Safety with our product is important.
The small bag with the Silver nitrate crystals are a VERY strong oxidiser. It can stain anything it touches including your skin and eyes. ALWAYS USE PPE such as safety glasses, nitrile gloves and a mask when mixing and using our kits. Also please use on an expendable surface - as the tiniest Silver Nitrate crystal can leave a permanent dark brown stain.
Here are links to the MSDS For these chemicals.
http://www.labchem.com/tools/msds/msds/LC22500.pdf - Silver Nitrate - Tiny Bags of Crystals - Black or Smokey clored bags in our kits.
https://www.labchem.com/tools/msds/msds/LC24990.pdf - Sodium Thiosulfate - Larger Bags of Crystals. Comes in clear bag in all kits.