Molecular Structure of (S)-4-Boc-Piperazine-3-carboxylic acid (CAS NO.159532-59-9):

Empirical Formula: C₁₀H₁₈N₂O₄ 
Molecular Weight: 230.2609 
Index of Refraction:  1.495 
Surface Tension:  44.1 dyne/cm 
Density:  1.193 g/cm³ 
Flash Point:  178.6 °C 
Enthalpy of Vaporization:  67.96 kJ/mol 
Boiling Point:  371.8 °C at 760 mmHg 
Vapour Pressure:  1.5E-06 mmHg at 25°C 

Hazard Codes Xi
Risk Statements 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.

 (S)-4-Boc-Piperazine-3-carboxylic acid,its cas register number is 159532-59-9. It also can be called (S)-1-Boc-piperazine-2-carboxylic acid and S-4-Boc-Piperazine-3-carboxylicacid .