Dimethylsebaca
DMS
CAS: 106-79-6
Molecular Formula: C12H22O4
Dimethylsebaca - Names and Identifiers
| Name | DMS |
| Synonyms | DMS Dimethylsebaca METHYL SEBACATE DIMETHYL SEBACATE DIMETHYL DECANEDIOATE SEBACIC ACID DIMETHYL ESTER decadioic acid, dimethyl ester DECANEDIOIC ACID DIMETHYL ESTER Dimethyl octane-1,8-dicarboxylate 1,8-OCTANEDICARBOXYLIC ACID-BIS-METHYL ESTER |
| CAS | 106-79-6 |
| EINECS | 203-431-4 |
| InChI | InChI=1/C12H22O4/c1-15-11(13)9-7-5-3-4-6-8-10-12(14)16-2/h3-10H2,1-2H3 |
Dimethylsebaca - Physico-chemical Properties
| Molecular Formula | C12H22O4 |
| Molar Mass | 230.3 |
| Density | 0.988 g/mL at 25 °C (lit.) |
| Melting Point | 29-31 °C (lit.) |
| Boling Point | 158 °C/10 mmHg (lit.) |
| Flash Point | 293°F |
| Water Solubility | Insoluble in water. |
| Vapor Presure | 0.08Pa at 25℃ |
| Appearance | powder to lump to clear liquid |
| Color | White or Colorless to Light yellow |
| BRN | 1785523 |
| Storage Condition | Sealed in dry,Room Temperature |
| Stability | Stable. Incompatible with oxidizing agents, bases. Combustible. |
| Refractive Index | 1.4355 (estimate) |
| Physical and Chemical Properties | density 0.988 |
| Use | Can be used as cellulose resin, ethylene resin and synthetic rubber plasticizer, softening agent and solvent. It is widely used as the main raw material for producing light stabilizer UV-770,UV-750,UV-123, etc. It is used as a solvent and plasticizer for cellulose and vinyl resins, and can also be used as an intermediate in organic synthesis. |
Dimethylsebaca - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| TSCA | Yes |
| HS Code | 29171310 |
Dimethylsebaca - Reference Information
| LogP | 3.38 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Overview | high purity dimethyl sebacate is based on castor oil as the main raw material, at present, the main method for preparing dimethyl sebacate is to mix sebacic acid and methanol in a certain proportion. Under the action of catalyst, after sebacic acid is completely dissolved, esterification reaction is carried out, after the temperature drops to the solution to form the interface, the water phase is separated; Then sebacic acid and methanol are added to carry out the second step esterification reaction. In the above esterification reaction, generally used to the catalyst is concentrated sulfuric acid, the liquid as a catalyst, can not be recovered, not only the cost is higher, and the operator also has a certain risk at work. |
| Application | dimethyl sebacate with high purity is produced from castor oil as the main raw material through many complicated chemical and physical changes, high-tech products produced by steam vacuum distillation technology. It is mainly used in aviation, aerospace advanced cold-resistant plasticizers and advanced cold-resistant grease field; Can be used as cellulose resin, ethylene resin and synthetic rubber plasticizer, softener and solvent; it is widely used as the main raw material for the production of light stabilizers UV-770,UV-750,UV-123, etc.; It can also be used as an intermediate in organic synthesis. |
| preparation | the preparation method of dimethyl sebacate includes the following steps: esterification reaction:(1) prepare materials according to the following molar ratio: sebacic acid: methanol: Catalyst = 1:0.9:0.004;(2) take 30% of the total mass fraction of methanol in step 1 into the esterification kettle, close the alcohol release gate, then open the stirrer, input all the prepared sebacic acid in step 1, and add the solid catalyst sio2-al2o3; The amount of the solid catalyst is 0.15% of the mass fraction of Sebacic acid, close the tank lid, and open the recorder;(3) open the steam valve to heat up to the liquid temperature of about 70 deg C for 1H, the first esterification reaction, esterification time is 3~4H, after a esterification reaction, Continue to raise the temperature to 90 ℃ and start to evaporate alcohol;(4) when the temperature rises to 110~125 ℃, start to add alcohol continuously, the remaining amount of methanol in step 1 is added to the esterification kettle for secondary esterification reaction, the rate of adding alcohol is less than or equal to 300L/h, and the secondary esterification temperature is not more than 140 ℃; Distillation process:(1) when the liquid temperature dropped to 75 degrees Celsius, with a concentration of 2.0%, the temperature of 65 degrees of sodium carbonate solution and the reaction Ester solution pH 7.5;(2) start the pump to drain the crude ester of waste alkali solution into the rectification kettle, open the heat transfer oil valve to warm up, when the temperature of the rectification kettle rises above 150 ℃, the vacuum degree is 0.09Mpa, turn off the pump, open the sliding valve pump;(3) when the temperature of the distillation kettle rises above 160 ℃, the vacuum degree is 0.096Mpa, the reflux time is at least one hour, and then the finished product is collected. When the reflux is stopped, the finished product is collected, Close the heat conduction oil in and out of the valve, stop the valve pump, open the empty valve, and install the finished product. The product was colorless and transparent liquid, and was characterized by IR and 1h-nmr as dimethyl sebacate. |
| Application | dimethyl sebacate can be used as plasticizer, softener and solvent for cellulose resin, ethylene resin and synthetic rubber. It is widely used as the main raw material for producing light stabilizer UV-770,UV-750,UV-123, etc. It can be used as solvent and plasticizer of cellulose and vinyl resin, and can also be used as intermediate solvent of organic synthesis. Intermediates. Plasticizers. |
Last Update：2024-04-10 22:29:15
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