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THIS IS ALL MY OPINION BASED ON MY EXPERIENCE, NOT SCIENTIFIC FACT! THIS IS NOT MEDICAL ADVICE!

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D9 THC-C8

(Delta 9 THC-octyl) 
(Octyl D9 THC)

D9 THC-C8

(Delta 9 THC-octyl) 
(Octyl D9 THC)

Structure of D9 THC-C8
Effects (Community)
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Effects
  • Euphoric

  • Heavy Sedation

  • Very Heavy Body High

  • Couch Lock

  • Slight Loss Of Balance

  • Headband Effect

  • Tactile Sensations on The Arms and Face

Average High Length

Vaped

Come-up: 45-70 Minutes

Peak: 2-6 Hours

Comedown: 4-6 Hours

Afterglow: 6-12 Hours

Eaten

Come-up: 1-2 Hours

Peak: 2-8 Hours

Comedown: 4-10 Hours

Afterglow: 6-12 Hours

Dosage Sizes
(Low-Mid Tolerance)

It should be noted that stronger cannabinoids like THC-C8 are better enjoyed in a blend. I don't recommend vaping them raw other than once or twice for curiosities sake.

Vaped

Threshold: 2-3mg

Low dose: 3-10mg

Avg dose: 10-25mg

Strong dose: 25mg+

Eaten

Threshold: 0.5-2mg

Low dose: 2-5mg

Avg dose: 5-10mg

Strong dose: 10mg+

Dosage Sizes
(Mid-High Tolerance)​

Vaped

Threshold: 4-8mg

Low dose: 8-20mg

Avg dose: 20-35mg

Strong dose: 35mg+

Eaten

Threshold: 2-5mg

Low dose: 5-10mg

Avg dose: 10-25mg

Strong dose: 25mg+

Best known for:

Hazy and sedating properties.

Viscosity 

THC-C8 has a mild viscosity. It can be pushed out of a syringe at room temperature, but not easily. 

My Opinion

​THC-C8 is an intensely stoney and hazy cannabinoid, rivaled only in its ability to lower my eyes and glue me in one spot by HHC-P and HHCPo. The come-up begins with my eyes being forcefully squinted and a feeling of sedation creeping in, which builds into a more and more intense high. The signature of THC-C8 is seemingly its tactile nature as the headband effect is very pronounced and even got so intense on a high dose that it began to feel uncomfortable. It's also common that my arms get heavy and have a "fuzzy" feeling like TV static. The sedation with THC-C8 seems to be quite strong, especially when eaten - I had to drink a coffee in order to stay awake the first time I took it for review. The sedation stuck around longer than any of the other effects.

THC-C8 is quite impressive when it comes to it's strength - in my opinion, it's stronger than everything but the phorols, and even then it might be stronger than THC-P. You certainly need to be careful with dosing on this cannabinoid, especially when it comes to edibles.

 

It takes a while for THC-C8 to fully take hold but once it does it has a fairly long duration, leaving me still at a 4/10 high with 25mg vaped 6 hours prior.

In the flavor department it falls short but not unusably so - it tastes very chemical-y with notes of rubber and hay. It is seemingly not harsh at all, feeling more like an acetate on the throat than anything else. 

 

Other notes:

N/A

Let the community know what you think about this cannabinoid!
Comments (8)

pharmdude
Dec 19, 2025

swisstargets predicted this to have binding with translocator protein on mitochondria (iirc) and if true, would up your neurosteroid production, making this have potentially lasting gabaergic effects. (The slow rate of their production would make this not addictive like benzos as the time between ingestion and their peak is long)


this stuff made me feel higher the day after. What stoners think happens with stuff like this and THCP, is it takes a while to come up bc its so long lasting, but inhalation is more like IV where you peak very quickly. So for my grogginess and fog to increase morning after tells me something is up. THCP doesn't do this to me, might wake up with it still in system, but doesnt feel like i was given a diazepam in my sleep. I had to run quick predictions on C8 as it was relaxing but more sedating than every other noid and its not even close.

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Bálint Nagy
Bálint Nagy
Nov 20, 2024

Its JWH-138, Also in Europe they sell it as THC-JD. Dont make that fact bother you though, its not like most JWH analogues! Its weaker and much closer to weed than lets say JWH-018. I would agree with everything Turkey wrote, except I think it does have quite a bit of stimulation too.

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2151c
Mar 09, 2025
Replying to

D8 vs D9 makes a lot of difference, as at the end of the day, it's not as simple as "D9 > D8", "THC > HHC", etc. The most potent synthetic cannabinoid ever found was a D8 derivative, not a D9 one.

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GGs
Mar 11, 2025
Replying to

If all you know about a compound is that it's a "JWH," you know almost nothing about the drug's safety or worth. It's a broad "category"

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PLEASE NOTE THAT CANNABINOID USAGE CAN BE HAZARDOUS FOR YOUR HEALTH.

THIS IS ALL MY OPINION BASED ON MY EXPERIENCE, NOT SCIENTIFIC FACT! THIS IS NOT MEDICAL ADVICE!

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