4-Amino-1,3-benzenedisulfonic acid Chemical Properties

Melting point:

>259°C (dec.)

Boiling point:

497.45℃[at 101 325 Pa]

Density 

1.844±0.06 g/cm3(Predicted)

vapor pressure 

0Pa at 25℃

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

solubility 

Aqueous Acid (Slightly), DMSO (Slightly), Methanol (Slightly), Water (Slightly)

pka

-0.93±0.48(Predicted)

form 

Solid

color 

White to Grey

Water Solubility 

4.3g/L at 21℃

Stability:

Hygroscopic

LogP

-0.959 at 21℃

CAS DataBase Reference

137-51-9(CAS DataBase Reference)

EPA Substance Registry System

1,3-Benzenedisulfonic acid, 4-amino- (137-51-9)

4-Amino-1,3-benzenedisulfonic acid Usage And Synthesis

Uses

4-Amino-1,3-benzenedisulfonic Acid is used as a reagent in the synthesis of arylazopyridoxal phosphate and phosphonate derivatives as P2 receptor antagonists.

Production Methods

4-Amino-1,3-benzenedisulfonic acid is freely soluble in water and ethyl alcohol. It is prepared by sulfonating 4-aminobenzenesulfonic acid with oleum at 20 ℃ and130 ℃ (4 – 6.5 h), draining the sulfonation mixture into water under pressure, adding lime at 70 – 75 ℃, separating the resulting gypsum, precipitating the calcium ions with soda, removing the calcium carbonate formed, and concentrating the sodium salt solution by evaporation. Yield 90 – 91%

Flammability and Explosibility

Non flammable

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