Dimethyl terephthalate
- CAS No.
- 120-61-6
- Chemical Name:
- Dimethyl terephthalate
- Synonyms
- DMT;dimethy;TEREPHTHALIC ACID DIMETHYL ESTER;Dimethyl p-phthalate;Terephthalate, dimethyl;methylp-(methoxycarbonyl)benzoate;DIMETHYL BENZENE-1,4-DICARBOXYLATE;NSC 3503;NCI-C50055;Dimethyl p-ben
- CBNumber:
- CB9170694
- Molecular Formula:
- C10H10O4
- Molecular Weight:
- 194.18
- MOL File:
- 120-61-6.mol
- MSDS File:
- SDS
- Modify Date:
- 2024/10/11 9:49:35
| Melting point | 140 °C |
|---|---|
| Boiling point | 288 °C |
| Density | 1,29 g/cm3 |
| vapor density | 1.04 (vs air) |
| vapor pressure | 1.15 mm Hg ( 93 °C) |
| refractive index | 1.4752 |
| Flash point | 154 °C |
| storage temp. | Store below +30°C. |
| solubility | water: slightly soluble0.0493g/L at 20°C |
| form | Flakes or Pellets |
| pka | 0[at 20 ℃] |
| color | White |
| explosive limit | 0.8-11.8%(V) |
| Water Solubility | It is slightly soluble in water but soluble in hot alcohol and ether. |
| Merck | 14,9162 |
| BRN | 1107185 |
| Stability | Stable. Incompatible with strong acids, strong bases, strong oxidizing agents. |
| LogP | 2.25 at 25℃ |
| CAS DataBase Reference | 120-61-6(CAS DataBase Reference) |
| EPA Substance Registry System | Dimethyl terephthalate (120-61-6) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H317 | |||||||||
| Precautionary statements | P261-P272-P280-P302+P352-P333+P313-P321-P363-P501 | |||||||||
| Risk Statements | 36/37/38 | |||||||||
| Safety Statements | 24/25 | |||||||||
| RIDADR | 3256 | |||||||||
| WGK Germany | 1 | |||||||||
| RTECS | WZ1225000 | |||||||||
| Autoignition Temperature | 520 °C DIN 51794 | |||||||||
| TSCA | Yes | |||||||||
| HS Code | 2917 37 00 | |||||||||
| Toxicity | LD50 orally in Rabbit: 3200 mg/kg | |||||||||
| NFPA 704 |
|
Dimethyl terephthalate price More Price(14)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich(India) | 86440 | Dimethyl terephthalate purum, ≥99.0% (GC) | 120-61-6 | 50G | ₹2321 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 86440 | Dimethyl terephthalate purum, ≥99.0% (GC) | 120-61-6 | 250G | ₹2426.5 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 86440 | Dimethyl terephthalate purum, ≥99.0% (GC) | 120-61-6 | 1KG | ₹4167.25 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 8.08177 | Dimethyl terephthalate for synthesis | 120-61-6 | 100G | ₹3010 | 2022-06-14 | Buy |
| Sigma-Aldrich(India) | 8.08177 | Dimethyl terephthalate for synthesis | 120-61-6 | 1KG | ₹3589.99 | 2022-06-14 | Buy |
Dimethyl terephthalate Chemical Properties,Uses,Production
Description
Dimethyl terephthalate (DMT) is an organic compound with the formula C6H4(CO2CH3)2. It is the diester formed from terephthalic acid and methanol. It is a white solid that melts to give a distillable colourless liquid.
Chemical Properties
The empirical formula of dimethyl terephthalate (DMT) is C10H10O4. Its structural formula is 1,4-(COOCH3)2C6H4. At room temperature, exists as colorless crystals. DMT is soluble in ether and chloroform, slightly soluble in ethanol, and fairly insoluble in water (<1 g/L at 13℃).
Uses
Dimethyl terephthalate is used in the production of polyesters, including polyethylene terephthalate (PET) and poly trimethylene terephthalate. It consists of benzene substituted with carboxy methyl groups (CO2CH3) at the 1 and 4 positions. Because DMT is volatile, it is an intermediate in some schemes for the recyclic of PET, e.g. from plastic bottles.
Hydrogenation of DMT affords the diol cyclohexanedimethanol, which is a useful monomer.
Production Methods
Dimethyl terephthalate (DMT) has been produced in a number of ways. Conventionally and still of commercial value is the direct esterification of terephthalic acid. Alternatively, it can be prepared by alternating oxidation and methyl-esterification steps from p-xylene via methyl-p-toluate.
