Yes, it is safe to vacuum baking soda. In fact, vacuuming up the baking soda is an essential part of the deodorizing process. After the baking soda has been left on the carpet for the desired amount of time to absorb any odors, it is important to thoroughly vacuum it up to remove it from the carpet fibers. When vacuuming up baking soda, make sure that your vacuum cleaner has a clean filter and a well-functioning motor. If the filter is clogged or the motor is not working properly, it can cause the vacuum to overheat and potentially start a fire. It is also a good idea to empty the vacuum canister or change the vacuum bag after vacuuming up the baking soda to ensure that any remaining residue is removed from the vacuum. In summary, vacuuming up baking soda is a safe and necessary step in the process of deodorizing your carpet. Just make sure to take the necessary precautions to ensure that your vacuum is working properly before using it to clean up the baking soda. If in doubt, you can always wear a face mask or ventilate the room as an added precaution.