It is recommended that staff in certain industries should refrain from using hand sanitisers containing alcohol. As alcohol is a fire risk, people who work near flames or sparks should avoid using hand sanitisers that contain alcohol. For example kitchens with hot furnaces and naked flames are a risk. Likewise, some types of manufacturing including foundries, welding and cutting could be potentially dangerous to staff. Electricians who may be around sparks may also want to reconsider using them.
Staff who use these type of hand sanitisers should wait until it completely evaporates off the skin. Better still, use soap and water for at least 20 seconds before working in these areas.
If you are in doubt check it out with your Health & Safety Officer or whoever is responsible for risk assessments.