443468

2-Butanone

ACS reagent, ≥99.0%

• Synonym(s): Ethyl methyl ketone, MEK, Methyl ethyl ketone
• Linear Formula: C₂H₅COCH₃
• CAS Number: 78-93-3
• Molecular Weight: 72.11
• Beilstein: 741880
• EC Number: 201-159-0
• MDL number: MFCD00011648
• UNSPSC Code: 12190000

Properties

• 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

Description

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 Κ_C2H5COCH3+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.

Safety Information

• Pictograms: GHS02,GHS07
• Signal Word: Danger
• Hazard Statements: H225,H319,H336
• Precautionary Statements: P210 - P233 - P240 - P241 - P242 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3
• Target Organs: Central nervous system
• Supplementary Hazards: EUH066
• Storage Class Code: 3 - Flammable liquids
• WGK: WGK 1
• Flash Point(F): 30.2 °F - closed cup
• Flash Point(C): -1 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves