Blacklist

HA! We do not have a black list for ZINC, a list of compound vendors who have been difficult or unresponsive in the past. Instead, we simply remove these vendors from ZINC completely.

If you have trouble with a vendor, whether it is failure to deliver, failure to communicate in a timely fashion, or some other reason that makes you not want to do business with them, please write to use so that we use your feedback to make ZINC more useful.

Thank you