Just an FYI for those of us who don’t know that acronym: MSDS stands for Material Safety Data Sheet. In other words its the technical document that commercial material suppliers have detailing the (potential) health effects of exposure to chemicals and how to use the material safely.
If you are using a found man-made object (lets say an LP record, because its been discussed here before), then you want to google the heck out of it before putting it into your GF.
Even natural objects may be dangerous. There’s been a bit of discussion about wool felt, which apparently produces cyanide if burned in large oxygen reduction environments. Yikes!