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Dimethyl terephthalate

Product Name
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
Formula Weight
194.18
MOL File
120-61-6.mol
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Dimethyl terephthalate Property

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)
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Safety

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
Hazardous Substances Data
120-61-6(Hazardous Substances Data)
Toxicity
LD50 orally in Rabbit: 3200 mg/kg
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H317May cause an allergic skin reaction

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P272Contaminated work clothing should not be allowed out of the workplace.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P321Specific treatment (see … on this label).

P333+P313IF SKIN irritation or rash occurs: Get medical advice/attention.

P363Wash contaminated clothing before reuse.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
8.08177
Product name
Dimethyl terephthalate
Purity
for synthesis
Packaging
100g
Price
$34.6
Updated
2024/03/01
Sigma-Aldrich
Product number
8.08177
Product name
Dimethyl terephthalate
Purity
for synthesis
Packaging
1kg
Price
$65.1
Updated
2024/03/01
Sigma-Aldrich
Product number
8.08177
Product name
Dimethyl terephthalate
Purity
for synthesis
Packaging
2.5kg
Price
$143
Updated
2024/03/01
Sigma-Aldrich
Product number
185124
Product name
Dimethyl terephthalate
Purity
ReagentPlus , ≥99%
Packaging
3kg
Price
$148
Updated
2024/03/01
Sigma-Aldrich
Product number
07038
Product name
Dimethyl terephthalate
Purity
Standard for quantitative NMR, TraceCERT
Packaging
1g
Price
$208
Updated
2024/03/01
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Dimethyl terephthalate Chemical Properties,Usage,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 widely as an industrial intermediate to manufacture polyethylene terephthalate (PET) and dioctyl terephthalate (OECD, 2001).It is used in the Polyester Film (Audio/Video Tape,X-ray Film,Photo Film), Polyester Fiber, Pet Bottle, Polyester Adhesive, Engineering Plastics. DMT is volatile, it is an intermediate in some schemes for the recycling of PET.

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.

Application

Dimethyl terephthalate undergoes enzymatic polycondensation with 1,8-diaminooctane to yield oligo(octamethylene terephthalamide).
Dimethyl terephthalate was used to synthesize silicone aromatic polyesters by the transesterification reaction with α,ω-bis(hydroxyalkyl)-terminated poly(dimethylsiloxane) in toluene. It was used in the synthesis of multiblock copolymers consisting of polyiso-butylene, dimethyl terephthalate and 1,4-butanediol.

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.

Synthesis Reference(s)

Chemistry Letters, 15, p. 851, 1986
Journal of the American Chemical Society, 111, p. 8742, 1989 DOI: 10.1021/ja00205a039
Tetrahedron Letters, 17, p. 3299, 1976

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

Potential Exposure

Tumorigen,Mutagen. Primary Irritant. Essentially all DMT is consumedin the production of polyethylene terephthalate, the polymerfor polyester fibers and polyester films. Less than 2% ofproduction is used to make polybutylene terephthalateresins and other specialty products

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Seek medical attention immediately. Ifthis chemical has been inhaled, remove from exposure,begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.

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.

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with DMT youshould be trained on its proper handling and storage. Storein tightly closed containers in a cool, well-ventilated areaaway from oxidizers, nitrates, acids,Wear protective gloves andclothing to prevent any reasonable probability of skin contact. Safety equipment suppliers/manufacturers can providerecommendations on the most protective glove/clothingmaterial for your operation. All protective clothing (suits,gloves, footwear, headgear) should be clean, available eachday, and put on before work. Contact lenses should not beworn when working with this chemical. Wear dust-proofchemical goggles and face shield unless full face-piecerespiratory protection is worn. Employees should washimmediately with soap when skin is wet or contaminated.Provide emergency showers and eyewash. and sources of ignition.A regulated, marked area should be established where thischemical is handled, used, or stored in compliance withOSHA Standard 1910.1045.

Shipping

Wear protective gloves andclothing to prevent any reasonable probability of skin contact. Safety equipment suppliers/manufacturers can providerecommendations on the most protective glove/clothingmaterial for your operation. All protective clothing (suits,gloves, footwear, headgear) should be clean, available eachday, and put on before work. Contact lenses should not beworn when working with this chemical. Wear dust-proofchemical goggles and face shield unless full face-piecerespiratory protection is worn. Employees should washimmediately with soap when skin is wet or contaminated.Provide emergency showers and eyewash.

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.] .

Incompatibilities

Incompatible with strong acids, nitrates,strong oxidizers.

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Dimethyl terephthalate Suppliers

Pand (Shanghai) international trade Co., LTD
Tel
18662931292 18662931292
Email
3404730042@qq.com
Country
China
ProdList
4765
Advantage
58
Yangzhou modier Electronic Materials Co., Ltd
Tel
0514-82098883; 13761402923
Email
market@modeltemol.com
Country
China
ProdList
906
Advantage
58
WUHAN JIXINYIBANG BIOTECHNOLOGY .,LTD
Tel
027-59768661 13297943853
Email
1704244976@qq.com
Country
China
ProdList
4417
Advantage
58
Nantong Zhonghe Chemical New Materials Co., Ltd
Tel
13003551299 13003551299
Email
2369399482@qq.com
Country
China
ProdList
7566
Advantage
58
Jiangsu Raien Environmental Protection Technology Co., Ltd
Tel
0513-0513-66814573 16651336298
Email
16651336298@163.com
Country
China
ProdList
3615
Advantage
58
Jiangsu Runfeng Synthetic Technology Co., Ltd.
Tel
18551497631 18551497631
Email
507167383@qq.com
Country
China
ProdList
4968
Advantage
58
NANJING YIHUA BIOTECHNOLOGY Co., Ltd
Tel
15171470753
Email
3105244229@qq.com
Country
China
ProdList
284
Advantage
58
J & K SCIENTIFIC LTD.
Tel
010-82848833 400-666-7788
Fax
86-10-82849933
Email
jkinfo@jkchemical.com
Country
China
ProdList
94657
Advantage
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Meryer (Shanghai) Chemical Technology Co., Ltd.
Tel
021-61259108 18621169109
Fax
86-21-61259102
Email
market03@meryer.com
Country
China
ProdList
40228
Advantage
62
Alfa Aesar
Tel
400-6106006
Fax
021-67582001/03/05
Email
saleschina@alfa-asia.com
Country
China
ProdList
30123
Advantage
84
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View Lastest Price from Dimethyl terephthalate manufacturers

HebeiShuoshengImportandExportco.,Ltd
Product
Dimethyl terephthalate 120-61-6
Price
US $6.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
2000KG/Month
Release date
2024-08-02
Watson Biotechnology Co.,Ltd
Product
Dimethyl Terephthalate(DMT) 120-61-6
Price
US $35.00-3.50/kg
Min. Order
1kg
Purity
99%
Supply Ability
20MT
Release date
2024-07-19
Hebei Zhuanglai Chemical Trading Co.,Ltd
Product
Dimethyl Terephthalate 120-61-6
Price
US $100.00-45.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
20ton
Release date
2024-05-06

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