The Selenium fluoride(SeF₄), (T-4)- (9CI), with the CAS registry number of 13465-66-2, is also known as Tetrafluoridoselenium. Its EINECS registry number is 236-703-6. This chemical's molecular formula is F₄Se and molecular weight is 154.95. What's more, its systematic name is Tetrafluoro-λ⁴-selane. It is used as fluorinating agent. It can be obtained by Sulfur fluoride and SeO₂. The reaction time is 24 h with reaction temperature of 100-200 °C.

Physical properties about the Selenium fluoride(SeF4), (T-4)- (9CI) are: (1)#H bond acceptors: 0; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 0 Å².

When you are using this chemical, please be cautious about it as the following:
As a chemical, it is toxic by inhalation and if swallowed. It is very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. When using do not eat, drink or smoke. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1) SMILES: F[Se](F)(F)F
(2) InChI: InChI=1/F4Se/c1-5(2,3)4
(3) InChIKey: PMOBWAXBGUSOPS-UHFFFAOYAQ