Terephthalic acid

Terephthalic acid Property

mp : 300 °C density : 1,51 g/cm3 vapor pressure : <0.01 mm Hg ( 20 °C) Fp : 260°C storage temp. : 0-6°C Merck : 14,9162 BRN : 1909333 Stability:: Stable. Combustible. Incompatible with strong oxidizing agents. CAS DataBase Reference: 100-21-0(CAS DataBase Reference)

Safety

Hazard Codes : Xi Risk Statements : 36/37/38 Safety Statements : 26-36 WGK Germany : 3 RTECS : WZ0875000

Terephthalic acid Chemical Properties,Usage,Production

Chemical Properties white powder Usage Terephthalic acid is a benzenepolycarboxylic acid with potential anti-hemorrhagic properties. Usage 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. General Description White powder. Air & Water Reactions Insoluble in water. Reactivity Profile Terephthalic acid is a carboxylic acid. Terephthalic acid donates hydrogen ions if a base is present to accept them. This "neutralization" generates substantial amounts of heat and produces water plus a salt. Insoluble in water but even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Terephthalic acid to corrode or dissolve iron, steel, and aluminum parts and containers. May react with cyanide salts to generate gaseous hydrogen cyanide. Will react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by reaction with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. React with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. May initiate polymerization reactions; may catalyze (increase the rate of) chemical reactions. Fire Hazard Flash point data for Terephthalic acid are not available. Terephthalic acid is probably combustible.

Terephthalic acid Preparation Products And Raw materials

Raw materials P-XYLENE Cobalt acetate Paraldehyde 1,1,2,2-Tetrabromoethane 4-Formylbenzoic acid Acetic acid glacial Bromide MANGANESE(II) ACETATE Manganese triacetate dihydrate

Preparation Products liquid crystalline heterocyclic polymer POLY(1,4-BUTYLENE TEREPHTHALATE) tussah silk fabric aftertreatment finishing agent 3-Aminophthalhydrazide Unsaturated polyester resin auxiliary chrome tanning agent Pigment Red 122 Terephthaloyl chloride POLY(ETHYLENE TEREPHTHALATE) Triethylene glycol dimethacrylate DIMETHYL TEREPHTHALATE Dioctyl terephthalate

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