard Classifications
Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3
target_organs
Central nervous system
supp_hazards
Storage Class
3 - Flammable liquids
wgk
WGK 1
flash_point_f
30.2 °F - closed cup
flash_point_c
-1 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter
Regulatory Information
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Densities and viscosities of binary liquid mixtures of 2-butanone with branched alcohols at (293.15 to 313.15)K.
Lomte SB, et al.
Journal of Chemical and Engineering Data, 54(1), 127-130 (2008)
High-Temperature Measurements of the Reactions of OH with a Series of Ketones: Acetone, 2-Butanone, 3-Pentanone, and 2-Pentanone.
Lam KY, et al.
The Journal of Physical Chemistry A, 116(23), 5549-5559 (2012)
Iridium-catalyzed Oppenauer oxidations of primary alcohols using acetone or 2-butanone as oxidant.
Suzuki T, et al.
The Journal of Organic Chemistry, 68(4), 1601-1602 (2003)