That looks like a particular brand of a particular type of foaming isopropyl hand sanitizer, in Canada. I would assume using a different type is more effective than using nothing! Also, I don't think trace amounts of isopropyl will harm snakes other than drying them out superficially. Just don't use it directly on them and I think it's ok (please correct me if I am wrong!)
I use sanitizer in between handling snakes and thoroughly wash my hands after. I am the type who would be peeved if I was handling snakes and then washed my hands over dirty dishes in the sink...never know what will flourish in some old spaghetti. I am a semi-germophobe.