Methyl acetate , AR,98% , 79-20-9
Synonym(s):
Methyl acetate;Methyl ethanoate
CAS NO.：79-20-9
Empirical Formula: C3H6O2
Molecular Weight: 74.08
MDL number: MFCD00008711
EINECS: 201-185-2
PRODUCT Properties
| Melting point: | -98 °C (lit.) |
| Boiling point: | 57-58 °C (lit.) |
| Density | 0.934 g/mL at 25 °C |
| vapor density | 2.55 (vs air) |
| vapor pressure | 165 mm Hg ( 20 °C) |
| refractive index | n |
| FEMA | 2676 | METHYL ACETATE |
| Flash point: | 3.2 °F |
| storage temp. | no restrictions. |
| solubility | 250g/l |
| form | Solution |
| color | Clear colorless to slightly pale yellow |
| Relative polarity | 0.253 |
| Odor | Slightly acrid, sweet; fragrant. |
| explosive limit | 3.1-16%(V) |
| Odor Threshold | 1.7ppm |
| Odor Type | ethereal |
| Water Solubility | 250 g/L (20 ºC) |
| λmax | λ: 255 nm Amax: 1.0 λ: 275 nm Amax: 0.1 λ: 300 nm Amax: 0.01 |
| JECFA Number | 125 |
| Merck | 14,6008 |
| BRN | 1736662 |
| Henry's Law Constant | 0.90 at 20.00 °C, 1.56 at 30.00 °C (headspace-GC, Hovorka et al., 2002) |
| Exposure limits | TLV-TWA 200 ppm (～610 mg/m3) (ACGIH,
MSHA, and OSHA); TLV-STEL 250 ppm
(～760 mg/m3) (ACGIH); IDLH 10,000 ppm
(NIOSH). |
| Dielectric constant | 7.3（20℃） |
| Stability: | Stable. Extremely flammable - readily forms explosive mixtures with air. Note low flash point and wide explosion limits. Incompatible with strong oxidizing agents, strong bases, strong acids, nitrates. May be moisture sensitive. |
| LogP | 0.18 at 20℃ |
| CAS DataBase Reference | 79-20-9(CAS DataBase Reference) |
| NIST Chemistry Reference | Acetic acid, methyl ester(79-20-9) |
| EPA Substance Registry System | Methyl acetate (79-20-9) |
Description and Uses
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 VOC exempt.
Methyl acetate is used as a solvent forlacquers, resins, oils, and nitrocellulose; inpaint removers; as a flavoring agent; and inthe manufacture of artificial leather.
Safety
| Symbol(GHS) |   GHS02,GHS07 |
| Signal word | Danger |
| Hazard statements | H225-H319-H336 |
| Precautionary statements | P210-P233-P240-P241-P242-P305+P351+P338 |
| Hazard Codes | F,Xi |
| Risk Statements | 11-36-66-67 |
| Safety Statements | 16-26-29-33 |
| OEB | A |
| OEL | TWA: 200 ppm (610 mg/m3), STEL: 250 ppm (760 mg/m3) |
| RIDADR | UN 1231 3/PG 2 |
| WGK Germany | 1 |
| RTECS | AI9100000 |
| Autoignition Temperature | 936 °F |
| TSCA | Yes |
| HS Code | 2915 39 00 |
| HazardClass | 3 |
| PackingGroup | II |
| Hazardous Substances Data | 79-20-9(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rat > 2000 mg/kg |
| IDLA | 3,100 ppm [10% LEL] |
