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Terephthalic acid (data page)

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Chemical data page

This page provides supplementary chemical data on Terephthalic acid, the organic compound and one of three isomeric phthalic acids, all with formula C6H4(CO2H)2.

Material Safety Data Sheet

The handling of this chemical may require notable safety precautions, which are set forth on the Material Safety Datasheet (MSDS) for it.SIRI

Structure and properties

Structure and properties
Index of refraction, nD ?
Abbe number ?
Dielectric constant, εr ? ε0 at ? °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?

Thermodynamic properties

Phase behavior
Triple point ? K (? °C), ? Pa
Critical point ? K (? °C), ? Pa
Std enthalpy change
of fusion, ΔfusH 		? kJ/mol
Std entropy change
of fusion, ΔfusS 		? J/(mol·K)
Std enthalpy change
of vaporization, ΔvapH 		? kJ/mol
Std entropy change
of vaporization, ΔvapS 		? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHsolid 		232 kJ/mol
Standard molar entropy,
Ssolid 		? J/(mol K)
Heat capacity, cp ? J/(mol K)
Liquid properties
Std enthalpy change
of formation, ΔfHliquid 		? kJ/mol
Standard molar entropy,
Sliquid 		? J/(mol K)
Heat capacity, cp ? J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHgas 		? kJ/mol
Standard molar entropy,
Sgas 		? J/(mol K)
Heat capacity, cp ? J/(mol K)

Spectral data

UV-Vis
λmax 240 nm
Extinction coefficient, ε ?
IR
Major absorption bands ? cm
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments 		 
  This box:   

References

  1. Lange's Handbook of Chemistry, 15th ed. McGraw Hill 1999, Section 4.1.
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