Rather than an outright ban on trioxane, It just has to be considered hazardous material. If the shipping restrictions are upheld, the triox will be priced out of the market. Are you willing to order triox & pay a $20 hazmat fee?
This is info from the Firequest site:
"The Department of Transportation (DOT) requires a $20.00 handling charge for each package containing Hazardous Materials. Hazardous Materials cannot be mixed, therefore if you order two DIFFERENT items marked with Hazardous Material Shipping, they will be shipped in two separate packages with a $20.00 Hazardous Material handling charge for each."