PTA

• Category :

  Organic chemicals and Derivatives

• Synonyms :

  Benzene-1,4-dicarboxylic acid;P-Phthelic Acid;p-Phthalic acid;1,4-dicarboxybenzene;1,4-phthalicacid;Acide terephtalique;acideterephtalique;acideterephtalique(french);Benzene-p-dicarboxylic acid;Kyselina tereftalova;Kyselina terftalova;(1aR,1bS,4aR,7aS,7bS,8R,9R,9aS)-4a,7b,9,9a-tetrahydroxy-3-(hydroxymethyl)-1,1,6,8-tetramethyl-1,1a,1b,4,4a,7a,7b,8,9,9a-decahydro-5H-cyclopropa[3,4]benzo[1,2-e]azulen-5-one;PTA;

• CAS NO :

  100-21-0

• EC NO :

  202-830-0

• Molecular Formula :

  C₈H₆O₄

• Molecular Weight :

  166.13324

• Main Specifications :

• InChI :

  InChI=1/C8H6O4/c1-9-5-13-18(24,15(9)22)7-11(8-21)6-12-14-17(3,4)20(14,26)16(23)10(2)19(12,13)25/h5-6,10,12-14,16,21,23-26H,7-8H2,1-4H3/t10-,12+,13-,14-,16-,18-,19-,20-/m1/s1

• Product description :

  Formula: C8H6O4

  Description: White needle crystal or powder

  Uses牋牋 : As a reagent for alkali in wool , additive to poultry feeds.

  Chemical and physical properties
  Combustibility: 牋Flammable
  Toxicity牋牋 : 牋牋Low toxicity
  Density牋牋 : 牋1.510 g/cm3
  Sublimation :牋 402 ℃ ( Under natural pressure)
  Melting point:牋 425 ℃ (in a gland )
  Solubility牋 :dissolving in hot grain alcohol , not dissolving in water, aether , glacial acetic acid and chloroform.

  PTA Specification:

  Package and storage
  Storage牋牋 : Keep container closed when not in use, Store in a cool, dry,well-ventilated area away from strong oxidizing substances.
  Package牋牋 :牋 Pocket by measured or pocket in tank car

  Preparation
  High temp. oxidation:牋 While acetic acid as solvent, Co,Mn,燘r admixture as catalyzer p-xylene will oxidate into crude terephthalic acid . Under certain temperature and pressure. Then CTA dissolve into water under high temperature and pressure. And passa Pd/C catalyzer settled vessel which is a reactor where the oxidation production will be hydrogenated in order to removeimpurity(4-CBA).Afterward.the hydrogenation production will become the final production(PTA) after crystallizing filtrating P-Tol acid and drying.牋牋

  Health related information
  Ingestion牋 :牋 May cause irritation fo the digestive tract
  Inhalation : 燙auses respiratory tract irritation
  Skin牋牋牋牋 :牋 Causes slight skin irritation
  Eyes牋牋牋牋 :牋 Causes eye irritation

  Test Item	Specification
  PTA Content%	99%
  Metal(Fe,Mo,Cr,Ti,Mn,Ni,Co)ppm≤	≤4ppm
  Moisture %≤	≤0.5%
  Fe ppm≤	2ppm
  DMF Chroma.5%Liquor	10
  4-CBA ppm≤	≤25ppm
  Acid Num(mg KOH/g)	6752

• Molecular Structure :