Definition
ChEBI: Dimethyl terephthalate is a diester resulting from the formal condensation of the carboxy groups of terephthalic acid with methanol. It is a primary ingredient widely used in the manufacture of polyesters and industrial plastics. It is a methyl ester, a diester and a phthalate ester. It derives from a terephthalic acid.
Preparation
Several processes have been developed for the preparation of dimethyl
terephthalate from p-xylene, but the most important proceeds as follows:
The oxidation steps are carried out in the liquid phase at about 170??C and 1.5 MPa (15 atmospheres) in the presence of a cobalt acetate or naphthenate catalyst whilst the esterifications are conducted at about 150??C. Dimethyl terephthalate may also be produced by esterification of terephthalic acid.
General Description
Dimethyl terephthalate appears as white solid or heated colorless liquid. Has no odor. Liquid solidifies in cool water. Solid and liquid sink in water. (USCG, 1999)
Air & Water Reactions
When mixed with air, the vapor or dust forms very hazardous and highly reactive mixtures. . Insoluble in water.
Reactivity Profile
DIMETHYL TEREPHTHALATE is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. Can generate electrostatic charges. [Handling Chemicals Safely 1980. p. 250]. DIMETHYL TEREPHTHALATE is sensitive to heat. The molten material reacts with water due to the temperature. DIMETHYL TEREPHTHALATE is incompatible with strong oxidizers, strong acids and strong bases.
Hazard
H317 (56.25%): May cause an allergic skin reaction [Warning Sensitization, Skin]
H319 (14.06%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H412 (29.69%): Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]
Health Hazard
Molten DMT will cause severe burns of skin on contact.
Fire Hazard
DIMETHYL TEREPHTHALATE is combustible.
Safety Profile
Moderately toxic by intraperitoneal route. Mdly toxic by ingestion. An eye irritant. Mutation data reported. When heated to decomposition it emits acrid smoke and irritating fumes
Carcinogenicity
In a study conducted by the NCI, DMT was not considered to be carcinogenic in rats or mice ingesting 2500 or 5000 ppm in the diet for 103 weeks.
Source
Dimethyl terephthalate is a natural product found in Hypotrachyna nepalensis, Uncaria elliptica, and other organisms with data available.
Purification Methods
Purify it by recrystallisation from aqueous EtOH, MeOH or CCl4; or by zone melting. [Beilstein 6 H 843, 6 III 4250, 6 IV 3303.] .
Dimethyl terephthalate Preparation Products And Raw materials
Raw materials
1of3
chevron_rightPreparation Products
1of3
chevron_right| Supplier | Tel | Country | ProdList | Advantage | Inquiry |
|---|---|---|---|---|---|
| Hyderabad | +91-9676447615 +91-9676447615 | Telangana, India | 192 | 58 | Inquiry |
| CNS CHEMICALS | +91-9381957258 +91-9381957258 | Telangana, India | 354 | 58 | Inquiry |
| Merck Ltd | +91-2262109800 +91-2262109000 | Maharashtra, India | 272 | 58 | Inquiry |
| Chemofine Dyes and Chemicals Pvt., Ltd. | +91-22900400 +91-2225788202 | Mumbai, India | 6 | 58 | Inquiry |
| CLEARSYNTH LABS LTD. | +91-22-45045900 | Hyderabad, India | 6351 | 58 | Inquiry |
| Alfa Aesar | 1 800 209 7001 | Maharashtra, India | 6913 | 58 | Inquiry |
| Sisco Research Laboratories Pvt. Ltd. | +91-22-4268 5800 | Mumbai, India | 4317 | 58 | Inquiry |
| Triveni chemicals | 08048762458 | New Delhi, India | 6093 | 58 | Inquiry |
| Sarna Chemicals Pvt.Ltd | 08048372352Ext 461 | Gujarat, India | 8 | 58 | Inquiry |
| A.J Chemicals | 91-9810153283 | New Delhi, India | 6124 | 58 | Inquiry |
| Supplier | Advantage |
|---|---|
| Hyderabad | 58 |
| CNS CHEMICALS | 58 |
| Merck Ltd | 58 |
| Chemofine Dyes and Chemicals Pvt., Ltd. | 58 |
| CLEARSYNTH LABS LTD. | 58 |
| Alfa Aesar | 58 |
| Sisco Research Laboratories Pvt. Ltd. | 58 |
| Triveni chemicals | 58 |
| Sarna Chemicals Pvt.Ltd | 58 |
| A.J Chemicals | 58 |
Related articles
- Dimethyl Terephthalate: Applications in Organic Synthesis and its Genotoxicity
- Dimethyl terephthalate is vital for polymers and derivatives, showing nongenotoxic properties in vitro, yet revealing potentia....
- Oct 11，2024
120-61-6(Dimethyl terephthalate)Related Search:
1of4
chevron_right