What would cause me to be disqualified for the HazMat endorsement?
There are many things TSA may disqualify you for under federal laws.
What are the requirements for getting the HazMat endorsement?
To qualify, you will need to be a U.S. citizen or legal permanent resident of the U.S and present proof of your citizenship. You will also need to meet federal medical requirements in 49 CFR Part 391 and have a valid USDOT Medical Examiner's Certificate.