Difficult question!
First of all, hand sanitizers are not very common here in Spain. For some reason, we don’t use them. So if I wanted to talk about them with somebody from my country, I’d have to explain first what they are.
After saying that, if I had to give it a name in Spanish I’d say “desinfectante de manos” or “gel desinfectante”. That’s the best I can do. I hope somebody can give a more accurate translation.