Can I check if my WHMIS is expired?

There is no "central WHMIS registry" as there is for drivers licenses. And there is no present expiry date for WHMIS like there is for a certificate for Transportation of Dangerous Goods which is valid for three years from the date of issue.

A good guideline to use is ask yourself if it has been more than one year since you completed WHMIS training and testing?

If it has someone may question whether your WHMIS knowledge is up to date of how well you would be able to recall important information about WHMIS hazard classes, and how well you would be able to read a WHMIS label or Safety Data Sheet.