Hi, there, everything appears to be in order EXCEPT it has the incorrect Chemical Abstract Service (CAS) number. The number stated in the photograph is hydrogen chloride (HCl) and NOT sodium nitrite.
When HCl is dissolved in water, it forms hydrochloric acid which is not only toxic but also highly corrosive. Depending on the concentration, swallowing hydrochloric acid will burn through your esophagus (throat) and result in internal bleeding.
Based on what you have provided, the product appears to have a false label. If the product is indeed HCl, dosing would be extremely painful and will cause irreparable harm done. A legitimate product would never have the incorrect CAS number. PLEASE proceed with utmost caution. At the very least, have the product tested for legitimacy.