2-amino-p-benzenedisulfonic Acid

Name:
2-amino-p-benzenedisulfonic Acid
Detailed information:

Chemistry name:	aniline-2,5-disulfonic acid
M Formula:	C6H3NH2(SO3H)2•4H2O
Properties:
Crystals. Very soluble in water and alcohol.
Derivation:
Boiling sodium salt of 4-chloro-3-nitrobenzene sulfonate with sodium sulfite, resulting in formation of sodium-2-nitrobenzene disulfonate, which is reduced with iron and acetic acid to aniline-2,5-disulfonic acid.
Use:
Intermediate.