HHC is legal in Indiana. According to state law, hemp products containing less than 0.3% THC are legal in Indiana. In this case, state law concurs with 2018 federal regulations.
Most US states don’t have any laws covering HHC. Despite this compound being around for decades, it seems lawmakers haven’t heard of it yet. Because of this, HHC is legal in most but not all US states. Here’s a snapshot of the current state of HHC legality in the United States.