Molecular Structure of Hexanoic anhydride (CAS NO.2051-49-2):

IUPAC Name: Hexanoyl hexanoate 
Molecular Formula: C₁₂H₂₂O₃
Molecular Weight: 214.30
EINECS: 218-121-4
Melting Point: -40 °C 
Index of Refraction: 1.436
Molar Refractivity: 59.44 cm³
Molar Volume: 227.2 cm³
Surface Tension: 31.7 dyne/cm
Density: 0.943 g/cm³
Flash Point: 116.6 °C
Enthalpy of Vaporization: 48.41 kJ/mol
Boiling Point: 247 °C at 760 mmHg
Vapour Pressure: 0.0263 mmHg at 25 °C
Sensitive: Moisture Sensitive
Product Categories: Pharmaceutical Intermediates
Appearance: clear colorless to light yellow liquid
Canonical SMILES: CCCCCC(=O)OC(=O)CCCCC
InChI: InChI=1S/C12H22O3/c1-3-5-7-9-11(13)15-12(14)10-8-6-4-2/h3-10H2,1-2H3
InChIKey: PKHMTIRCAFTBDS-UHFFFAOYSA-N

Safety Information of Hexanoic anhydride (CAS NO.2051-49-2):
Hazard Codes: C
Risk Statements: 34 
R34:Causes burns.
Safety Statements: 26-36/37/39-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 3265 8/PG 2
WGK Germany: 3
HazardClass: 8
PackingGroup: III

 Hexanoic anhydride (CAS NO.2051-49-2), its Synonyms are Hexanoic acid, 1,1'-anhydride ; Hexanoic acid, anhydride ; Caproic acid anhydride ; Caproic anhydride ; Capronic acid anhydride ; Capronic anhydride ; Hexanoyl anhydride .