What is the difference between Sodium Nitrate and NaNH3

I have almost no experience in chemistry so please excuse my ignorance. I am looking to purchase some Sodium Nitrate but the vendor I am dealing with has the chemical formula NaNH3 listed beside the Sodium Nitrate they sell. Just wondering what the difference is?

• are you sure it's not NaNO3? – costrom Nov 18 '16 at 18:40
• Maybe NaNH2 sodamide not NaNH3? But a simple typo as @costrom suggests NaNO3 makes more sense – Leeser Nov 18 '16 at 18:43
• Heres this listing I have. glengarrycheesemaking.on.ca/rennet-and-ingredients/ingredients/… – Tom Nov 18 '16 at 18:44
• So If I am understanding correctly, there is no chemical with the formula NaNH3 ? And its more than likely a typo. – Tom Nov 18 '16 at 18:47
• Correct there is no such chemical as $\ce{NaNH3}$. A typo on the webpage is the only thing that makes sense. Since this is from website for making cheese, I doubt that there is much chemistry knowledge there. – MaxW Nov 18 '16 at 18:49

$\ce{NaNO3}$ (which we established is the de-typo’d version of what your source calls $\ce{NaNH3}$) is simply the chemical formula of sodium nitrate.
It looks like this is just a typo on the part of the web developer. There is no such thing as $\ce{NaNH3}$. They probably meant to type $\ce{NaNO3}$.