Nitrosonium tetrafluoroborate
（重定向自Nitrosyl tetrafluoroborate）
![](/Images/godic/202501/29/Nitrosonium-tetrafluoroborate-2D1133.png")
Nitrosonium tetrafluoroborate, also called nitrosyl tetrafluoroborate, is a chemical compound with the chemical formula NOBF4. This colourless solid finds use in organic synthesis as a nitrosating agent.
NOBF4 is the nitrosonium salt of fluoroboric acid, and is composed of a nitrosonium cation, [NO], and a tetrafluoroborate anion, [BF4].