This chemical is called 2-Naphthalenesulfonic acid, 7-hydroxy-, and its systematic name is 7-hydroxynaphthalene-2-sulfonic acid. With the molecular formula of C₁₀H₈O₄S, its molecular weight is 224.23. The CAS registry number of this chemical is 92-40-0.

Other characteristics of the 2-Naphthalenesulfonic acid, 7-hydroxy- can be summarised as followings: (1)ACD/LogP: 0.96; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -2.53; (4)ACD/LogD (pH 7.4): -2.54; (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: 4; (10)#H bond donors: 2; (11)#Freely Rotating Bonds: 2; (12)Polar Surface Area: 60.98 Å²; (13)Index of Refraction: 1.703; (14)Molar Refractivity: 56.18 cm³; (15)Molar Volume: 144.7 cm³; (16)Polarizability: 22.27×10^-24cm³; (17)Surface Tension: 71.1 dyne/cm; (18)Density: 1.549 g/cm³.

You can still convert the following datas into molecular structure: 
1.SMILES: O=S(=O)(O)c1cc2c(cc1)ccc(O)c2
2.InChI: InChI=1/C10H8O4S/c11-9-3-1-7-2-4-10(15(12,13)14)6-8(7)5-9/h1-6,11H,(H,12,13,14)
3.InChIKey: MVEOHWRUBFWKJY-UHFFFAOYAP