Methyl acetate manufacturers and suppliers

Methyl acetate suppliers

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.

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)

Safety Information

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]

Use

Methanol in methyl acetate can be detected by measuring its solubility in water. At 20o, the solubility of methyl acetate in water is ca 35g per 100mL, but 1% MeOH confers complete miscibility. Methanol can be removed by conversion to methyl acetate, by refluxing for 6hours with acetic anhydride (85mL/L), followed by fractional distillation. Acidic impurities can be removed by shaking with anhydrous K2CO3 and distilling. An alternative treatment is with acetyl chloride, followed by washing with concentrated NaCl and drying with CaO or MgSO4. (Solid CaCl2 cannot be used because it forms a crystalline addition compound.) Distillation from copper stearate destroys peroxides. Free alcohol or acid can be eliminated from methyl acetate by shaking with strong aqueous Na2CO3 or K2CO3 (three times), then with aqueous 50% CaCl2 (three times), saturated aqueous NaCl (twice), drying with K2CO3 and distilling it from P2O5. [Beilstein 2 IV 122.]

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