Molecular structure of 4-Hydroxybenzenesulfonamide (CAS NO.1576-43-8) is:

Product Name: 4-Hydroxybenzenesulfonamide
CAS Registry Number: 1576-43-8
IUPAC Name: 4-Hydroxybenzenesulfonamide
Molecular Weight: 173.18968 [g/mol]  
Molecular Formula: C₆H₇NO₃S  
XLogP3: 0.1  
H-Bond Donor: 2  
H-Bond Acceptor: 4
Melting Point: 174 °C
Index of Refraction: 1.614 
Molar Refractivity: 40.71 cm³ 
Molar Volume: 116.8 cm³
Surface Tension: 62.3 dyne/cm 
Density: 1.482 g/cm³ 
Flash Point: 194.2 °C 
Enthalpy of Vaporization: 67.32 kJ/mol 
Boiling Point: 397.5 °C at 760 mmHg 
Vapour Pressure: 6.89E-07 mmHg at 25 °C
EINECS: 216-408-9
Product Categories: SULFONAMIDE
Canonical SMILES: C1=CC(=CC=C1O)S(=O)(=O)N
InChI: InChI=1S/C6H7NO3S/c7-11(9,10)6-3-1-5(8)2-4-6/h1-4,8H,(H2,7,9,10) 
InChIKey: DIRCLGLKRZLKHG-UHFFFAOYSA-N

Safty information about 4-Hydroxybenzenesulfonamide (CAS NO.1576-43-8) is:
Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36/37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection.

 4-Hydroxybenzenesulfonamide , its cas register number is 1576-43-8. It also can be called p-Hydroxybenzenesulfonamide ; p-Phenolsulfonamide ; p-Sulfamidophenol ; Benzenesulfonamide, 4-hydroxy- .