The Benzenesulfonamide,N-methyl-, with the CAS registry number 5183-78-8 and EINECS registry number 225-965-7, has the systematic name of N-methylbenzenesulfonamide. And the molecular formula of the chemical is C₇H₉NO₂S. What's more, while dealing with this chemical, you should not breathe dust and then try to avoid contacting with skin and eyes.

The characteristics of Benzenesulfonamide,N-methyl- are as followings: (1)ACD/LogP: 0.97; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 0.97; (4)ACD/LogD (pH 7.4): 0.97; (5)ACD/BCF (pH 5.5): 3.23; (6)ACD/BCF (pH 7.4): 3.23; (7)ACD/KOC (pH 5.5): 80.53; (8)ACD/KOC (pH 7.4): 80.52; (9)#H bond acceptors: 3; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 45.76 Å²; (13)Index of Refraction: 1.538; (14)Molar Refractivity: 43.84 cm³; (15)Molar Volume: 140 cm³; (16)Polarizability: 17.38×10^-24cm³; (17)Surface Tension: 39.7 dyne/cm; (18)Density: 1.222 g/cm³; (19)Flash Point: 125.6 °C; (20)Enthalpy of Vaporization: 52.3 kJ/mol; (21)Boiling Point: 284 °C at 760 mmHg; (22)Vapour Pressure: 0.00305 mmHg at 25°C.

Preparation of Benzenesulfonamide,N-methyl-: This chemical can be prepared by benzenesulfonyl chloride and methylamine. The reaction will need reagent H₂O. The reaction time is 15 minutes with heating, and the yield is about 93%. 

Uses of Benzenesulfonamide,N-methyl-: It can react with benzotriazol-1-yl-methanol to produce N-benzotriazol-1-ylmethyl-N-methyl-benzenesulfonamide. This reaction will need reagent p-toluenesulfonic acid, and the menstruum toluene. The reaction time is 16 hours with heating, and the yield is about 94%.   

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=S(=O)(NC)c1ccccc1
(2)InChI: InChI=1/C7H9NO2S/c1-8-11(9,10)7-5-3-2-4-6-7/h2-6,8H,1H3
(3)InChIKey: SVDVKEBISAOWJT-UHFFFAOYAD