Alum is a spice for food.
spice section in the food store
Assuming you mean common ones, like the alum available as a cooking spice, potassium alum, then yes. I don't know about the exotic ones like rubidium alum.
There are better products for cold sores than alum. However, you can buy alum in the spice department in most grocery stores.
In Dallas, Texas, you can buy alum at local grocery stores such as Walmart or Whole Foods, where it is often found in the spice or baking section. Additionally, specialty spice shops or health food stores may carry it. If you prefer online shopping, retailers like Amazon also offer alum for delivery.
Alum refers to a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated aluminum potassium sulfate with the formula KAl(SO4)2.12H2O.
In Toronto, you can buy alum at various locations, including health food stores, spice shops, and some large supermarkets. Stores like Bulk Barn and health-focused retailers often carry it in their spice or baking sections. Additionally, you can find alum online through retailers like Amazon or specialty baking supply websites.
Not at all. It is edible as it is just a regular spice.
Alum typically is found in the spice section, and will be packaged like other spices. It is white, so might look like very fine salt.
At any grocery store usually in the spice section because it is mostly sold in powder form.
I'd check out the spice section of a grocery store (alum is used for some pickling brines), or you could try a drug store. If you can get non-finely powdered alum, you can pulverize it to a fine powder yourself using a mortal and pestle.
Cilantro would make a better flavor Harmony. In my 30 yrs of preparing and selling my own salsa varieties, Alum has never been in my ingredient list.