Terephthalic acid

Superiority:

Product Name:    Terephthalic acid

CAS:    100-21-0
MF:    C8H6O4
MW:    166.13
EINECS:    202-830-0

Melting point     >300 °C (lit.)
Boiling point     214.32°C (rough estimate)
density     1.58 g/cm3 at 25 °C
vapor pressure     <0.01 mm Hg ( 20 °C)
refractive index     1.5100 (estimate)
Fp     260°C
storage temp.     0-6°C
solubility     15mg/l (experimental)
pka    3.51(at 25℃)
form     Crystalline Powder
color     White
Water Solubility     slightly soluble in water (0,017 g/L at 25°C)
Merck     14,9162
BRN     1909333

Description    Terephthalic acid is the organic compound with formula C6H4(COOH)2. This colourless solid is a commodity chemical, used principally as a precursor to the polyester PET, used to make clothing and plastic bottles. Several million tones are produced annually. It is one of three isomeric phthalic acids.
Chemical Properties    Terephthalic acid is poorly soluble in water and alcohols, consequently up until around 1970 most crude terephthalic acid was converted to the dimethyl ester for purification. It sublimates when heated.
Chemical Properties    TPA is a white crystalline solid.
Chemical Properties    white powder
History    Terephthalic acid came to prominence through the work of Winfield and Dickson in Britain around 1940. Earlier work by Carothers and coworkers in the United States established the feasibility of producing high molecular weight linear polyesters by reacting diacids with diols, but they used aliphatic diacids and diols. These made polyesters which were unsuitable to be spun into fibers. Winfield and Dickson found that symmetrical aromatic diacids yield high-melting, crystalline, and fiberforming materials; poly(ethylene terephthalate) (PET) has since become the largest volume synthetic fiber.
Uses    Terephthalic acid (TPA) is a high-tonnage chemical, widely used in the production of synthetic materials, notably polyester fibers (poly-(ethylene terephthalate)).
Uses    Terephthalic acid is a benzenepolycarboxylic acid with potential anti-hemorrhagic properties.
Uses    1,4-benzenedicarboxylic acid is mainly used for the production of poly (ethylene terephthalate). Also production of plasticizer dioctyl phthalate (DOTP) and polyester plasticized agents. 1,4-benzenedicarboxylic acid and polyhydric alcohols have a condensation reaction withd iethylene glycol, triethylene glycol, glycerol, propylene glycol, butylene glycol, etc. preparation of the polyester plasticizer.
Definition    ChEBI: A benzenedicarboxylic acid carrying carboxy groups at positions 1 and 4. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and isophthalic acids.