Indapyrophenidone is a synthetic compound categorized within the cathinone class, and it has been made available for purchase online as a designer drug.
This substance is characterized as the indanyl-α-phenyl analogue of the stimulant drug α-PVP. Furthermore, it shares structural similarities with diarylethylamines like fluorolintane and UWA-001. Despite its usage, the precise mechanism of action of Indapyrophenidone remains unknown.

IUPAC name
CAS Number2055940-97-9
PubChem CID129844581
Chemical and physical data
Molar mass305.421 g·mol−1

Legal status

Legal status
Legal statusDE: NpSG (Industrial and scientific use only) UK: Under Psychoactive Substances Act


1. What is Indapyrophenidone?

  • Indapyrophenidone is a synthetic compound belonging to the cathinone class. It has been sold online as a designer drug.

2. How does Indapyrophenidone compare to α-PVP?

  • Indapyrophenidone is described as the indanyl-α-phenyl analogue of the stimulant drug α-PVP. This means it shares certain structural features with α-PVP.

3. Are there any structural similarities between Indapyrophenidone and other substances?

  • Indapyrophenidone is also structurally related to diarylethylamines, including compounds like fluorolintane and UWA-001.

4. What is the known mechanism of action for Indapyrophenidone?

  • The precise mechanism of action for Indapyrophenidone remains unknown. Further research is needed to understand how it affects the body.

5. Is Indapyrophenidone legal and regulated?

  • The legal status of Indapyrophenidone can vary by country and region. It’s important to check local laws and regulations regarding its possession, sale, or use, as it may be subject to legal restrictions in different jurisdictions.

6. What are the potential risks and side effects associated with Indapyrophenidone use?

  • Information about the effects and risks of Indapyrophenidone may be limited. Like any designer drug or stimulant, it may have potential health risks and side effects. It is crucial to exercise caution and seek reliable information.


  1. In January 2016, Bijlsma L, Miserez B, Ibáñez M, and their team identified and characterized a novel cathinone derivative known as “1-(2,3-dihydro-1H-inden-5-yl)-2-phenyl-2-(pyrrolidin-1-yl)-ethanone.” This compound was seized by customs in Jersey and their findings were published in “Forensic Toxicology,” Volume 34 (1), pages 144–150, with a DOI of 10.1007/s11419-015-0299-0.
  2. Information about “1-(2,3-Dihydro-1H-inden-5-yl)-2-phenyl-2-(pyrrolidinyl-1-yl)ethan-1-one” can be accessed through the New Synthetic Drugs Database, as of September 20, 2018.
  3. The Hungarian resource “Drog Fókuszpont” featured information in a PDF newsletter (in Hungarian) in 2015. It was last accessed on March 22, 2015, and provides insights into relevant topics.

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