Though it is considered to be a mild contact irritant, the risk should be minimal as long as they're not eating it or inhaling the dust from it when they're sniffing. I'd probably wipe off their paws just to be on the safe side.
If you know the brand used, it should be possible to find the MSDS (Material Safety Data Sheet) online for more detailed information.
If you know the brand used, it should be possible to find the MSDS (Material Safety Data Sheet) online for more detailed information.