3-Chloro-2-butanone
Synonym(s):Chloro-MEK
- CAS NO.：4091-39-8
- Empirical Formula: C4H7ClO
- Molecular Weight: 106.55
- MDL number: MFCD00000865
- EINECS: 223-834-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:21:44
What is 3-Chloro-2-butanone?
Chemical properties
CLEAR YELLOW TO BROWNISH LIQUID
The Uses of 3-Chloro-2-butanone
3-Chloro-2-butanone was used in production of chiral alcohols from acetophenone derivatives, β-ketoesters and N-Boc-3-pyrrolidinone by recombinant E. coli cells. It was used in the synthesis of carbene precursor, 3-aryl-4,5-dimethylthiazolium chloride.
The Uses of 3-Chloro-2-butanone
3-Chloro-2-butanone was used to study various carbonylic compounds as substrates for 4-hydroxyacetophenone monooxygenase from Pseudomonas fluorescens ACB.
Synthesis Reference(s)
Journal of the American Chemical Society, 77, p. 5274, 1955 DOI: 10.1021/ja01625a016
General Description
3-Chloro-2-butanone reacts with 1,4-dianion of acetophenone N-ethoxycarbonylhydrazone to yield pyrazoline derivatives.
Properties of 3-Chloro-2-butanone
| Melting point: | <-60°C |
| Boiling point: | 114-117 °C (lit.) |
| Density | 1.055 g/mL at 25 °C (lit.) |
| refractive index | n |
| Flash point: | 70 °F |
| storage temp. | Flammables area |
| solubility | 30g/l |
| form | clear liquid |
| Specific Gravity | 1.058 (20/4℃) |
| color | Light orange to Yellow to Green |
| PH | 2.4 (25g/l, H2O, 20℃) |
| explosive limit | 2.3%(V) |
| Water Solubility | 3 g/100 mL |
| BRN | 385637 |
| CAS DataBase Reference | 4091-39-8(CAS DataBase Reference) |
| NIST Chemistry Reference | 2-Butanone, 3-chloro-(4091-39-8) |
| EPA Substance Registry System | 2-Butanone, 3-chloro- (4091-39-8) |
Safety information for 3-Chloro-2-butanone
| Signal word | Warning |
| Pictogram(s) |
 Flame Flammables GHS02  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H226:Flammable liquids H302:Acute toxicity,oral |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. |
Computed Descriptors for 3-Chloro-2-butanone
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