Molecular Structure of Carbonic acid sodiumsalt (1:2), hydrate (1:1) (CAS NO.5968-11-6):

IUPAC Name: disodium carbonate hydrate 
Empirical Formula: CH₂Na₂O₄
Molecular Weight: 124.0037
H bond acceptors: 3
H bond donors: 2
Freely Rotating Bonds: 0
Polar Surface Area: 57.53 Å²
Flash Point: 169.8 °C
Density: 2.53g/cm³
Enthalpy of Vaporization: 63.37 kJ/mol
Boiling Point: 333.6 °C at 760 mmHg
Vapour Pressure: 2.58E-05 mmHg at 25°C
Melting point: 851 °C(lit.)
Storage temp: Store at RT
Solubility: H₂O: 1 M at 20 °C
Merck: 14,8596
 InChI
InChI=1/CH2O3.2Na.H2O/c2-1(3)4;;;/h(H2,2,3,4);;;1H2/q;2*+1;/p-2
Smiles
C(O[Na])(O[Na])=O.O
Stability: Stable. Incompatible with strong acids, aluminium, fluorine, lithium, phosphorus oxides
EINECS: 207-838-8
Product Categories: Inorganic & organic chemicals; Inorganic Chemicals; ACS GradeChemical Synthesis; Essential Chemicals; Inorganic Bases; Routine Reagents; Synthetic Reagents

Hazard Codes: Xi
Risk Statements: 36
R36:Irritating to eyes.
Safety Statements: 26
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
WGK Germany: 1
RTECS: VZ4050000
F: 3

  Carbonic acid sodiumsalt (1:2), hydrate (1:1) , with CAS number of 5968-11-6, can be called carbonic acid, sodium salt, hydrate (1:2:1) ; Disodium carbonate monohydrate ; Sodium carbonate monohydrate ; Sodium carbonate hydrate (2:1:1) . It is a white powder.