how many days or uses can you get out of this small bottle?

I get about 35 uses. I usually put it on my area after I shampoo. I don't have to reapply until I wash it again. I wouldn't be without it! My bottle is .42 oz.

Ammonium chloride is an ingredient correct ? This is hazardous NO??

When used in this formulation, it is not hazardous. Sometimes Ammonium Chloride is actually given as a prescription for certain illnesses, so it all depends on how an ingredient is used. I would say this is safe in XFusion.

How accurate are the actual fiber colors in relation to the color chart included in the product images?

They blend in but you have to be careful not to over do it which I do when I am rushing

Says the product is by Toppik i dont get what the difference is?

XFusion is less expensive but still works great. I don’t notice any difference. I’m guessing it’s Toppik’s lower price line but I can’t figure it out either.