Clinical data
ATC code
  • none
Legal status
Legal status
  • DE: NpSG (Industrial and scientific use only)
  • UK: Class A
  • N-ethyl-N-[2-(1H-indol-3-yl)ethyl]propan-2-amine
CAS Number
Chemical and physical data
Molar mass230.355 g·mol−1
3D model (JSmol)
Melting point71 to 73 °C (160 to 163 °F)
  • CCN(C(C)C)CCc1c[nH]c2ccccc12
  • InChI=1S/C15H22N2/c1-4-17(12(2)3)10-9-13-11-16-15-8-6-5-7-14(13)15/h5-8,11-12,16H,4,9-10H2,1-3H3 checkY

EiPT is a chemical in the tryptamine family, and produces psychedelic and hallucinogenic effects. It was probably first synthesized by Alexander Shulgin.


EiPT is short for N-ethyl-N-isopropyl-tryptamine. The full chemical name of this structure is N-ethyl-N-[2-(1H-indol-3-yl)ethyl]propan-2-amine. EiPT is a tryptamine, which all belong to a larger family of compounds known as indolethylamines. EiPT is closely related to the compounds diethyltryptamine (DET) and DIPT.


In his book TiHKAL, Alexander Shulgin lists a dosage for EiPT as being 24-40 mg taken orally.


Very little is known about the psychopharmacological properties of EiPT, but reports suggest it produces psychedelic effects that can last 4–6 hours. According to Shulgin, this compound tends to produce nausea, dysphoria, and other unpleasant side-effects. It also lacks the hallucinatory and visual properties usually associated with psychedelic drugs.


There have been no reported deaths or hospitalizations from EiPT, but its safety profile is unknown.


EiPT is unscheduled and uncontrolled in the United States, but possession and sales of EiPT could be prosecuted under the Federal Analog Act because of its structural similarities to DET.

See also