Up to half of the fentanyl sold on Philly's streets incorporates an industrial chemical that’s utilized in plastic production. According to our testing of fentanyl samples, this is applicable in November 2024, which were collected in Kensington in Philadelphia and are regarded as those The largest marketplace for open-air medicines on the east coast.
In addition, the quantity or concentration of this industrial chemical within the drug samples often exceeded the quantity of fentanyl.
We are one Epidemiologist And anthropologist Their research focuses on substance disorders and opioid overdose epidemic. The results of our team were published in February 2025 within the Peer review journal of the American Medical Association.
The industrial chemical that now we have found is known as BTMPS, the abbreviation for Bisbacat (2.2.6,6-tetramethyl-4-piperidyl). BTMPS belongs to a category of molecules which might be called Disabled aminated light stilizers The manufacturers often contribute to plastic and other polymers to guard themselves from worsening heat and sunlight.
Since March 2024, our team has tested 228 street fentanyl samples in Kensington. Of these contained 39 – or 17% – BTMPS.
We found BTMPS for the primary time in Philadelphia in June 2024. We found it in two of the eight samples – 25% – that we collected this month. By November 2024, 12 out of twenty-two samples – or 55% – BTMPS.
Why BTMPS is added to the Street Opioid supply and through which phase in production or distribution you might be added stays unknown.
Researchers suspect that it could possibly be added to stabilize A Fentanyl precipitation chemical This is at risk of worsening heat and oxygen.
Due to its low costs, BTMPs can be added to dilute other psychoactive substances or costlier ingredients or each.

Spencer Platt over Getty Images
How toxic is BTMPS?
Among the 39 samples contained BTMPS in Philadelphia, the typical amount of BTMPs was almost twice as high as for fentanyl. On average, BTMPS made up 4% of the sample, while Fentanyl killed 2.3% of the sample. In a tested sample, BTMPS made 18% of the rehearsal.
BTMPS was not approved for human consumption or examined in humans.
However was shown in rat studies To Reduce nicotine consumption and weakening withdrawal symptoms in reference to morphine And cocaine.
The rat studies showed several disadvantageous health effects from exposure to BTMPS. This includes Heart defectPresent Serious eye damage and death.
These findings are concerned concerning the increasing exposure of BTMPS towards people through street medication. The concentrations of as much as 18% within the Philly samples are many orders of magnitude higher than the estimated concentration of 0.1% to 0.5% that individuals are exposed to through plastic products.

Joe Lamberti for the Washington Post about Getty Images
BtMPS appear in Fentanyl within the USA
Our colleagues who test street opioid samples in other regions BtMPS also recognized In fentanyl samples or utensil residues in Delaware, Maryland, Nevada, Washington and California. BTMPS was first demonstrated in July 2024 in Los Angeles – 56% of the rehearsals there contained it there by September.
The sudden and almost simultaneous appearance of a brand new adultery in opioids of the US road from the East coast to the west coast is rare. For example, fentanyl, xylazine and medetomidine were distributed within the US opioid supply in numerous regions at different times.
The latest emergence of BTMPS on Street opioid markets nationwide suggests that it could possibly enter the offer at an early stage of production or wholesale sales.
Historically, Philadelphia Street Opioid Supply had Strong relationships with Puerto Rico. These bonds influenced Phillys early Inclusion of the veterinary sedative -Xylazine In the road pressure. Xylazine has been available since 2021 Practically the complete street Fentanyl from Philly.
In view of those associations, we also test the Street Opioid supply in Puerto Rico to look at potential similarities and relationships with the care of Philadelphia. So far now we have demonstrated BTMPS in two out of 49 – or 4% – street opioid samples in Puerto Rico. We found it again for the primary time in a sample in September 2024 and in December 2024.
What's next
We proceed to observe the BTMPS trends in Philadelphia's Street Fentanyl. We also investigate whether fentanyl concentrations and other key connections reminiscent of Xylazine have modified in Philly's street ferrice stanyl Agency of the overdose mortality rate in Pennsylvania and other parts of the United States
We also develop plans to look at the immediate and long-term effects that BTMPS exposure has applied to individuals with medicinal products.
image credit : theconversation.com
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