The 1-Naphthalenesulfonylchloride, 5-chloro-, with the CAS registry number 6291-07-2, is also known as 5-Chloronaphthalene-1-sulphonyl chloride. It belongs to the product categories of Aromatics Compounds; Aromatics; Sulfonyl Chlorides; Sulfur & Selenium Compounds. This chemical's molecular formula is C₁₀H₆Cl₂O₂S and molecular weight is 261.12. What's more, its systematic name is 5-chloronaphthalene-1-sulfonyl chloride. 

Physical properties of 1-Naphthalenesulfonylchloride, 5-chloro- are: (1)ACD/LogP: 3.81; (2)# of Rule of 5 Violations: 0 ; (3)#H bond acceptors: 2; (4)#H bond donors: 0; (5)#Freely Rotating Bonds: 1; (6)Polar Surface Area: 42.52 Å²; (7)Index of Refraction: 1.649; (8)Molar Refractivity: 62.78 cm³; (9)Molar Volume: 172.1 cm³; (10)Polarizability: 24.89×10^-24cm³; (11)Surface Tension: 52.8 dyne/cm; (12)Density: 1.516 g/cm³; (13)Flash Point: 180.9 °C; (14)Enthalpy of Vaporization: 59.85 kJ/mol; (15)Boiling Point: 375.4 °C at 760 mmHg; (16)Vapour Pressure: 1.68E-05 mmHg at 25°C.

Uses of 1-Naphthalenesulfonylchloride, 5-chloro-: it can be used to produce 5-chloro-naphthalene-1-sulfonic acid [3-(1-methyl-piperidin-4-yl)-1H-indol-5-yl]-amide at the temperature of 20 °C. It will need solvent pyridine. The yield is about 59%.

You can still convert the following datas into molecular structure:
(1)SMILES: ClS(=O)(=O)c1cccc2c1cccc2Cl
(2)InChI: InChI=1S/C10H6Cl2O2S/c11-9-5-1-4-8-7(9)3-2-6-10(8)15(12,13)14/h1-6H
(3)InChIKey: ZELWQFZGPMGHRI-UHFFFAOYSA-N