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DIMETHYL TEREPHTHALATE |
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PRODUCT IDENTIFICATION |
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| CAS NO. |
120-61-6 |
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| EINECS NO. | 204-411-8 | |
| FORMULA | C6H4(COOCH3)2 | |
| MOL WT. | 194.19 | |
|
H.S. CODE |
2917.37 | |
| DERIVATION |
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| TOXICITY | Oral rat LD50: > 3200 mg/kg | |
| SYNONYMS | Terephthalic acid methyl ester; DMT; | |
| Methyl Terephthalate; Dimethyl-p-phthalate; D.M.T.; 1,4-Benzenedicarboxylic acid, dimethyl ester; Di-Me terephthalate; Dimethylester kyseliny tereftalove; Methyl 4-carbomethoxybenzoate; Methyl-p-(methoxycarbonyl)benzoate; Dimethyl 4-phthalate; Dimethyl ester of 1,4-Benzenedicarboxylic acid; Dimethyl-1,4-benzenedicarboxylate; | ||
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CLASSIFICATION |
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GENERAL DESCRIPTION |
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Phthalic Acid, also called Benzenedicarboxylic Acid with formula C6H4(COOH)2, is
the name of any of three isomers. The ortho form (1,2-benzenecarboxylic acid)
is called simply phthalic acid. It is a white crystals decomposing at 191°C and
slightly soluble in water and ether. This compound is mainly produced and
marketed in the form of its anhydride produced by the oxidation of orthoxylene
and naphthalene. Its wide application is based on the ortho related carboxylic
acid groups as their dehydration is highly reactive with broad processing
conditions to produce various downstream products. It is used to make simple
esters widely used as plasticizers. It is used as in making unsaturated
polyester resins, alkyd resins, polyester polyols, dyes and pigments,
halogenated anhydrides, polyetherimide resins, isatoic anhydride and insect
repellents. The meta form is isophthalic acid (1,3-benzenecarboxylic acid). It
is a white crystals subliming at 345°C slightly soluble in water, alcohol and
acetic acid (insoluble in benzene). It is obtained by oxidizing meta-xylene with
chromic acid, or by fusing potassium meta-sulphobenzoate, or meta-brombenzoate
with potassium formate. IPA has excellent performance characteristics in coatings including excellent
hardness, corrosion and stain resistance, hydrolytic stability of coatings and
gel coats, excellent thermal stability and low resin color. It is a key ingredient in FRP markets for such products
as marine, automotive, and corrosion resistant pipes and tanks. Polyesters
containing isophthalic acid are also used extensively in industrial coatings
applications for home appliances, automobiles, aluminum siding, and metal office
furniture. It used as an intermediate for polyesters, polyurethane resins,
plasticizers. The para form, known as terephthalic acid (1,4-benzenecarboxylic
acid) is a combustible white powder insoluble in water, alcohol and ether;
(soluble in alkalies), sublimes at 300°C. It can be produced by oxidizing
caraway oil, a mixture of cymene and cuminol or by oxidizing para-diderivatives
of benzene with chromic acid. TPA has been used mainly as a raw material of
polyester fiber but lately it has been exploited for various uses such as
non-fiber field, PET-bottle, PET-film and engineering plastics and as poultry
feed additives. Phthalic acid derivatives are also widely used to make dyes,
medicine, and synthetic perfumes, pesticides, and other chemical compounds.
Dimethyl terephthalate (DMT) is an ester of terephthalic acid and methanol. DMT is a primary ingredient used in the manufacture of polyesters and industrial plastics. It is a building block for an assortment of products--from X-ray and video films to polyester fibers and electrical capacitors. It also is found in many automotive components, such as reinforcing beams, bumpers, windshield wiper blades, electrical systems, and hubcaps. DMT is an ideal choice for virtually any industrial plastics application. This compound is used as an intermediate of herbicides and a component of paints, ink and adhesives. |
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PHYSICAL AND CHEMICAL PROPERTIES |
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| PHYSICAL STATE |
White Flakes |
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| MELTING POINT | 140 - 142 C | |
| BOILING POINT | 288 C | |
| SPECIFIC GRAVITY | 1.2 | |
| SOLUBILITY IN WATER | slightly soluble (soluble in hot alcohol and ether) | |
| pH | ||
| VAPOR DENSITY | 5.5 | |
|
AUTOIGNITION |
518 C (subliming at > 300 C) |
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NFPA RATINGS |
Health:1 Flammability:1 Reactivity:0 | |
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REFRACTIVE INDEX |
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| FLASH POINT | 153 C | |
| STABILITY | Stable under ordinary conditions. | |
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APPLICATIONS |
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Polyester Film (Audio/Video Tape,X-ray Film,Photo Film), Polyester Fiber, Pet Bottle, Polyester Adhesive, Engineering Plastics. |
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| SALES SPECIFICATION | ||
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APPEARANCE |
White Flakes |
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APPEARANCE OF MELT |
Clear and free from suspended matter |
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| MELT COLOR, APHA |
15max (Initial), 25max (Final) |
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| ACID NUMBER |
0.025 max ((mg KOH/g) |
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| MELTING POINT |
140 C |
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FREE ACIDITY (AS TPA) |
0.01% max |
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IRON |
1ppm max | |
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TRANSPORTATION |
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| PACKING | 500kg, 700kg, 900kg, 1000kg in bag | |
| HAZARD CLASS | Not regulated | |
| UN NO. |
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| OTHER INFORMATION | ||
| Hazard Symbols: n/a, Risk Phrases: n/a, Safety Phrases: 24/25 | ||
