Sometimes I make my own silver nitrate. I dare say that H2SO4 is far more dangerous than the end product, as is the orange gass that is produced. Like many water soluble chemicals, silver nitrate is relatively harmless in its dry state. So is KCN. Just be careful with solutions. Silver miners used to get gray ireses and internal organs because of their in-the-field extraction practices. My eyes are still ther original color.