Thimerosal (sometimes spelled as Thimerosol) is a commonly-used preservative, used primarily in children'svaccinations. It contains 49.6% mercury. It has been in use since the 1930s.
Thimerosal has been named by critics as being a contributing factor in the onset of autism.
"First Coast News has obtained non-published documents that show the CDC [had] data supporting such a link" between thimerosal and developmental problems like autism in 2000
