EPT fumarate (N-ethyl-N-propyltryptamine)
EPT fumarate (N-ethyl-N-propyltryptamine) Price range: €23.50 through €336.00
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MiPT fumarate (N-methyl-N-isopropyltryptamine)
MiPT fumarate (N-methyl-N-isopropyltryptamine) Price range: €23.50 through €336.00

WITH fumarate (N-methyl-N-ethyltryptamine)

WITH fumarate properties

Synonym: N-methyl-N-ethyltryptamine fumarate
CAS Number: 5599-69-9
Formula: 3-[2-(ethyl(methyl)amino)ethyl]-1H-indole fumarate
Molar Mass: 318.4 g/mol
Purity: >97%

Price range: €18.80 through €268.80

* The information on this page is a summary and is not intended to cover all available information about this medication. It does not cover all possible uses, directions, precautions, drug interactions or adverse effects and is not a substitute for the expertise and judgment of your healthcare professional.

MET Fumarate – N-methyl-N-ethyltryptamine Research Substance of Pharmaceutical Purity

Product name: WITH Fumarate
Full Chemical Name: N-methyl-N-ethyltryptamine (MET) Fumarate salt
Molecular Formula: C13H18N2 C4H4O4
Molecular Weight: 302.32 g/mol
Form: White crystalline powder
Purity: ≥98% (HPLC confirmed)
Application: For scientific research only
CAS number (free base): 61-50-7


What is MET Fumarate?

MET (N-methyl-N-ethyltryptamine) is a synthetic tryptamine compound which is structurally related to DMT and other serotonergic substances. The fumarate salt is chosen for increased stability, accurate dosing, and better solubility in laboratory conditions.

MET is known for its mild, short-lived psychoactive effects and is being studied in research contexts because of its rapid onset of action, low toxicity, and distinct tryptamine characteristics.


Applications in Research Institutions

  • Pharmacological research: Study of the interaction with 5-HT2A and 5-HT1A receptors.
  • Neurochemical comparative study: With other tryptamines such as DMT, DET and MiPT.
  • Prodrug or metabolism study: Evaluation of degradation products and receptor binding.
  • In vitro binding assays: Analysis of receptor selectivity at different concentrations.

⚠️ Not for human or animal consumption. For use in a controlled laboratory environment only.


Benefits of MET Fumarate for Scientific Use

✔ Rapid onset of action and short half-life – suitable for acute effects research
✔ High purity and stability in fumarate form
✔ Interesting pharmacological profile with relatively low toxicity
✔ Readily soluble in ethanol and other analytical solvents


Disadvantages / Possible Limitations

  • Short duration of action complicates long-term studies
  • Less researched than DMT or psilocin – limited literature
  • Sensitive to oxidation when exposed to oxygen and light
  • Legal ambiguity in some regions (analogy law)

Laboratory Analysis & Batch Data

FeatureSpecification
Purity≥98% (HPLC)
Physical formFine white powder
SolubilityGood in ethanol, acetone
Storage temperature2–8°C, light and airtight
Batch numberMET-FUM0625
Latest analysisJune 16, 2025
Melting point175–179 °C (fumarate)

Recommended Use Scenarios (Laboratory)

Usage typeConcentrationMethodObjective
In vitro1–25 µMDissolved in ethanol/DMSOReceptor binding studies
In vivo (animal model)Only by permitInjection or oral administrationKinetics and metabolism analysis

Frequently Asked Questions (FAQ)

❓ What is the difference between MET and DMT?

Although both belong to the tryptamine class, MET is slightly less potent than DMT and has a shorter and milder onset. MET is also less visual and more mental/cognitive focused.

❓ Why is fumarate form chosen?

The fumarate form increases chemical stability, facilitates dosing and extends shelf life compared to the free base.

❓ Is MET legal in the Netherlands or Belgium?

MET is not explicitly regulated in many countries, but may be subject to similar legislation. Always check the applicable regulations for your region.

❓ Can I use MET outside of a laboratory?

No. This product is intended for academic or forensic research only. Use outside laboratory conditions is prohibited.


Summary

WITH Fumarate offers researchers a unique opportunity to analyze a lesser-studied, synthetic tryptamine with distinct pharmacological properties. Due to its stable salt form, high purity, and mild action, this compound is ideal for comparative neurochemical and receptor studies.

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