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Dimethyl terephthalate

Dimethyl terephthalate
Dimethyl terephthalate structure
CAS No.
120-61-6
Chemical Name:
Dimethyl terephthalate
Synonyms
DMT;dimethy;NSC 3503;NCI-C50055;Dimethyl p-ben;di-meterephthalate;Methyl p-phthalate;dimethyl4-phthalate;RARECHEM AL BF 0108;Dimethyl p-phthalate
CBNumber:
CB9170694
Molecular Formula:
C10H10O4
Formula Weight:
194.18
MOL File:
120-61-6.mol

Dimethyl terephthalate Properties

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
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.
CAS DataBase Reference
120-61-6(CAS DataBase Reference)
SAFETY
  • Risk and Safety Statements
Risk Statements  36/37/38
Safety Statements  24/25
RIDADR  3256
WGK Germany  1
RTECS  WZ1225000
Autoignition Temperature 520 °C DIN 51794
TSCA  Yes
HSCode  2917 37 00
Toxicity LD50 orally in Rabbit: 3200 mg/kg

NFPA 704

Diamond Hazard Value Description
1
0
Health  
Flammability   1 Materials that require considerable preheating, under all ambient temperature conditions, before ignition and combustion can occur. Includes some finely divided suspended solids that do not require heating before ignition can occur. Flash point at or above 93.3 °C (200 °F). (e.g. mineral oil, ammonia)
Instability   0 Normally stable, even under fire exposure conditions, and is not reactive with water (e.g. helium,N2)
Special  

(NFPA, 2010)

Dimethyl terephthalate price More Price(14)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 185124 Dimethyl terephthalate ReagentPlus , ≥99% 120-61-6 3kg $112 2018-11-13 Buy
Sigma-Aldrich 07038 Dimethyl terephthalate Standard for quantitative NMR, TraceCERT 120-61-6 1g $148 2018-11-13 Buy
TCI Chemical T0015 Dimethyl Terephthalate >99.0%(GC) 120-61-6 25g $16 2018-11-22 Buy
TCI Chemical T0015 Dimethyl Terephthalate >99.0%(GC) 120-61-6 500g $24 2018-11-22 Buy
Alfa Aesar A13220 Dimethyl terephthalate, 99% 120-61-6 500g $25.7 2018-11-13 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

white chunks

Uses

DMT 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 cyclo hexane dimethanol , which is a useful monomer.

Uses

Dimethyl terephthalate (DMT) 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.

General Description

White solid or heated colorless liquid. Has no odor. Liquid solidifies in cool water. Solid and liquid sink in water.

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.

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

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

Preparation Products


Dimethyl terephthalate Suppliers

Global( 236)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
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View Lastest Price from Dimethyl terephthalate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-07-11 DMT; Dimethyl terephthalate
120-61-6
US $10.00 / KG 1KG 99.9% 10 mt Hebei Guanlang Biotechnology Co., Ltd.
2019-07-17 DMT; Dimethyl terephthalate
120-61-6
US $0.00 / Kg/Drum 1KG 99.9% 10 MT hdzhl biotechnology co., ltd

Dimethyl terephthalate Spectrum


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