The Molecular Structure of 1,3-Butanediol,2-amino-, (2R,3R)-  (CAS NO.3228-51-1):

Empirical Formula: C₄H₁₁NO₂
Molecular Weight: 105.1356 
IUPAC Name: (2R,3R)-2-aminobutane-1,3-diol
Product Categories: Amino Alcohols;Amino alcohols
Appearance: white crystalline solid
Appearance:  Nominal Mass: 105 Da
Average Mass: 105.1356 Da
Monoisotopic Mass: 105.078979 Da 
Index of Refraction: 1.488
Molar Refractivity: 27.1 cm³
Molar Volume: 94 cm³
Surface Tension: 48.8 dyne/cm
Density: 1.118 g/cm³
Flash Point: 109.7 °C
Enthalpy of Vaporization: 57.54 kJ/mol
Boiling Point: 257.8 °C at 760 mmHg
Vapour Pressure: 0.00212 mmHg at 25°C 
Storage temp: −20°C
Water Solubility: Soluble

Hazard Codes: Xi
Risk Statements: 36/37/38 
R36/37/38: Irritating to eyes, respiratory system and skin
Safety Statements: 26-37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S37/39: Wear suitable gloves and eye/face protection
WGK Germany: 3
F: 3-10 
F3: Hygroscopic
F10: Keep under argon

 1,3-Butanediol,2-amino-, (2R,3R)-  (CAS NO.3228-51-1) is also called as L-Threoninol ; (2S,3S)-2-Amino-1,3-butanediol ; L(+)-threoninol;l-threoninol ; h-thr-ol ; H-l-thr-ol ; (2R,3R)-2-amino-1,3-butanediol ; (2S,3R)-2-amino-3-hydroxy-1-butanol ; Threoninol ; H-threoninol .