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Methyl acetate information


Not to be confused with Menthyl acetate.
Methyl acetate[1]
Skeletal formula of methyl acetate
Ball and stick model of the methyl acetate molecule
Names
Preferred IUPAC name
Methyl acetate
Systematic IUPAC name
Methyl ethanoate
Other names
Methyl ester of acetic acid
Identifiers
CAS Number
  • 79-20-9 checkY
3D model (JSmol)
  • Interactive image
ChEBI
  • CHEBI:77700 ☒N
ChEMBL
  • ChEMBL14079 checkY
ChemSpider
  • 6335 checkY
ECHA InfoCard 100.001.078 Edit this at Wikidata
KEGG
  • C17530 checkY
PubChem CID
  • 6584
UNII
  • W684QT396F checkY
CompTox Dashboard (EPA)
  • DTXSID4021767 Edit this at Wikidata
InChI
  • InChI=1S/C3H6O2/c1-3(4)5-2/h1-2H3 checkY
    Key: KXKVLQRXCPHEJC-UHFFFAOYSA-N checkY
  • InChI=1/C3H6O2/c1-3(4)5-2/h1-2H3
    Key: KXKVLQRXCPHEJC-UHFFFAOYAV
SMILES
  • O=C(OC)C
Properties
Chemical formula
 C3H6O2
Molar mass 74.079 g·mol−1
Appearance Colorless liquid
Odor Fragrant, fruity[2]
Density 0.932 g cm−3
Melting point −98 °C (−144 °F; 175 K)
Boiling point 56.9 °C (134.4 °F; 330.0 K)
Solubility in water
 ~25% (20 °C)
Vapor pressure 173 mmHg (20°C)[2]
Magnetic susceptibility (χ)
 -42.60·10−6 cm3/mol
Refractive index (nD)
 1.361
Hazards
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 −10 °C; 14 °F; 263 K[2]
Explosive limits 3.1%-16%[2]
Lethal dose or concentration (LD, LC):
LD50 (median dose)
 3700 mg/kg (oral, rabbit)[3]
LCLo (lowest published)
 11,039 ppm (mouse, 4 hr)
21,753 ppm (cat, 1 hr)
32,000 ppm (rat, 4 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 200 ppm (610 mg/m3)[2]
REL (Recommended)
 TWA 200 ppm (610 mg/m3) ST 250 ppm (760 mg/m3)[2]
IDLH (Immediate danger)
 3100 ppm[2]
Safety data sheet (SDS) External MSDS
Related compounds
Related esters
 Methyl formate
Ethyl acetate
Ethyl formate
Methyl fluoroacetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Infobox references

Methyl acetate, also known as MeOAc, acetic acid methyl ester or methyl ethanoate, is a carboxylate ester with the formula CH3COOCH3. It is a flammable liquid with a characteristically pleasant smell reminiscent of some glues and nail polish removers. Methyl acetate is occasionally used as a solvent, being weakly polar and lipophilic, but its close relative ethyl acetate is a more common solvent being less toxic and less soluble in water. Methyl acetate has a solubility of 25% in water at room temperature. At elevated temperature its solubility in water is much higher. Methyl acetate is not stable in the presence of strong aqueous bases or aqueous acids. Methyl acetate is not considered a VOC in the USA.[4][5]

  1. ^ Merck Index, 12th Edition, 6089.
  2. ^ a b c d e f g NIOSH Pocket Guide to Chemical Hazards. "#0391". National Institute for Occupational Safety and Health (NIOSH).
  3. ^ a b "Methyl acetate". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  4. ^ Zeno, W. Wicks, JR, Frank N. Jones, S. Peter Pappas, and Douglas A. Wicks (2007). Organic Coatings. Hoboken, New Jersey: Wiley. ISBN 978-0-471-69806-7.{{cite book}}: CS1 maint: multiple names: authors list (link)
  5. ^ "Update: U.S. EPA Exempt Volatile Organic Compounds". American Coatings Association. 2018-01-30. Retrieved 2019-03-20.

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