Molecular Structure of D-Isoascorbic acid (CAS NO.89-65-6):

IUPAC Name: 2-(1,2-dihydroxyethyl)-4,5-dihydroxyfuran-3-one 
Empirical Formula: C₆H₈O₆
Molecular Weight: 176.1241
EINECS: 201-928-0
Melting point: 169-172 ^°C (dec.)(lit.)
Boiling Point: 552.7 °C at 760 mmHg 
Flash Point: 238.2 °C 
Index of Refraction: 1.711 
Molar Refractivity: 35.26 cm³ 
Molar Volume: 90.1 cm³ 
Polarizability: 13.97 10 ^-24 cm³ 
Surface Tension: 140.5 dyne/cm 
Density: 1.954 g/cm³ 
Enthalpy of Vaporization: 95.78 kJ/mol 
Vapour Pressure: 1.62E-14 mmHg at 25°C 
alpha: -17.25 ^o (c=10, H₂O 25 ^oC)
Storage temp: Store at 0-5^°C
Water Solubility: 1g/10mL 
Appearance: Crystalline
Merck: 14,5126
Stability: Stable. Combustible. Incompatible with chemically active metals, aluminium, zinc, copper, magnesium, strong bases, strong oxidizing agents. 
Product Categories: Food and Feed Additive; Sugar Acids; Vitamin Derivatives; Biochemistry;Sugars; Vitamins; Water Ttreatment Chemicals

Reported in EPA TSCA Inventory.

Mutation data reported. When heated to decomposition it emits acrid smoke and irritating vapors.
Hazard Codes of D-Isoascorbic acid (CAS NO.89-65-6):Xi
Risk Statements:
36/37/38:  Irritating to eyes, respiratory system and skin 
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
24/25:  Avoid contact with skin and eyes 
WGK Germany: 2
RTECS: KF3015000

  D-Isoascorbic acid , with CAS number of 89-65-6, can be called D-erythro-Hexonicacid, 3-keto-, g-lactone(6CI) ; Araboascorbic acid ; Araboascorbic acid, D- ; D-(-)-Isoascorbic acid ; D-Araboascorbic acid ; D-Erythorbic acid ; Glucosaccharonic acid ; Saccharosonic acid .