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A5373512

Methyl acetate , Analysis of standard products, 99.9%(GC) , 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

Update time: 2022-07-08

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  n20/D 1.361(lit.)
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.
Odor Threshold 1.7ppm
explosive limit 3.1-16%(V)
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℃

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
RIDADR  UN 1231 3/PG 2
OEB A
OEL TWA: 200 ppm (610 mg/m3), STEL: 250 ppm (760 mg/m3)
WGK Germany  1
RTECS  AI9100000
Autoignition Temperature 936 °F
TSCA  Yes
HS Code  2915 39 00
HazardClass  3
PackingGroup  II
Toxicity LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rat > 2000 mg/kg
IDLA 3,100 ppm [10% LEL]

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