The (S)-(+)-5-(Hydroxymethyl)-2-pyrrolidinone p-toluenesulfonate, with the CAS registry number 51693-17-5, has the systematic name of [(2S)-5-oxopyrrolidin-2-yl]methyl 4-methylbenzenesulfonate. It is a kind of colorless to beige powder, and belongs to the folllowing product categories: Chiral Building Blocks; Heterocyclic Building Blocks; Pyrrolidines. And the molecular formula of the chemical is C₁₂H₁₅NO₄S.

The characteristics of (S)-(+)-5-(Hydroxymethyl)-2-pyrrolidinone p-toluenesulfonate are as followings: (1)ACD/LogP: -0.48; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.47; (4)ACD/LogD (pH 7.4): -0.47; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 13.14; (8)ACD/KOC (pH 7.4): 13.14; (9)#H bond acceptors: 5; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 72.06 Å²; (13)Index of Refraction: 1.545; (14)Molar Refractivity: 66.79 cm³; (15)Molar Volume: 211.1 cm³; (16)Polarizability: 26.47×10^-24cm³; (17)Surface Tension: 44.1 dyne/cm; (18)Density: 1.275 g/cm³; (19)Flash Point: 259.1 °C; (20)Enthalpy of Vaporization: 77.43 kJ/mol; (21)Boiling Point: 504.8 °C at 760 mmHg; (22)Vapour Pressure: 2.58E-10 mmHg at 25°C.  

You should be cautious while dealing with this chemical. It irritates to eyes, respiratory system and skin. Therefore, you had better take the following instructions: Wear suitable protective clothing, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=S(=O)(OC[C@H]1NC(=O)CC1)c2ccc(cc2)C
(2)InChI: InChI=1/C12H15NO4S/c1-9-2-5-11(6-3-9)18(15,16)17-8-10-4-7-12(14)13-10/h2-3,5-6,10H,4,7-8H2,1H3,(H,13,14)/t10-/m0/s1
(3)InChIKey: AMZNHHZJURKRFX-JTQLQIEIBB