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.
Terephthalic acid is a white crystalline solid. Soluble in alkaline solution, slightly soluble in hot ethanol, insoluble in water, ether, glacial acetic acid, consequently up until around 1970 most crude terephthalic acid was converted to the dimethyl ester for purification. It sublimates when heated.
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, butylene glycol, etc. preparation of the polyester plasticizer.
Terephthalic acid (TPA) is a benzenepolycarboxylic acid with potential anti-hemorrhagic properties. It is a high-tonnage chemical, widely used in the production of synthetic materials, notably polyester fibers (poly-(ethylene terephthalate)).
Application:
Boric acid (H3BO3) is a solid, soft, smooth, solid weak acid that is used and cosmetic industries.
It is chemical used for making ceramics, glazes, cements, wicks, food preservatives, special glasses; Also for leather dressing compounds for preparation of hides prior to tanning; Artificial precious stones; As flux in metallurgical industry, fire-proofing compositions and linings for safes; Also for pigments; Enamel paints, paper glazes, cosmetics, soaps, textiles, medicines, etc.
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