Name: terephthalic acid; 1,4-benzenedicarboxylic acid; p-phthalic acid
* IUPAC
CAS Number: 100-21-0
Chemical Formula: C₈H₆O₄ or C₆H₄(COOH)₂
Molar Mass: 166.13084 g
State of Matter: white crystals/powder
Mass Percent: C 57.837 %; H 3.6402 %; O 38.522 % 
Isomers:  isophthalic acid  •  phthalic acid

• organic • aromatic • carboxylic acid

• "Forms polyesters with glycols which are made into plastic films and sheets; in analytical chemistry." 1

Melting Point:*
425°C 2 = 698.15 K = 797°F
Boiling Point:*
300°C 2 = 573.15 K = 572°F
300°C 3 = 573.15 K = 572°F

* - 1 atm pressure

Qualitative:
insoluble:  • • 3
slightly soluble:  3

Double Bonds: 5
Triple Bonds: 0
Sigma Bonds: 18
Pi Bonds: 5
Total: 23
Carboxyl Groups: 2
Hydroxyl Groups: 0
Hybridization: all carbons are sp2; double bonded oxygen is sp2; single bonded oxygen is sp3

The oxidation of p-xylene by oxygen in air:

Wikipedia

(1) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 9238.
(2) - Dean, John A. Lange's Handbook of Chemistry, 11th ed.; McGraw-Hill Book Company: New York, NY, 1973; p 7:331.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 3-38.