This chemical is called 2-Pyridinesulfonic acid, 3-hydroxy-, and its systematic name is 3-Hydroxypyridine-2-sulfonic acid. With the molecular formula of C₅H₅NO₄S, its molecular weight is 175.16. The CAS registry number of this chemical is 88511-41-5. Additionally, its product category is Pyridines.

Other characteristics of the 2-Pyridinesulfonic acid, 3-hydroxy- can be summarised as followings: (1)ACD/LogP: -0.21; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -3.71; (4)ACD/LogD (pH 7.4): -3.83; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 1; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 5; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 2; (12)Polar Surface Area: 73.87 Å²; (13)Index of Refraction: 1.618; (14)Molar Refractivity: 36.42 cm³; (15)Molar Volume: 103.8 cm³; (16)Polarizability: 14.44×10^-24cm³; (17)Surface Tension: 80.4 dyne/cm; (18)Density: 1.686 g/cm³.

You can still convert the following datas into molecular structure: 
1.SMILES: O=S(=O)(O)c1ncccc1O
2.InChI: InChI=1/C5H5NO4S/c7-4-2-1-3-6-5(4)11(8,9)10/h1-3,7H,(H,8,9,10) InChIKey:
VDVDJLFEYRUBGM-UHFFFAOYAK