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Methyl acetate Structure

Methyl acetate

Chemical 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℃
Substances Added to Food (formerly EAFUS) METHYL ACETATE
FDA 21 CFR 172.515; 175.105
CAS DataBase Reference 79-20-9(CAS DataBase Reference)
EWG's Food Scores 2
FDA UNII W684QT396F
NIST Chemistry Reference Acetic acid, methyl ester(79-20-9)
EPA Substance Registry System Methyl acetate (79-20-9)

Safety

Symbol(GHS)
Signal wordDanger
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
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]
NFPA 704:
3
2 0

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