Molasses

Because you can never be too careful handling such a dangerous substance, the good folk at Crosby Molasses have thoughtfully provided a Material Safety Data Sheet for molasses.

Would that one had been available at the time of the 1919 Boston Molasses Flood: people would not have had to die such a sticky, sweet death.

Molasses can be also be used as the fuel in ANFO, a fact that fortunately escaped the Toronto 17 jihadis. They might have started buying the stuff in bulk. And then you'd never be able to buy molasses without a permit.