How to find purity of SN if not mentioned in website

[AltF4Mylife]

I just wanted to buy sn from online. I found a website but I can't find the purity details anywhere it just says Sodium Nitrite Extra Pure

 

[nobodycaresaboutme]

It seems most of "extra pure" SN products are 98+% pure. Is there something to read for more information in the page like product images?

 

[antiqueantipodean]

Using the word "extra" seems a bit sus… is it a reputable business domestically for you or DW?
If it's not too expensive and you're not too worried about getting it shipped if it's not pure enough just buy it and aquarium/blood test it

 

[locked*n*loaded]

Only way is to buy it and send a sample to an independent lab for analysis.