So after doing some digging around I discovered that the active

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So after doing some digging around I discovered that the active chemical behind Zerust and other VCI products is sodium nitrite.

Sodium nitrite is cheap and is commonly used in the food industry as a curing agent.

Zerust uses sodium nitrite blended into some sort of plastic. I'm not a chemist. If I had just stuck a small cloth bag full of sodium nitrite in my tool box shelves and gun safe, would it vaporize on its own and keep my tools and guns protected? Or does it need some sort of catalyst so that it releases whatever it releases into the immediate environment? Thanks in advance.