4-Amino-1,3-benzenedisulfonic acid
- CAS NO.：137-51-9
- Empirical Formula: C6H7NO6S2
- Molecular Weight: 253.25
- MDL number: MFCD00035903
- EINECS: 205-299-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-04-23 13:52:06
What is 4-Amino-1,3-benzenedisulfonic acid?
The Uses of 4-Amino-1,3-benzenedisulfonic acid
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
Properties of 4-Amino-1,3-benzenedisulfonic acid
| 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) |
| form | Solid |
| pka | -0.93±0.48(Predicted) |
| color | White to Grey |
| Water Solubility | 4.3g/L at 21℃ |
| Stability: | Hygroscopic |
| CAS DataBase Reference | 137-51-9(CAS DataBase Reference) |
| EPA Substance Registry System | 1,3-Benzenedisulfonic acid, 4-amino- (137-51-9) |
Safety information for 4-Amino-1,3-benzenedisulfonic acid
| Signal word | Danger |
| Pictogram(s) |
 Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H314:Skin corrosion/irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P280:Wear protective gloves/protective clothing/eye protection/face protection. P310:Immediately call a POISON CENTER or doctor/physician. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 4-Amino-1,3-benzenedisulfonic acid
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