It's Nitrite you're looking for, not Nitrate. NaNO2, not NaNO3.
As for other similar compounds, Sodium Azude, Sodium Cianate or Potassium Cianate do exist, but they each act and are found differently.
As for the effects, I really do encourage you read all there is on the PPH about the inorganic salts. Really good and informative read.