methylethanoate
Methyl acetate
CAS: 79-20-9
Molecular Formula: C3H6O2
methylethanoate - Names and Identifiers
| Name | Methyl acetate |
| Synonyms | Metile Methyl acetate methylethanoate methyle(acetatede) Acetate de methyle Acetic acid methyl ester methylesterkiselinyoctove methyle(acetatede)(french) Methylester kiseliny octove methylesterkiselinyoctove(czech) |
| CAS | 79-20-9 |
| EINECS | 201-185-2 |
| InChI | InChI=1/C3H6O2/c1-3(4)5-2/h1-2H3 |
methylethanoate - Physico-chemical Properties
| Molecular Formula | C3H6O2 |
| Molar Mass | 74.08 |
| Density | 0.934 g/mL at 25 °C |
| Melting Point | -98 °C (lit.) |
| Boling Point | 57-58 °C (lit.) |
| Flash Point | 3.2°F |
| JECFA Number | 125 |
| Water Solubility | 250 g/L (20 ºC) |
| Solubility | 250g/l |
| Vapor Presure | 165 mm Hg ( 20 °C) |
| Vapor Density | 2.55 (vs air) |
| Appearance | Solution |
| Color | Clear colorless to slightly pale yellow |
| Odor | Slightly acrid, sweet; fragrant. |
| Exposure Limit | TLV-TWA 200 ppm (～610 mg/m3) (ACGIH,MSHA, and OSHA); TLV-STEL 250 ppm(～760 mg/m3) (ACGIH); IDLH 10,000 ppm(NIOSH). |
| Maximum wavelength(λmax) | ['λ: 255 nm Amax: 1.0', , 'λ: 275 nm Amax: 0.1', , 'λ: 300 nm Amax: 0.01'] |
| Merck | 14,6008 |
| BRN | 1736662 |
| Storage Condition | no restrictions. |
| 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 |
| Explosive Limit | 3.1-16%(V) |
| Refractive Index | n20/D 1.361(lit.) |
| Physical and Chemical Properties | Characteristics of colorless liquid, with aromatic flavor. melting point -98.1 ℃ boiling point 57 ℃ relative density 0.4330 refractive index 1.3594 flash point -10 ℃ solubility, the ethers are miscible, and the solubility in water is 31.9g/100ml(20 °c). |
| Use | Used as organic solvents, paint artificial leather and spices and other raw materials |
methylethanoate - Risk and Safety
| Risk Codes | R11 - Highly Flammable R36 - Irritating to the eyes R66 - Repeated exposure may cause skin dryness or cracking R67 - Vapors may cause drowsiness and dizziness |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S29 - Do not empty into drains. S33 - Take precautionary measures against static discharges. |
| UN IDs | UN 1231 3/PG 2 |
| WGK Germany | 1 |
| RTECS | AI9100000 |
| TSCA | Yes |
| HS Code | 2915 39 00 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orally in Rabbit: > 5000 mg/kg LD50 dermal Rat > 2000 mg/kg |
methylethanoate - Upstream Downstream Industry
| Raw Materials | Acetic acid Methyl alcohol |
methylethanoate - Nature
Open Data Verified Data
colorless liquid with aromatic flavor. The relative density was 0.93. Melting point 98.1 °c. Boiling point of 57 degrees Celsius. Flash point -10 °c. Refractive index 3594. Heat of vaporization: 410 J/g. Specific heat capacity 2.1 J/(g. C). Vapor pressure (20 °c) 22. 64kPa. It is miscible with alcohol and ether, and its solubility in water is 31.9g/lOOmL (20 ° C.). Easy hydrolysis. Flammable.
Last Update：2024-01-02 23:10:35
methylethanoate - Preparation Method
Open Data Verified Data
acetic acid and methanol were directly esterified with sulfuric acid as catalyst to produce crude methyl acetate. Then calcium chloride dehydration, Sodium Carbonate neutralization, fractionation to the finished product.
Last Update：2022-01-01 10:32:41
methylethanoate - Preparation Method
Open Data Verified Data
A fast-drying solvent for nitrocellulose and cellulose acetate, used in paint coatings. It is also used in the manufacture of artificial leather and spices and as an extractant for oils and fats. It is also a raw material for the manufacture of dyes and drugs.
Last Update：2022-01-01 10:32:41
methylethanoate - Safety
Open Data Verified Data
- methyl acetate has a strong irritating effect on the eyes and upper respiratory tract, and is narcotic at high concentrations. Rat oral LD50 2900mg/kg. The maximum allowable concentration in the workplace is 610mg/m3.
- the workplace should be well ventilated, and the operators should wear masks, gloves, protective clothing and other necessary equipment.
- iron drum packaging or bottled. Storage should pay attention to fire prevention, to prevent direct sunlight. According to the "flammable dangerous goods" storage and transportation.
Last Update：2022-01-01 10:32:42
methylethanoate - Reference Information
| FEMA | 2676 | METHYL ACETATE |
| relative polarity | 0.253 |
| olfactory Threshold | 1.7ppm |
| Henry's Law Constant | 0.90 at 20.00 °C, 1.56 at 30.00 °C (headspace-GC, Hovorka et al., 2002) |
| LogP | 0.18 at 20℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| content analysis | determined by gas chromatography (GT-10-4) non-polar column method. |
| toxicity | According to relevant data, acute toxicity data of methyl acetate: oral LD50>5g/kg (rats), ld502900 mg/kg (mouse, oral), skin test LD50>5g/kg (rabbit). It is safe for use in food as a flavor (FDA,§ 172.515,2000). FEMA is recognized as GRAS,FEMA No. 2676, and is approved for consumption by the FDA. The European Council also lists methyl acetate in the table of artificial flavors that can be added to foods and are not harmful to human health, the ADI value was defined as 1 mg/kg. |
| usage limit | FEMA(mg/kg): soft drinks 28; Cold drinks 29; Candy 11; Baked goods 14; gelatin and pudding 0.10; Alcoholic beverages 0.20. |
| Use | used as an organic solvent, paint artificial leather and spices and other raw materials GB 2760-1996 for the permitted use of edible spices. quick-drying solvent of nitrocellulose and cellulose acetate for paint and coating. It is also used in the manufacture of artificial leather and spices and as an extractant for oils and fats. It is also a raw material for the manufacture of dyes and drugs. used as a standard substance and solvent for chromatographic analysis, and also used in the separation of lithium chloride from alkali metal chlorides and the synthesis of perfumes organic solvents (nitrocellulose, oils, resins and paints). Separation of lithium chloride from alkali metal chlorides. Fragrance synthesis. Artificial leather. |
| production method | methyl acetate crude product is produced by direct esterification reaction of acetic acid and methanol in the presence of sulfuric acid, and then dehydrated with calcium chloride, neutralization with sodium carbonate and fractionation gave the final product. |
| spontaneous combustion temperature | 936 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentrations | 3,100 ppm [10% LEL] |
Last Update：2024-04-09 02:00:11
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Raw Materials for methylethanoate