As far as I have searched there's nothing that mentions your concern especially about welfare checks. There's not many people from your region of the world on this site also, even using the search tab on here only showed one result:
I've been starting to get really desperate to CTB myself. Is there any reliable sources for SN to be shipped to the the Arab Gulf Region (Saudi Arabia, United Arab Emirates, Oman, Qatar)? I'm specifying that since Middle East is very broad.
sanctioned-suicide.net
Not much is mentioned in this thread besides one member stating it's easy to get by searching online.
I found this site which was one of the only search results when I searched "United Arab Emirates sodium nitrite":
Wholesalers, Manufacturers, Suppliers & Exporters find International Buyers and Importers everyday on this fastest growing Trade Portal and Online Directory. Start your Import & Export Business on the go4WorldBusiness.com B2B Marketplace.
www.go4worldbusiness.com
I don't know if this would be considered sourcing for me to post this since Idk if you can buy from them. But if you put in 'sodium nitrite' you'll get a small list of suppliers.
As for your concern for welfare checks, I'd suggest doing more research on your own before you decide on buying it.