IUPAC Name: 1,4-Oxathiane 4,4-dioxide
Synonyms: Oxathiane4,4-dioxide ; P-Thioxanesulfone ; Thioxanesulfone ; Usafdo-38 ; 1,4-Oxathiane 4,4-dioxide ; 1,4Lambda6-oxathiane-4,4-dione ; 1,4-Thioxane 1,1-dioxide ; 4,4-Dioxo-1,4-oxathiane
Molecular Structure:
Molecular Formula: C₄H₈O₃S
Molecular Weight : 136.17
CAS NO: 107-61-9
EINECS : 203-507-7
BRN : 110609
Mol File: 107-61-9.mol
Index of Refraction: 1.47
Surface Tension: 37.4 dyne/cm
Density: 1.308 g/cm³
Flash Point: 159.2 °C
Melting point 131-133 ºC
Enthalpy of Vaporization: 56.01 kJ/mol
Boiling Point: 339.7 °C at 760 mmHg
Vapour Pressure: 0.000178 mmHg at 25°C
Appearance: 4,4-Dioxide-1,4-oxathiane (CAS NO. 107-61-9) is white to almost white shiny crystalline powder.

Reported in EPA TSCA Inventory.

Poison by intraperitoneal route. When heated to decomposition it emits toxic fumes of SO_x.
Hazard Codes Xi
Risk Statements 36/37/38 
R36/37/38: 4,4-Dioxide-1,4-oxathiane (CAS NO. 107-61-9) is irritating to eyes, respiratory system and skin.
Safety Statements 24/25
S24/25:Avoid contact with skin and eyes.
RTECS RP4375000

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Extinguishing Media: Use agent most appropriate to extinguish fire. 
Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Storage: Store 4,4-Dioxide-1,4-oxathiane (CAS NO. 107-61-9) in a cool, dry place. Keep container closed when not in use.