Bis(2-ethylhexyl) terephthalate
Bis(2-ethylhexyl) terephthalate
CAS: 6422-86-2
Molecular Formula: C24H38O4
Bis(2-ethylhexyl) terephthalate - Names and Identifiers
| Name | Bis(2-ethylhexyl) terephthalate |
| Synonyms | 168 plasticizer 168-ca plasticizer DIOCTYL TETREPHTHLATE Bis(2-ethylhexyl)terephthalat di-(2-ethylhexyl)terephthalate Bis(2-ethylhexyl) terephthalate BIS(2-ETHYLHEXYL)-1,4-BENZENEDICARBOXYLATE bis(2-ethylhexyl) benzene-1,4-dicarboxylate bis[(2R)-2-ethylhexyl] benzene-1,4-dicarboxylate bis[(2S)-2-ethylhexyl] benzene-1,4-dicarboxylate 1,4-Benzenedicarboxylic acid bis(2-ethylhexyl) ester benzene-1,4-dicarboxylic acid bis(2-ethylhexyl)ester (2R)-2-ethylhexyl (2S)-2-ethylhexyl benzene-1,4-dicarboxylate Bis(2-ethylhexyl) terephthalate, PA-6 Plasticizer adhesive |
| CAS | 6422-86-2 |
| EINECS | 229-176-9 |
| InChI | InChI=1/C24H38O4/c1-5-9-11-19(7-3)17-27-23(25)21-13-15-22(16-14-21)24(26)28-18-20(8-4)12-10-6-2/h13-16,19-20H,5-12,17-18H2,1-4H3/t19-,20-/m1/s1 |
Bis(2-ethylhexyl) terephthalate - Physico-chemical Properties
| Molecular Formula | C24H38O4 |
| Molar Mass | 390.56 |
| Density | 0.986 g/mL at 25 °C (lit.) |
| Melting Point | -48 °C |
| Boling Point | 400 °C (lit.) |
| Flash Point | 230°F |
| Water Solubility | insoluble |
| Solubility | Aqueous Base (Slightly) |
| Vapor Presure | 1 mm Hg ( 217 °C) |
| Appearance | Liquid |
| Color | Clear colorless |
| Storage Condition | 2-8°C |
| Stability | Hygroscopic |
| Refractive Index | n20/D 1.49(lit.) |
| Physical and Chemical Properties | Density 0.984 melting point 30-34°C boiling point 400°C refractive index 1.489-1.491 water-soluble insoluble |
| Use | As a plasticizer, it is widely used in soft polyvinyl chloride and cable materials, with low volatility, low temperature flexibility, water resistance, oil resistance and other characteristics |
Bis(2-ethylhexyl) terephthalate - Risk and Safety
| Safety Description | 24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 1 |
| RTECS | WZ0883500 |
| HS Code | 29173990 |
Bis(2-ethylhexyl) terephthalate - Upstream Downstream Industry
Bis(2-ethylhexyl) terephthalate - Reference Information
| LogP | 8.34 at 20℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Background | dioctyl terephthalate (DOTP) is an excellent primary plasticizer for polyvinyl chloride (PVC) plastics. Compared with the commonly used diisooctyl phthalate (DOP), it has the advantages of heat resistance, cold resistance, difficult volatilization, anti-extraction, flexibility and good electrical insulation performance, and shows excellent durability in products, resistance to soap water and low temperature flexibility. Because of its low volatility, the use of DOTP can fully meet the requirements of the temperature resistance grade of wire and cable, and can be widely used in the 70 ℃ cable material (IEC standard of International Electrotechnical Commission) and other soft PVC products. |
| Application | DOTP in addition to a large number of plasticizers for cable materials, PVC, can also be used in the production of artificial leather film. In addition, DOTP has excellent compatibility, can also be used for acrylonitrile derivatives, polyvinyl butyral, nitrile rubber, nitrocellulose and other plasticizers, can also be used for synthetic rubber plasticizers, coating additives, precision instrument lubricants, lubricant additives, can also be used as a softening agent for paper. |
| preparation | a separation method of terephthalic acid dioctyl Ester, specifically for the following steps:(1) terephthalic acid, isooctyl alcohol is placed in the reaction kettle according to the molar ratio of 1:3, the temperature is increased to 180 ℃, and the stirring is continued during the period, then the catalyst is added, the temperature is further increased, the temperature is maintained at 205 ℃, and the stirring speed is increased, the use of 300r/min speed of rapid stirring for 15 minutes helps the catalyst to be fully dispersed in the raw material to ensure sufficient reaction, while accelerating the stirring to make the catalyst rapid temperature, to avoid the organic titanium catalyst in the slow heating process of hydrolysis;(2) neutralization and dealcoholization treatment the prepared dioctyl terephthalate semi-finished product is added with 0.5% terephthalic acid mass fraction of alkaline decolorizing agent, and then isooctyl alcohol is distilled off under reduced pressure. After dealcoholization is completed, heat preservation treatment at 205 ℃ is continued for 15 minutes, secondary decompression and dealcoholization;(3) filtration treatment the dealcoholized material is filtered while hot to obtain material A, the material A is cooled to 150 ℃, and the material B is obtained by secondary filtration, the material B was cooled to 100 °c and filtered three times to obtain material C; Then the material C was cooled to room temperature, Four Times of filtration, that is, the treatment is completed to obtain the final product dioctyl terephthalate. |
| Application | low volatility, good low-temperature flexibility, water resistance, oil resistance, electrical and oxygen resistance, it can be widely used as plasticizer for soft PVC and cable materials. as a plasticizer widely used in soft PVC and cable materials, with low volatility, low temperature flexibility, water resistance, oil resistance and other characteristics |
| production method | 1. Transesterification method? Dimethyl terephthalate is transesterified with isooctyl alcohol in the presence of a catalyst, followed by neutralization, washing, dealcoholization, decolorization, and pressure filtration to obtain DOTP. 2. Direct esterification method???? Under the catalysis of tetrabutyl titanate and zinc acetate, terephthalic acid was directly esterified with isooctyl alcohol to obtain DOTP. 3. Waste polyester fiber method???? The polyester filament is first degraded into a monoester (alcoholysis) and then transesterified with an alcohol. |
| category | toxic substances |
| toxicity grade | low toxicity |
| Acute toxicity | oral-mouse LDL0: 20000 mg/kg |
| flammability hazard characteristics | flammable; Thermally decomposed stimulus smoke |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| extinguishing agent | dry powder, foam, sand, carbon dioxide, water mist |
| 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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