Molecular Structure of 1-N-Boc-3-Azetidinecarboxylic acid (CAS NO.142253-55-2):

IUPAC Name: 1-[(2-methylpropan-2-yl)oxycarbonyl]azetidine-3-carboxylic acid
Empirical Formula: C₉H₁₅NO₄
Molecular Weight: 201.2197
H bond acceptors: 5
H bond donors: 1
Freely Rotating Bonds: 3
Polar Surface Area: 55.84 Å²
Molar Refractivity: 48.32 cm³
Molar Volume: 161.4 cm³
Index of Refraction: 1.51
Surface Tension: 49.8 dyne/cm
Density: 1.246 g/cm³
Flash Point: 147.9 °C
Enthalpy of Vaporization: 61.87 kJ/mol
Boiling Point: 321 °C at 760 mmHg
Vapour Pressure: 6.35E-05 mmHg at 25°C
Melting Point: 100.1-101.9°C
Storage Temp: Store at -15°C
Chemical Properties: light yellow powder
Product Categories: Unusual amino acids; pharmacetical; Carboxylic Acids; Azetidine; Organic acids; Azetidines; Peptide; Carboxylic Acids; Ring Systems; Others; Peptide Synthesis; Unnatural Amino Acid Derivatives; B-Amino

Hazard Codes: Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 22-24/25-37-26
S22:Do not breathe dust. 
S24/25:Avoid contact with skin and eyes. 
S37:Wear suitable gloves. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
WGK Germany: 3
Hazard Note: Irritant
HazardClass: Irritant

 1-N-Boc-3-Azetidinecarboxylic acid , its cas register number is 142253-55-2. It also can be called n-boc-3-azetidine carboxylic acid ; n-boc-azetidine-3-carboxylic acid ; n-alpha-t-butoxycarbonyl-azetide-3-carboxylic acid ; n-alpha-t-butoxycarbonyl-azetidine-3-carboxylic acid ; n-alpha-t-boc-l-azetidine-3-carboxylic acid ; boc-aze(3)-oh ; boc-azetidine-3-carboxylic acid and so on.