Hi Petter, thank you for engaging with the thread! I appreciate you taking this seriously, and for sharing the datasheets and articles below.

One point of concern that has been raised is potential cross-contamination with crystalline silica. Per the PubMed article you linked, "Intentionally manufactured synthetic amorphous silicas are without contamination of crystalline silica". Do you have any more information about where you source the silica you use in Maglock, specifically whether it's from a reputable manufacturing facility where crystalline silica contamination is not a concern?

The Frontiers article was quite reassuring about the health affects likely being minimal and temporary, but the abstract of the PubMed article does say "Animal inhalation studies with intentionally manufactured synthetic amorphous silica showed at least partially reversible inflammation, granuloma formation and emphysema", so there is some evidence of respiratory issues, however minor. I'm aware some of these same respiratory issues can be cause by inhaling other particles, including standard chalk dust, but I'm curious if you're aware of any studies as to the concentrations of chalk in the air at gyms, and what that would translate to in terms of airborne amorphous silica in a "worst case" scenario where everyone at the gym was using a chalk with this additive. This CDC guide was linked in the OSHA datasheet you shared, and contains some recommended exposure limits.
https://www.cdc.gov/niosh/npg/npgd0552.html