What is Delta 8 THC? It’s not marijuana, but it is creating a buzz in New York state Updated May 10, 2021; Facebook Share Have you heard of, or perhaps even tried, Delta 8 THC? It’s not exactly marijuana. It’s not exactly CBD, either. Both of those cannabis products are now legal in New York — CBD derived from hemp for the past few years and marijuana since last month. Delta 8 THC, also called just Delta 8 or simply D8, is a hemp-cannabis derivative that has been available in New York for about a year. It exists on the border between marijuana, which gives users a psychoactive “high,” and hemp-based CBD, which does not.