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79-20-9

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Identification

Name
Methyl acetate
CAS
79-20-9
Synonyms
ACETIC ACID METHYL ESTER
FEMA 2676
LABOTEST-BB LT00785639
METHYL ACETATE
RARECHEM AL BF 0544
Acetate de methyle
acetatedemethyle
acetatedemethyle(french)
CH3COOCH3
Devoton
ethanoicacid,methylester
Ethyl ester of monoacetic acid
ethylesterofmonoaceticacid
femanumber2676
Methyl acetic ester
Methyl ester of acetic acid
Methyl ethanoate
Methylacetaat
Methylacetat
methylaceticester
EINECS(EC#)
201-185-2
Molecular Formula
C3H6O2
MDL Number
MFCD00008711
Molecular Weight
74.08
MOL File
79-20-9.mol

Chemical Properties

Appearance
colourless liquid with a pleasant odour
Appearance
Methyl acetate is a colorless liquid with a fruity odor.
mp 
-98 °C
bp 
57-58 °C(lit.)

density 
0.932 g/mL at 25 °C(lit.)

vapor density 
2.55 (vs air)

vapor pressure 
165 mm Hg ( 20 °C)

refractive index 
n20/D 1.361(lit.)

FEMA 
2676
Fp 
3.2 °F

storage temp. 
Flammables area
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.
Water Solubility 
250 g/L (20 ºC)
Merck 
14,6008
BRN 
1736662
CAS DataBase Reference
79-20-9(CAS DataBase Reference)
NIST Chemistry Reference
Acetic acid, methyl ester(79-20-9)
EPA Substance Registry System
79-20-9(EPA Substance)

Safety Data

Hazard Codes 
F,Xi
Risk Statements 
R11:Highly Flammable.
R36:Irritating to the eyes.
R66:Repeated exposure may cause skin dryness or cracking.
R67:Vapors may cause drowsiness and dizziness.
Safety Statements 
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S29:Do not empty into drains .
S33:Take precautionary measures against static discharges .
RIDADR 
UN 1231 3/PG 2

WGK Germany 
1

RTECS 
AI9100000

HazardClass 
3
PackingGroup 
II
HS Code 
29153900
Safety Profile
Moderately toxic by several routes. A human systemic irritant by inhalation. A moderate skin and eye irritant. Mutation data reported. Dangerous fire hazard when exposed to heat, flame, or oxidizers. Moderate explosion hazard when exposed to heat or flame. When heated to decomposition it emits acrid smoke and fumes. See also ESTERS.
Hazardous Substances Data
79-20-9(Hazardous Substances Data)

Raw materials And Preparation Products

Hazard Information

General Description
A clear colorless liquid with a fragrant odor. Moderately toxic. Flash point 14°F. Vapors heavier than air.
Reactivity Profile
METHYL ACETATE(79-20-9) presents a fire or explosion hazard when exposed to strong oxidizing agents. Emits irritating fumes and acrid smoke when heated to decomposition, [Lewis, 3rd ed., 1993, p. 826]. METHYL ACETATE(79-20-9) reactivity is consistent with other compounds of the ester group.
Air & Water Reactions
Highly flammable. Water soluble.
Hazard
Flammable, dangerous fire and explosion risk, explosive limits in air 3–16%. Irritant to respiratory tract. Headache, dizziness, nausea, eye damage (degeneration of ganglion cells in the retina).
Health Hazard
(Very similar to those of methyl alcohol, which constitutes 20% of commercial grade.) Inhalation causes headache, fatigue, and drowsiness; high concentrations can produce central nervous system depression and optic nerve damage. Liquid irritates eyes and may cause defatting and cracking of skin. Ingestion causes headache, dizziness, drowsiness, fatigue; may cause severe eye damage.
Potential Exposure
Methyl acetate is used as a solvent in lacquers and paint removers; and as an intermediate in pharmaceutical manufacture.
Fire Hazard
Behavior in Fire: Vapor is heavier than air and may travel a considerable distance to a source of ignition and flash back.
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.
Shipping
UN1231 Methyl acetate, Hazard Class: 3; Labels: 3-Flammable liquid.
Incompatibilities
Vapor may form explosive mixture with air. A Strong reducing agent. Incompatible water, acids, nitrates, strong oxidizers; alkalis. Attacks some plastics. Attacks many metals in presence of water. Reacts slowly with water, forming acetic acid and methanol. Decomposes in heat; on contact with air, bases, strong oxidizers; UV-light; possible fire and explosion hazard
Waste Disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.

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