Stannous (Tin) Fluoroborate, 50%, CAS 13814-97-6, (also known as stannous (tin) tetrafluoroborate or stannous (tin) fluoborate) has the formula Sn(BF4)2. Stannous (Tin) Fluoroborate is most widely used as an electrolyte in electroplating for tin and is also used with Lead Fluoroborate for Lead-Tin plating in PCB/Thin wall bearing.