Product Name: Diethyl sulfite (CAS NO.623-81-4)

Molecular Formula: C₄H₁₀O₃S
Molecular Weight: 138.19g/mol
Mol File: 623-81-4.mol
Einecs: 210-815-5
Appearance: Clear colorless solution
Boiling point: 156.6 °C at 760 mmHg
Storage Temperature: Flammables area
Flash Point: 53.9 °C
Density: 1.077 g/mL at 25 °C(lit.)
Refractive index: n20/D 1.414(lit.)
Surface Tension: 44.4 dyne/cm
Enthalpy of Vaporization: 37.71 kJ/mol
Vapour Pressure: 3.71 mmHg at 25°C
XLogP3-AA: 0.9
H-Bond Donor: 0
H-Bond Acceptor: 3
Product Categories: Organic Building Blocks; Organic Sulfates/Sulfites; Sulfur Compounds

Reported in EPA TSCA Inventory.

Low toxicity by inhalation. Reaction with chlorine fluoride gives the violently explosive ethyl fluorosulfate. When heated to decomposition it emits toxic fumes of SO_x. See also SULFITES.
Safety Information of Diethyl sulfite (CAS NO.623-81-4):
Hazard Codes: Xi
Risk Statements: 10-36/37/38 
10:  Flammable
36:  Irritating to the eyes 
37:  Irritating to the respiratory system 
38:  Irritating to the skin 
Safety Statements: 26-36-24/25-16
16:  Keep away from sources of ignition - No smoking
24:  Avoid contact with skin 
25:  Avoid contact with eyes 
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:  Wear suitable protective clothing

 Diethyl sulfite ,its CAS NO. is 623-81-4,the synonyms is Ethyl sulfite;diethyl sulfite ; Sulfurous acid diethyl ester ; Diethyl ester of sulfurous acid ; Diethyl sulphite ; Ethyl sulfite, (et2so3) ; Ethylethylsulfonate .