Help How to obtain Sodium nitrite (U.S.)?

[lapislazu]

Hi, I am a long-time lurker on this forum and a new user. I was wondering if there are any up to date resources on how to obtain SN in the United States? I can't seem to find any information on this. I feel like I'm going crazy, as I thought it would be easier to obtain. Would really appreciate it if someone could point me in the right direction. Thank you!!