Δ8-tetrahydrocannabinol is an isomer of Δ9 THC — same molecular formula (C₂₁H₃₀O₂), different arrangement of a double bond. Δ8 binds to CB1 receptors with lower affinity than Δ9, producing qualitatively similar but typically weaker psychoactive effects. Users often describe Δ8 as producing a clearer-headed, less-anxiety-prone high compared to Δ9 — though individual responses vary significantly. Δ8 occurs naturally in cannabis but only in very small quantities; most commercial Δ8 products are made by converting CBD to Δ8 through an acid-catalyzed reaction. Δ8's legal status is contested. Post-2018 Farm Bill, Δ8 derived from hemp CBD was initially sold as federally legal. The DEA's Interim Final Rule (2020) and subsequent state actions have restricted Δ8 in many states. As of 2026, Δ8 is banned or restricted in 20+ states.
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