Chemical Properties of Aniline-o-sulfonic acid (CAS 88-21-1)

Aniline-o-sulfonic acid

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InChI Key
Molecular Weight1
Other Names
  • 1-Aminobenzene-2-sulfonic acid
  • 2-Aminobenzenesulfonic acid
  • 2-Aminobenzenesulphonic acid
  • Aniline-2-sulfonic acid
  • Aniline-o-sulphonic acid
  • Anilino-2-sulfonic acid
  • Anilino-o-sulfonic acid
  • Anilino-o-sulphonic acid
  • Benzenesulfonic acid, 2-amino-
  • Benzenesulfonic acid, o-amino-
  • NSC 147
  • Orthanilic acid
  • o-Aminobenzenesulfonic acid
  • o-Aminophenylsulfonic acid
  • o-Sulfanilic acid

Physical Properties

Property Value Unit Source
Δcsolid -3363.90 ± 0.60 kJ/mol NIST
Δf -436.49 kJ/mol Joback Calculated Property
Δfgas -513.90 kJ/mol Joback Calculated Property
Δfsolid -559.60 ± 1.10 kJ/mol NIST
Δfus 25.61 kJ/mol Joback Calculated Property
Δvap 77.84 kJ/mol Joback Calculated Property
logPoct/wat 0.516 Crippen Calculated Property
Pc 7255.44 kPa Joback Calculated Property
Tboil 580.83 K Joback Calculated Property
Tc 787.92 K Joback Calculated Property
Tfus 378.96 K Joback Calculated Property
Vc 0.438 m3/kg-mol Joback Calculated Property

Temperature Dependent Properties

Property Value Unit Temperature (K) Source
Cp,gas 261.80 J/mol×K 580.83 Joback Calculated Property

Molecular Descriptors

Joback and Reid Groups
=CH- (ring) 4
-OH (alcohol) 1
-NH2 1
=C< (ring) 2
-S- 1
=O 2

Similar Compounds

3-Amino-p-toluene sulfonic acid. 2-Naphthylamine-1-sulfonic acid. Benzenesulfonic acid, 4-amino-. Metanilic acid. Benzenesulfonic acid, p-hydrazino-. Sulfanilic acid, n-methyl-, sodium salt. Noname. BENZENESULFONIC ACID. Benzenesulfonic acid, sodium salt. Sodium diphenylamine-p-sulfonate. P-phenylazobenzene sulfonic acid. Benzenesulfonic acid, 4-hydroxy-. Noname. O-aminobenzenesulfonamide. Benzenesulfonic acid, methyl ester.

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