Yes. Blasting abrasives with more than 1% free silica should not be used. OSHA has a page dedicated to silica sand on their website. You can see OSHA’s slilica webpage here. Below is a quote from an OSHA worker on their page.
“Exposure to silica can be deadly, and limiting that exposure is essential. Every year, many exposed workers not only lose their ability to work, but also to breathe. This proposal is expected to prevent thousands of deaths from silicosis – an incurable and progressive disease – as well as lung cancer, other respiratory diseases, and kidney disease. Workers affected by silica are fathers, mothers, sisters and brothers lost to entirely preventable illnesses. We’re looking forward to public comment on the proposal.”
– Dr. David Michaels Assistant Secretary of Labor for Occupational Safety and Health
All of the abrasives that Clemtex sells contain less than 1% free silica. See them on the abrasives section of our website.