4-(Phenylamino)benzenesulfonic acid

  • N-Phenylsulfanilic acid
  • p-Anilinobenzenesulphonic acid
  • 4-Sulfodiphenylamine
  • 4-Anilinobenzenesulfonic acid
  • Diphenylamine-p-sulfonic acid
  • p-Anilinobenzenesulfonic acid
Formula
C12H11NO3S
Structure
Description
Typically distributed as an odorless, aqueous solution.
Uses
Oxidation-reduction indicator.

Registry Numbers and Inventories.
CAS
101-57-5
EC (EINECS/ELINCS)
202-955-0
Merck
12,7466
Beilstein/Gmelin
2216593
Beilstein Reference
3-14-00-02025
Canada DSL/NDSL
NDSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed

Properties.
Formula
C12H11NO3S
Formula mass
249.29
Melting point, °C
206
Boiling point, °C
427
Density
1.40 g/cm3
Solubility in water
Very soluble
Refractive index
 
pKa/pKb
1.57 (pKa)
Partition coefficient, pKow
1.923

Hazards and Protection.
Protection
Wear goggles and rubber gloves while handling.
Small spills/leaks
Wash up with water. Disposal to sanitary drain acceptable in most localities. Check local sewerage regulations.

Fire.
Fire fighting
Fight surrounding fire.

Health.
Exposure effects

First aid
 
   Ingestion
If swallowed, give milk or water with milk of magnesia and induce vomiting. Call a physician.
   Skin
Wash up with water after contact.

Transport.