Following is the structure of 3-Hydroxy-4-iodobenzoic acid (CAS NO.58123-77-6):
                               
Empirical Formula: C₇H₅IO₃
Molecular Weight: 264.0173 g/mol
Sensitive: Light Sensitive
Index of Refraction: 1.712
Molar Refractivity: 47.97 cm³
Molar Volume: 122.4 cm³
Density: 2.155 g/cm³
Flash Point: 147.2 °C
Melting point: 225-229 °C
Surface Tension: 74.6 dyne/cm
Enthalpy of Vaporization: 59.27 kJ/mol
Boiling Point: 319.8 °C at 760 mmHg
Vapour Pressure of 3-Hydroxy-4-iodobenzoic acid (CAS NO.58123-77-6): 0.000138 mmHg at 25 °C
Product Categories of 3-Hydroxy-4-iodobenzoic acid (CAS NO.58123-77-6): C7; Carbonyl Compounds; Carboxylic Acids
SMILES: Ic1ccc(C(=O)O)cc1O
InChI: InChI=1/C7H5IO3/c8-5-2-1-4(7(10)11)3-6(5)9/h1-3,9H,(H,10,11)
InChIKey: UABBBWVTEWIIMN-UHFFFAOYAL

Hazard Codes: T,Xi
Risk Statements: 25-37/38-41-36/37/38 
R25 :Toxic if swallowed. 
R37/38:Irritating to respiratory system and skin. 
R41:Risk of serious damage to the eyes. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-37/39-45
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S37/39:Wear suitable gloves and eye/face protection.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 3
Hazard Note: Irritant

 3-Hydroxy-4-iodobenzoic acid , its cas register number is 58123-77-6. It also can be called 4-Iodo-3-Hydroxy benzoic acid ; Benzoic acid, 3-hydroxy-4-iodo- .