2-Propenoic Acid Methyl Ester
methylacrylate
CAS: 96-33-3
Molecular Formula: C4H6O2
2-Propenoic Acid Methyl Ester - Names and Identifiers
2-Propenoic Acid Methyl Ester - Physico-chemical Properties
| Molecular Formula | C4H6O2 |
| Molar Mass | 86.09 |
| Density | 0.956 g/mL at 25 °C (lit.) |
| Melting Point | -75 °C (lit.) |
| Boling Point | 80 °C (lit.) |
| Flash Point | 26.6°F |
| Water Solubility | 60 g/L (20 ºC) |
| Solubility | 60g/l |
| Vapor Presure | 67.5 mm Hg ( 20 °C) |
| Vapor Density | 3 (vs air) |
| Appearance | Liquid |
| Color | Clear |
| Exposure Limit | TLV-TWA 10 ppm (～35 mg/m3) (ACGIHand MSHA), TLV-TWA skin 10 ppm(～35 mg/m3) (OSHA); IDLH 1000 ppm(NIOSH). |
| Merck | 14,6011 |
| BRN | 605396 |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with bases, acids, oxidizing agents, peroxides. May polymerize on exposure to light. Highly flammable. Commercial product may be inhibited by the presence of hydroquinone monometh |
| Sensitive | Light Sensitive |
| Explosive Limit | 2.8%(V) |
| Refractive Index | n20/D 1.402(lit.) |
| Physical and Chemical Properties | Colorless volatile liquid. With a spicy smell, a tear-inducing effect. melting point -75 ℃ boiling point 80.5 ℃ relative density 0.9535 refractive index 1.4021 flash point -3 ℃ solubility, acetone and benzene, slightly soluble in water. |
| Use | Is a synthetic polymer monomer, mainly used as acrylic second monomer, and styrene, vinyl acetate and other copolymers are widely used in coatings, adhesives and other industries |
2-Propenoic Acid Methyl Ester - Risk and Safety
| Risk Codes | R11 - Highly Flammable R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. R43 - May cause sensitization by skin contact |
| Safety Description | S9 - Keep container in a well-ventilated place. S25 - Avoid contact with eyes. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S33 - Take precautionary measures against static discharges. S36/37 - Wear suitable protective clothing and gloves. S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S43A - |
| UN IDs | UN 1919 3/PG 2 |
| WGK Germany | 2 |
| RTECS | AT2800000 |
| FLUKA BRAND F CODES | 8 |
| TSCA | Yes |
| HS Code | 2916 12 00 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in rats: 0.3 g/kg (Smyth, Carpenter) |
2-Propenoic Acid Methyl Ester - Nature
Open Data Verified Data
colorless volatile liquid. With a spicy smell, a tear-inducing effect. Relative density 0.9535. Melting Point -75 °c. Boiling point 80.5 °c. Flash point -3 °c. Refractive index 4021. Vapor pressure (20 C) 9.09kPa. Heat of vaporization: 0.39kj/g. Specific heat capacity 2. Oj/(g. °C). Soluble in ethanol, ether, acetone and benzene, water-soluble. The solubility in water was 6g/lOOmL(20 °c). Easy to polymerize.
Last Update：2024-01-02 23:10:35
2-Propenoic Acid Methyl Ester - Preparation Method
Open Data Verified Data
- acrylonitrile hydrolysis method with acrylonitrile as raw material, under the action of sulfuric acid hydrolysis to produce acrylamide sulfate, and then with methanol esterification of crude methyl acrylate. After salting out, fractionation to obtain the finished product.
- propylene oxidation method propylene is used as a raw material, which is first oxidized to produce acrolein, and then oxidized to produce acrylic acid. Esterification of acrylic acid and methanol with sulfuric acid or ion exchange resin as catalyst to produce methyl acrylate. The esterification product is dehydrated and fractionated to obtain a finished product.
- ketene method ketene and formaldehyde are condensed with boron trifluoride as a catalyst, and then quenched with methanol to produce methyl acrylate by esterification.
Last Update：2022-01-01 10:32:49
2-Propenoic Acid Methyl Ester - Use
Open Data Verified Data
organic synthesis intermediates, is also a monomer for the synthesis of high molecular polymers. The rubber copolymerized with methyl acrylate has good resistance to high temperature and oil. Copolymerization with acrylonitrile can improve its spinnability, thermoplasticity and dyeing properties. With methyl methacrylate vinyl acetate or styrene copolymerization, can produce good performance of coatings and floor polish. It is also widely used in pharmaceutical manufacturing, leather processing, paper making and adhesive manufacturing.
