Methyl acetateCAS#79-20-9

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

Fp 

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.

PH

7

biological source

synthetic

Odor Type

ethereal

Odor Threshold

1.7ppm

explosive limit

3.1-16%(V)

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.

Cosmetics Ingredients Functions

PERFUMING
SOLVENT

LogP

0.18 at 20℃

Surface tension

25.4mN/m at 298.15K

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)

Safety Information

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

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]