First image of the tested substance
First image of the tested substance
Second image of the tested substance
First image of the tested substance
Second image of the tested substance
Second image of the tested substance

Active ingredients and content

Hexahydrocannabinol (HHC)

Quantity not determinable


Quantity not determinable

Details of the substance tested


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Relevant substance(s)


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Risk assessment

Various cannabis oils declared as THC contained the semisynthetic cannabinoid hexahydrocannabinol (HHC) and/or delta 8-THC (∆8-THC) instead of THC.

Hexahydrocannabinol (HHC) is offered in some countries as a legal alternative to ∆9-THC products ("classic" THC). HHC is a THC derivative that occurs only in trace amounts in the cannabis plant. It is therefore primarily from THC (for example, from cannabis extracts), but can also be produced fully synthetically. According to user reports, a similar spectrum of effects as with ∆9-THC is reported, but in higher doses the substance is said to develop an effect that is perceived as unpleasant. Since many highly concentrated HHC products, such as vapes and e-liquids, are circulating on the market, the risk of overdose is high. In case of overdose, nausea, dizziness and vomiting may occur. Little is known about the risks and side effects of HHC, and there is no data at all on the long-term effects of consumption.

Delta 8-THC (∆8-THC) is a psychoactive cannabinoid that produces a similar intoxicating effect to delta 9-THC (the "classic" THC), but is less potent. It occurs naturally in the cannabis plant in very small amounts, if at all. In all likelihood, delta-8-THC is mainly a byproduct of the chemical conversion of CBD (cannabidiol) to delta-9-THC. It cannot be ruled out that the by-products formed during the conversion may be toxic. Since synthesis byproducts are often not completely separated by the manufacturers and are thus consumed together with delta-9-THC and delta-8-THC on cannabis products, an unknown health risk is taken when consuming them. No studies are available on the short- and long-term side effects of delta-8-THC.

More information about HHC can be found in our blog post at

Currently, there are various oils and liquids in circulation that are sold declared as THC, but contain synthetic cannabinoids, HHC or Delta 8-THC. Also oils and liquids must be analyzed before consumption!

Alert level

Safer Use


With newly purchased, unfamiliar cannabis products, it is advisable to test only a small amount the first time (take two or three puffs) and then wait about 15 minutes for the effect to develop. If the effect is unusual, do not continue to use the product!

Mixed use

Avoid mixed use. Mixed use with other substances (including alcohol or medications) is very risky because of the unpredictable and still unknown interactions. Avoid mixed use with MAO inhibitors, opioids or tranquilizers.

Mix well

Mix your cannabis products well before consumption (ideally use a grinder) to avoid a high concentration of possible synthetic cannabinoids on individual flower parts. Particular care should be taken with residual material that has fallen off the outer parts of the flower, as this is often likely to contain a particularly high concentration of synthetic cannabinoids.

Similar warnings

There are no current warnings for this substance

Things to know