I too did some research a while back on flame retardants. Everyone freaks out when they hear the word silica used anywhere in a mattress.
This article speaks to a lot of it, including Visil. Which is actually a registered name brand. Like kleenex for a tissue.
I wrote about hydrated silica on a different forum a while ago. People get needless obsessed about hydrated silica amongst other things. I know this thread was not about hydrated silica specifically, but hydrated silica is mentioned a lot in FR conversations in addition to other “silica” derivative products are not harmful as some seem to think.
I mentioned to one group of folks that if they are that worried about hydrated silica, then stop brushing your teeth. As it is the “abrasive” ingredient in tooth paste they put directly in their mouth every day, sometimes up to 3 times a day!
This in no way midigates the risks of a genuine fiberglass exposure issue or the experience of one.
Just another reference to distinguish between harmful and harmless chemistry that Phoenix referenced at the beginning of this thread and Basilio mentioned above.