Banks and card brands (credit/debit) do not permit our industry. Some vendors have work-arounds for accepting cards “directly.” These systems are generally “transaction laundering” – subject to substantial fines/penalties, even for the customer who may be unknowingly participating in laundered transactions.
Cryptocurrency is the only sustainable, secure, middle-men free, and anonymous payment method for research chemicals. Debit cards can be used to purchase cryptocurrency (i.e. Bitcoin)