The (S)-1,2-Butanediol, with the CAS registry number 73522-17-5, is also known as 1,2-Butanediol, (2S)-. This chemical's molecular formula is C₄H₁₀O₂ and molecular weight is 90.12. What's more, its systematic name is called (2S)-Butane-1,2-diol. 

Physical properties about this chemical are: (1) ACD/LogP: -0.81; (2) # of Rule of 5 Violations: 0; (3) #H bond acceptors: 2; (4) #H bond donors: 2; (5) #Freely Rotating Bonds: 4; (6) Polar Surface Area: 18.46 Å²; (7) Index of Refraction: 1.437; (8) Molar Refractivity: 23.6 cm³; (9) Molar Volume: 89.9 cm³; (10) Surface Tension: 37.1 dyne/cm; (11) Density: 1.001 g/cm³; (12) Flash Point: 93.3 °C; (13) Enthalpy of Vaporization: 49.64 kJ/mol; (14) Boiling Point: 190.3 °C at 760 mmHg; (15) Vapour Pressure: 0.148 mmHg at 25 °C.

Preparation of (S)-1,2-Butanediol: this chemical is prepared by reaction of 1,2-Diacetoxy-butane.

The reaction occurs with reagent Methanol, CHCl₃ and at ambient temperature for 120 hours. The yield is 53%.

Uses of (S)-1,2-Butanediol: it is used to produce other chemicals. For example, it is used to produce 1,1'-Oxybisbutan-2-ol.

This reaction needs reagent Na at ambient temperature. The reaction time is 16 hours. The yield is 60%.

You can still convert the following datas into molecular structure:
(1) SMILES: O[C@@H](CC)CO
(2) InChI: InChI=1/C4H10O2/c1-2-4(6)3-5/h4-6H,2-3H2,1H3/t4-/m0/s1
(3) InChIKey: BMRWNKZVCUKKSR-BYPYZUCNBC