Methyl acrylate

  • 2-Propenoic acid, methyl ester
  • Acrylic acid, methyl ester
  • Methyl-2-propenoate
  • Methyl propenoate
Formula
CH2=CHCOOCH3
Structure
Description
Clear, colorless liquid with a pungent, acrid odor. Lachrymator.
Uses
Production of acrylic & modacrylic fibers, used as a comonomer with acrylonitrile in such fibers.

Registry Numbers and Inventories.
CAS
96-33-3
EC (EINECS/ELINCS)
202-500-6
EC Index Number
607-034-00-0
EC Class
Highly flammable; Harmful; Irritant; Sensitising
R 11 20/21/22 36/37/38 43
S 9 25 26 33 36/37 43
RTECS
AT2800000
RTECS class
Tumorigen; Mutagen; Human Data; Primary Irritant
UN (DOT)
1919
Merck
12,6092
Beilstein/Gmelin
605396
Beilstein Reference
4-02-00-01457
Swiss Giftliste 1
G-1051
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C4H6O2
Formula mass
86.09
Melting point, °C
-74
Boiling point, °C
80.5
Vapor pressure, mmHg
87 (25 C)
Vapor density (air=1)
2.9
Saturation Concentration
11.3% at 25 C
Evaporization number
3.5 (butyl acetate = 1)
Odor Threshold Odor threshold 0.017 mg/m3
Critical temperature
263
Critical pressure
4.3
Density
0.9739 g/cm3 (0 C)
Solubility in water
Insoluble
Viscosity
0.482 cp @ 20C
Surface tension
24.2 g/s2
Refractive index
1.3959 (20 C)
Dipole moment
1.77 D
Dielectric constant
7.04 (25 C)
Partition coefficient, pKow
0.80
Heat of vaporization
34.54 kJ/mol
Heat of combustion
-2102 kJ.mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Refrigerator/flammables. Do not store under inert atmosphere. Separate from oxidizing materials. Inhibitor level should be checked periodically.
B2 D1A D2B E F
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to disperse vapors and dilute standing pools of liquid.
Disposal code
1
Stability
Stable only if stored and handled under recommended conditions. The stability of the product depends upon the availability of both dissolved oxygen and MEHQ inhibitor(CAS=150-76-5). The presence of oxygen is necessary for the MEHQ to function effectively. The product should never be stored under an inert gas atmosphere, but should always be stored under an atmosphere containing 5-21% oxygen by volume.
Incompatibilities
Strong oxidizing agents, strong acids, peroxides, strong alkalies.
Decomposition
When heated to decompisition it emits acrid smoke and irritating fumes.

Fire.
Flash Point,°C
-3
Autoignition, °C
415
Upper exp. limit, %
25.0
Lower exp. limit, %
2.8
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may spread fire. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide.
Fire potential
Flammable liquid and vapor.
Hazards
Liquid floats on water and may travel to a source of ignition and spread fire. Methyl acrylate, inhibited vapor is heavier than air and may travel a considerable distance to source of ignition and flash back.
Combustion products
Irritating vapors are generated in fires.
Health
3
 
Flammability
3
 
 
Reactivity
2
 

Health.
Exposure limit(s)
OSHA PEL: TWA 10 ppm (35 mg/m3) skin NIOSH REL: TWA 10 ppm (35 mg/m3) skin NIOSH IDLH: 250 ppm
Poison_Class
3
Exposure effects
Paresthesia have been reported. Headache, irritability, drowsiness and dizziness may occur. There is no evidence of methyl methacrylate-induced teratogenicity in humans but there are conflicting reports in animals.
   Ingestion
Harmful if swallowed. Causes gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation. Inhalation of methyl acrylate vapor or mist may cause headache, nausea, vomiting, confusion, dizziness, and unconsciousness. High exposure can cause pulmonary edema (accumulation of fluid in the lungs).
   Skin
May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. Exposure may cause irritation and possible burns. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation. May result in corneal injury. Lachrymator (substance which increases the flow of tears).

First aid
 
   Ingestion
DO NOT INDUCE VOMITING. Volatile chemicals have a high risk of being aspirated into the victim's lungs during vomiting which increases the medical problems. If the victim is conscious and not convulsing, give 1 or 2 glasses of water to dilute the chemical and IMMEDIATELY call a hospital or poison control center. IMMEDIATELY transport the victim to a hospital.
   Inhalation
IMMEDIATELY leave the contaminated area; take deep breaths of fresh air. If symptoms (such as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a physician and be prepared to transport the victim to a hospital. Provide proper respiratory protection to rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus (SCBA) should be used.
   Skin
IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or irritation develop, IMMEDIATELY call a physician and be prepared to transport the victim to a hospital for treatment.
   Eyes
First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Transport.
UN number
1919
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
MAM
 
HS Code
2916 12 10
 
Std. Transport #
4907245
 
IMO Chemical Code
17
IMO Pollution Category
B
IMO Hazard code
S/P