o-hydroxybenzenesulphonic acid Chemical Properties

Melting point:

145°C (rough estimate)

Boiling point:

275.14°C (rough estimate)

Density 

1.384 (estimate)

refractive index 

1.5500 (estimate)

form 

solid

pka

-0.60±0.15(Predicted)

EPA Substance Registry System

o-Phenolsulfonic acid (609-46-1)

o-hydroxybenzenesulphonic acid Usage And Synthesis

Definition

ChEBI: An arenesulfonic acid that is phenol substituted by a sulfo group at C-2.

Production Methods

If phenol is sulfonated with an equal amount of 100% sulfuric acid under mild conditions, a mixture consisting of 2-hydroxy- and 4-hydroxybenzenesulfonic acid in a ratio of roughly 2:3 is obtained. The 2-hydroxybenzenesulfonic acid (o-hydroxybenzenesulphonic acid) can be isolated from this mixturevia the monobarium salt. The pure compound is obtained by diazotizing 2- aminobenzenesulfonic acid and boiling it under acid conditions.

o-hydroxybenzenesulphonic acid(609-46-1)Related Product Information

• PHENOLSULFONIC ACID
• Protocatechuic acid
• Sodium isethionate