Method Is it AR sodium nitrite OR CP sodium nitrite?

[Insomniac]

I keep seeing this and I don't know what AR and CP mean

 

[Circles]

I keep seeing this and I don't know what AR and CP mean

Here's a link to a similar thread:

https://sanctioned-suicide.net/threads/sodium-nitrite-ar-500g-vs-sodium-nitrite-cp-500g.77374/

The member motel rooms posted this:

AR (Analytical Reagent) grade = suitable for laboratory and general use
CP (Chemically Pure) grade = suitable for general use

From Stan's Guide:
"Food grade versus Laboratory grade
Depending on availability, both food grade and laboratory grade are acceptable as long as the purity is > 95%"