Sodium Syanide - Where Do You Even Get Sodium Sinide?

Sodium syanide was used with water to clean heavy tarnishing off sterling silver. It also dissolved gold for gold plated jewellry, slash electro stripping gold jewellery. My family and i were talking about true crime, specifically someone being poisoned,. And my dad mentioned that he worked with sodium syanide at the shop. I wasn't surprised, because there was a bottle with a skull on it that my dad said, don't touch that. So so i wasn't shocked that he used it in the business. Got it am while getting rid of a lot of supplies. One supply he was trying to sell to a jeweller was his s ide pillows. While trying