Last Update：2022-01-01 10:32:49
2-Propenoic Acid Methyl Ester - Safety
Open Data Verified Data
- methyl acrylate has moderate toxicity, strong irritation and corrosion to eyes, skin and mucosa, and can be absorbed through the skin to cause poisoning. The oral LD50 of rats is 300mg/kg. Rabbit oral LD50 280mg/kg. The symptoms of chronic poisoning were Head Pain, lethargy, spasm of hands and feet, etc. The maximum allowable concentration in the workplace is 35mg/m3. Ventilation should be enhanced at the operating site. Operators should wear protective equipment such as rubber gloves, face masks and protective clothing. Poisoning should be moved to a well-ventilated place static rest, taking glucose and vitamin B, C, etc.
- galvanized iron drum packaging. Should be stored separately to prevent direct sunlight, storage temperature <21 ℃, long-term storage and transport should be added inhibitor. Pay attention to fire prevention. According to the provisions of flammable storage and transportation.
Last Update：2022-01-01 10:32:50
2-Propenoic Acid Methyl Ester - Reference Information
| olfactory Threshold | 0.0035ppm |
| Henry's Law Constant | (x 10-4 atm?m3/mol):1.3 at 20 °C (approximate - calculated from water solubility and vapor pressure) |
| LogP | 0.739 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| (IARC) carcinogen classification | 2B (Vol. 39, Sup 7, 71, 122) 2019 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Application | is a monomer of synthetic polymer, mainly used as the second monomer of acrylic fiber, and styrene, vinyl acetate copolymers are widely used in coatings, adhesives and other industries mainly used in polyester/cotton, polyester/nitrile and other blended fabrics warp sizing methyl acrylate is an organic synthesis intermediate and a monomer for the synthesis of high polymers. The copolymer rubber synthesized from methyl acrylate has good high temperature and oil resistance. Copolymerization with acrylonitrile can change the spinnability, plastic resistance and dyeing properties of polyacrylonitrile fibers. With methyl methacrylate, vinyl acetate or styrene copolymer is a good performance of coatings and floor polish. In addition, in the pharmaceutical manufacturing, leather processing, paper, adhesive manufacturing, paint and other industries also have its increasingly widespread use. used in resin synthesis, preparation of plastic coatings and leather, textiles and paper processing, also used as adhesives to produce polymers. Intermediates. Activator. Synthetic resin. 1. Polymeric monomer. 2. Organic synthesis. For the production of coatings, textiles, leather, adhesives and other industrial resins. |
| production method | the production methods of propylene methyl ester include: acrylonitrile hydrolysis method, propylene direct oxidation method and ketene method. 1. Acrylonitrile hydrolysis method using acrylonitrile as raw material, hydrolysis is carried out in the presence of concentrated sulfuric acid, and the hydrolyzed acrylamide sulfate is reacted with methanol to obtain methyl acrylate. The methyl acrylate produced by hydration of acrylonitrile consumes 98% of acrylonitrile, 95% of methanol and 93% of sulfuric acid per ton. Propylene direct oxidation of propylene as raw material, the first step of oxidation of acrolein, and then oxidized to acrylic acid. The acrylic acid is then reacted with methanol to form methyl acrylate. The production of methyl acrylate by direct oxidation of propylene consumes 95% of propylene per ton of product. Ketene method ketene and formaldehyde were condensed with boron trifluoride as catalyst, then quenched with methanol and esterified to methyl acrylate. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 277 mg/kg; Oral-mouse LD50: 827 mg/kg |
| stimulation data | eyes -100 mg severe in rabbits; skin-rabbit 10 mg/24 h |
| explosive hazard characteristics | explosive when mixed with air |
| flammability hazard characteristics | in case of open flame, high temperature, flammable oxidant; Combustion stimulus smoke |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| extinguishing agent | dry powder, dry sand, carbon dioxide, foam, 1211 extinguishing agent |
| Occupational Standard | TWA 35 mg/m3 |
| spontaneous combustion temperature | 874 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentration | 250 ppm |
Last Update：2024-04-09 21:01:54
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