What Is Delta-9 THC?

Delta-9 tetrahydrocannabinol. The cannabinoid federal hemp law is written around.

Measured across 164 lab-tested products from 28 independent laboratories · updated September 3, 2026

The chemistry

Delta-9 THC is what THCA becomes after decarboxylation. It is the compound named in the 2018 Farm Bill definition of hemp, which set a ceiling of 0.3% by dry weight.

Why it matters when you are reading a label

Every compliance question in US hemp ultimately resolves to a Delta-9 or Total THC number. It is the figure to read first on any certificate.

Products highest in Delta-9 THC

Ranked by measured Delta-9 THC content, not by price or popularity. The figure on each card is the one printed on that product’s certificate.

Delta-9 THC 4.399% Koi THC Disposable Vape, cherry gelato, Sativa - 5g (Live Re... Tested by ACS Laboratory $64.14 $77.28

Delta-9 THC 4.352% Koi THC Disposable Vape, Watermelon Skitz, Hybrid - 5g (Live... Tested by ACS Laboratory $64.14 $77.28

Delta-9 THC 4.326% Koi THC Disposable Vape, Blackberry Kush, Indica - 5g (Live... Tested by ACS Laboratory $64.14 $77.28

Delta-9 THC 0.298% nama Extra Strength Sleep Drops with Delta-9 THC and CBD, TH... Tested by ACS Laboratory $49.00

Delta-9 THC 0.298% nama Extra Strength Sleep Drops with Delta-9 THC and CBD, TH... Tested by ACS Laboratory $89.00

Delta-9 THC 0.294% Koi THCA Flower Platinum Tier - Candy Cartel - Indica 3.5g Tested by FESA Labs $41.49 $49.99

Delta-9 THC 0.29% Tillmans Tranquils Strawberry Lemonade THC Gummies, 15mg CBD... Tested by Accurate Test Labs $29.87 $35.99

Delta-9 THC 0.29% Tillmans Tranquils Pineaaple Express Gummies - Sativa - 20 C... Tested by Accurate Test Labs $29.87 $35.99

A product can appear high here and low elsewhere — these are single-cannabinoid rankings, not overall potency.

How to read a Delta-9 THC figure

Percentage is content by weight. Milligrams per serving is the more useful number for edibles and beverages, because it tells you the dose rather than the concentration. Where both appear on a certificate they should reconcile: percentage multiplied by ten gives milligrams per gram.

If a label claims a Delta-9 THC figure the certificate does not support, trust the certificate.

Delta-9 THC compared

Common questions

What is Delta-9 THC?

Delta-9 tetrahydrocannabinol. The cannabinoid federal hemp law is written around.

How is Delta-9 THC formed?

Delta-9 THC is what THCA becomes after decarboxylation. It is the compound named in the 2018 Farm Bill definition of hemp, which set a ceiling of 0.3% by dry weight.

How much Delta-9 THC is in a typical hemp product?

Across 164 lab-tested products in this catalogue, Delta-9 THC ranged from 0.001% to 4.399%, averaging 0.239%. Those results come from 28 independent laboratories. Product form drives most of that spread.

How do I verify the Delta-9 THC content of a product?

Read the certificate of analysis and match its batch number to the packaging. A certificate that cannot be tied to the batch in your hand does not describe the product you bought.

Chemistry and measured content only. No health outcome is claimed or implied, and nothing here is medical advice.