SnCl2
Stannous Chloride
Bio:  a.k.a. Tin Chloride, a hard worker, known since ancient times, currently employed in food packaging industry, recyclable; fluoride form prevents tooth decay; somewhat acidic personality; unfortunate confrontation with ÒLe PewÓ. 
Note:  Stannous Chloride was
prepared in 1 M HCl, so it will
appear quite acidic.