819444
From Grand Rapids, Michigan on July 6, 2026
Assumed to be heroin, fentanyl
This is a messy brew of 7 major substances:
- erythritol
- caffeine
- diphenhydramine
- lidocaine
- 4-ANPP
- heroin
- fentanyl
But we found lots of contaminants too, with traces of quinine + 6-monoacetylmorphine (6-MAM) + acetylcodeine + ethyl 4-ANPP + tetramethyl-4-AP + tetramethylnorfentanyl + medetomidine. Trace substances in small quantities are usually harmless but can sometimes cause health problems. Unexpected sensations may be due to these. The trace designation indicates the conclusive identification of the substance at a relatively low abundance compared to the sample's primary component(s). A substance is designated as "trace" when the peak height is less than 5% of the height of the most abundant peak detected in the sample.
Fentanyl is potent and the amount changes by batch. If you weren't expecting it, consider getting test strips online or from a harm reduction program. Carry naloxone (Narcan) to reverse overdoses. Don't use alone so someone can help if you go out.
There are a lot of different substances in this sample. We don't know the harms that some of these can cause. Be careful and be prepared for unexpected reactions.
Looks = gray, unknown texture
Need free supplies and advice to keep you safe? Find your nearest harm reduction program at harmreduction.org
Major substances in graph:
Peak: 4.66 = erythritol
Peak: 6.97 = caffeine
Peak: 7.09 = diphenhydramine
Peak: 7.11 = lidocaine
Peak: 9.15 = 4-ANPP
Peak: 9.87 = heroin
Peak: 10.31 = fentanyl
Method(s): GCMS
Record for Sample 819444 last updated July 15, 2026