Looks ok to me. In any event, you want blue bags of any salt, don't use green, yellow, anything with iron out, etc.
As a general rule for chemicals/products your are consider, even beyond salt, you can, if you have the product name, search for "product name SDS" and get the ingredients. If they are "proprietary blend" avoid it.
Diamond Crystals Solar Naturals, and their Pool Salt tend to be really good (not contaminants) and are available at HD/Lowes. Avoid Morton and Clorox salt. Lots of reports of iron staining (contaminants).
www.troublefreepool.com