Does potassium iodate (dissolved in water) have any WHMIS warnings tied to it?
Yes, as a matter of fact, it does. Workplace Hazardous Materials System has indeed issued a tag for potassium iodate. This product has a WHMIS classification of C, D2B.
Please refer here, for the complete viewsing : http://avogadro.chem.iastate.edu/MSDS/KIO3.htm