methyl prop-2-enoate
Poly(vinyl acetate)
CAS: 9003-20-7
Molecular Formula: C4H6O2
methyl prop-2-enoate - Names and Identifiers
methyl prop-2-enoate - Physico-chemical Properties
| Molecular Formula | C4H6O2 |
| Molar Mass | 86.08924 |
| Density | 1.18 g/mL at 25 °C |
| Melting Point | 60°C |
| Boling Point | 70-150 °C |
| Flash Point | >100℃ |
| Solubility | ketones, ethers and aromatic hydrocarbons: soluble |
| Vapor Presure | 86.3mmHg at 25°C |
| Appearance | pellets |
| Color | Clear |
| PH | 3.0-5.5 |
| Storage Condition | 2-8°C |
| Stability | Stable. Incompatible with strong oxidizing agents, strong bases. Combustible. |
| Refractive Index | n20/D 1.467 |
| Physical and Chemical Properties | Colorless viscous liquid or pale yellow transparent glass particles, odorless, tasteless, tough and plastic. The relative density d420 is 1.191, the refractive index is 1.45~1.47, and the softening point is about 38 ℃. Can not be miscible with fat and water, can be miscible with ethanol, acetic acid, acetone, ethyl acetate. It is stable to light and heat, and acetic acid will be decomposed when heated above 250 ℃. There was no acute poisoning in mice after oral administration of 10g/kg, Adl 0~20mg/kg (Shanghai). |
| Use | Used as polyvinyl alcohol, vinyl acetate-Vinyl Chloride Copolymer, vinyl acetate-ethylene copolymer raw materials, coatings, adhesives, bubble gum, etc |
methyl prop-2-enoate - Risk and Safety
| Risk Codes | R45 - May cause cancer R46 - May cause heritable genetic damage |
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| RTECS | AK0920000 |
| TSCA | Yes |
| HS Code | 39051900 |
| Toxicity | LD50 oral in mouse: > 25gm/kg |
methyl prop-2-enoate - Nature
Open Data Verified Data
colorless viscous liquid or transparent glass-like particles, odorless, tasteless, toughness and plasticity. Not with fat and water miscible, miscible with acetic acid, acetone, ethanol, ethyl acetate. Stable to light and heat, heating to more than 250 ° C will decompose into acetic acid. There was no acute poisoning in mice by 10 g/kg.
Last Update：2024-01-02 23:10:35
methyl prop-2-enoate - Preparation Method
Open Data Verified Data
In the presence of acetic acid, benzoyl peroxide as initiator, bulk polymerization from vinyl acetate; Or polyvinyl alcohol as dispersant, polymerization in a solvent at a certain temperature.
Last Update：2022-01-01 10:08:54
methyl prop-2-enoate - Use
Open Data Verified Data
used as gum base material, China's provisions can be used for emulsified flavor and gum sugar, the maximum use of 60g/g.
Last Update：2022-01-01 10:08:54
methyl prop-2-enoate - Reference Information
| (IARC) carcinogen classification | 3 (Vol. 19, Sup 7) 1987 |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| preparation method | 1. Acetic acid and acetylene addition preparation method (condition: zinc acetate as catalyst, 170-250 ℃) CHCH CH3COOH -->CH3COOCH = CH2 2. Direct oxidation of ethylene with acetic acid and oxygen (condition: palladium chloride, copper chloride as catalyst, heated and pressurized) 2C2H4 2CH3COOH O2 -->2CH3COOCH = CH2 2H2O |
| toxicity | as a chewing gum, does not enter the human body, non-toxic. And because it is a polymer substance insoluble in water and oil, it cannot be absorbed by the human body. A caseous change in the liver and cardiac muscle cells was reported in rats after oral administration of 500mg/kg for 30 days. Safe for use in food (FDA,§ 172.615,2000). |
| usage limit | GB 2760-96: Gum, emulsified flavor 60g/kg. GMP is a limitation (FDA,§ 181.30,2000). |
| Use | for gum base material, China's provisions can be used for emulsified flavor and gum, the maximum use of 60g/kg. used in the manufacture of toy cashmere and non-woven fabrics used as raw materials for polyvinyl alcohol, vinyl acetate-Vinyl Chloride Copolymer, vinyl acetate-ethylene copolymer, and also used in the preparation of coatings, adhesives, etc. Mainly used as coatings, adhesive, paper, chewing gum base and fabric finishing agent, can also be used as polyvinyl alcohol and Polyvinyl Acetal raw materials The basic gum base of gum sugar; Fruit film agent, can prevent water evaporation, play a role in preservation. The thermoplastic resin is a main raw material for preparing polyvinyl alcohol by hydrolysis into polyvinyl alcohol in an acid or alkaline solvent. When the photosensitizer is contained in the molecule, it is sensitive to light, and the decomposition reaction occurs under the action of ultraviolet light or electron beam, which has the characteristics of positive photosensitive resin. Polyvinyl acetate can be dissolved in a variety of organic solvents, can be copolymerized with a variety of monomers with double bonds, so as to introduce a variety of functional groups, with different properties. Often used as a binder. used as polyvinyl alcohol, vinyl acetate-Vinyl Chloride Copolymer, vinyl acetate-ethylene copolymer of raw materials, coatings, adhesives, bubble gum, etc. |
| production method | It is formed by polymerization of vinyl acetate in the presence of acetic acid, and the polymerization degree is preferably 250~600, traces of catalyst (usually peroxide), monomer and/or solvent remaining in the resin are removed by vacuum drying, steam stripping, washing or a combined treatment. In the presence of acetic acid, with benzoyl peroxide as initiator, vinyl acetate bulk polymerization; Or with polyvinyl alcohol as dispersant, solution polymerization is carried out in a solvent at 70-90 °c for 2-6h (the degree of polymerization is preferably controlled at 250-600) to obtain the product. |
| category | toxic substances |
| toxicity grade | low toxicity |
| Acute toxicity | oral-rat LD:> 25000 mg/kg; Oral-mouse LD:> 25000 mg/kg |
| flammability hazard characteristics | flammability; Thermal decomposition releases irritating smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand and water |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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