4-Pro-MET Drops

Buy 4-Pro-MET Drops at 4promet

Looking to buy 4-Pro-MET Drops without taking a leap of faith? Understandable. Our drops are made for people who want to know exactly what they’re getting: 99%+ purity, HPLC-tested, certificate available online. No marketing fluff – just verifiable numbers. Each drop contains exactly 1 mg 4-Pro-MET, dissolved in pharmaceutical-grade propylene glycol (Ph. Eur.).

Why 4-Pro-MET Drops for Research?

Short answer: because drops let you dose with a precision that pellets simply can’t match. That sounds straightforward, but it’s a major advantage. Pellets deliver fixed units – great for standard protocols. But for pharmacokinetic time series, microdosing, or anything requiring flexible amounts, research chemical drops are simply more practical. One drop = 1 mg. Two drops = 2 mg. No splitting, no calculating, no scale.

This makes particular sense for microdosing drops: 1–3 drops are enough for sub-perceptual doses, as currently investigated in research. Pellets last longer, sure – but you’re locked into a fixed dose. Drops give you full control.

Why Order Here?

We do one thing, and we do it properly: high-purity tryptamine research chemicals. When you order 4-Pro-MET drops, you get HPLC-tested 99%+ purity, complete batch tracking and EU shipping within 48 hours. Free from €50. Each bottle: 3 ml, 30 drops at 1 mg each.

If drops aren’t your thing: we also carry macrodosing pellets, microdosing pellets and 4-Pro-MET bundles. All HPLC-tested, all with certificate of analysis.

What Are 4-Pro-MET Drops?

In concrete terms: a liquid solution of the synthetic tryptamine 4-Propionoxy-N-methyl-N-ethyltryptamine (4-Pro-MET) in pharmaceutical-grade propylene glycol. Filled into amber glass bottles with a calibrated dropper insert, 1 mg per drop. Unpack, drop, research – no scale, no preparation.

Chemical Classification of 4-Pro-MET

4-Pro-MET belongs to the 4-substituted tryptamines. IUPAC name: 3-[2-(Ethyl(methyl)amino)ethyl]-1H-indol-4-yl propanoate. Molecular formula: C₁₅H₂₀N₂O₂, molar mass 274.36 g/mol. The basic scaffold is an indole with a propionyloxy group at position 4 and an N-methyl-N-ethyl side chain. So much for the dry chemistry.

4-Pro-MET as a Prodrug of 4-HO-MET

This is where it gets interesting: 4-Pro-MET itself is not the active player. In the organism, esterases cleave the propionyl group – leaving 4-HO-MET (Metocin), the pharmacologically active metabolite. You might know the principle from psilocybin: that’s also a prodrug, converted to psilocin (4-HO-DMT) in the body. Same logic, different molecule.

Classification Within the Tryptamine Class

Within the legal tryptamine drops family, 4-Pro-MET sits alongside 4-AcO-MET and 4-AcO-DMT. The difference? The ester group. Acetoxy prodrugs (4-AcO-) have an acetic acid group with 2 carbons, while 4-Pro-MET carries a propionic acid group with 3 carbons. Why does that matter? Because the ester chain length can influence the rate of hydrolysis – and thus how quickly the onset occurs. This is currently being actively researched.

Volumetric Dosing with 4-Pro-MET Drops

This is the main reason researchers choose drops over powder or pellets: volumetric dosing. At 1 mg per drop, you set the desired 4-Pro-MET dosage simply by counting. Microdosing (1–3 mg)? One to three drops. Standard dosing (10–25 mg)? Ten to twenty-five drops. For even greater accuracy, add a microliter pipette.

Stability and Proper Storage

Dissolved in propylene glycol, the drops stay stable for at least 6 months – provided you store them correctly. The amber glass bottle blocks UV radiation, which is already good. Ideal: refrigerator at 2–8 °C, dry, dark. After opening, you should use the solution within 3 months. Not because it goes bad, but because purity is best guaranteed that way.

Quality Assurance and Laboratory Analysis

When someone says “quality comes first,” it usually means nothing. So here are the facts: every batch undergoes HPLC-tested analysis. Below 99% purity? Not sold. The certificate of analysis shows purity, identity and batch number – fully traceable, all viewable online.

HPLC Analysis – How We Test

HPLC (High Performance Liquid Chromatography) is not a fancy buzzword but the gold standard in pharmaceutical analytics. The sample is chromatographically separated, and each component is quantified via UV detection. This measures not only the active substance content but also specifically screens for impurities and by-products.

For selected batches, GC-MS (Gas Chromatography-Mass Spectrometry) is additionally employed. This provides molecular identity and a detailed impurity profile. Double-tested is better.

Complete Batch Tracking

Every bottle of 4-Pro-MET drops has its own batch number. Why? Because reproducible science only works when you know exactly what you worked with. Via the batch number, you can retrieve the corresponding HPLC certificate at any time. Your results can thus be directly linked to a specific substance batch.

Optimal Storage and Shelf Life

Proper storage is not optional – it’s part of the quality chain. Incorrect storage can hydrolytically cleave the ester group. Concretely: the prodrug prematurely converts to 4-HO-MET, and your dosing is no longer accurate. You don’t want that.

Recommended Storage Conditions

Temperature: 2–8 °C in the refrigerator, room temperature under 25 °C as a fallback. Humidity: below 60%. Light protection: the amber glass bottle does its job, but a closed cabinet or box doesn’t hurt.

Shelf Life After Opening

Unopened and cool: at least 6 months from manufacture. Opened: 3 months with refrigerator storage. A practical tip: close the bottle immediately after each use, don’t touch the dropper insert with your fingers. Sounds basic, but it makes the difference between a clean sample and contamination.

Applications of 4-Pro-MET Drops in Research

In practice, the drops end up in quite different laboratories. As a prodrug of 4-HO-MET, 4-Pro-MET is relevant for pharmacological, analytical and neuroscientific studies – and the liquid form makes dosing significantly easier than with powder or pellets.

Receptor Binding at the 5-HT2A Receptor

The active metabolite 4-HO-MET binds strongly to the serotonin 5-HT_2A receptor in vitro – the primary target of classical psychedelics. Published EC₅₀ values are in the low nanomolar range (approx. 3–93 nM, depending on assay). For receptor binding studies, 4-Pro-MET drops online are practical because you can prepare exact concentrations without a scale. Count drops instead of weighing – saves time and reduces error sources.

And it doesn’t stop at 5-HT_2A: 4-HO-MET also interacts with 5-HT_2C, 5-HT_1A and other serotonin receptor subtypes. The broad profile makes the substance particularly useful for comparative tryptamine studies.

Pharmacokinetic Studies

The prodrug property makes 4-Pro-MET a fascinating candidate for pharmacokinetic questions: How quickly is the propionyl group cleaved? Does the ester chain length change bioavailability? Is the onset different from acetoxy analogues? With precisely dosed research chemical drops, such questions can be systematically addressed – without dosing becoming an uncertainty factor.

Microdosing Research with 4-Pro-MET

For microdosing protocols, the microdosing drops are essentially ideal. Why? Because 1–3 drops deliver exactly 1–3 mg, reproducibly, without special equipment. Current research is investigating how sub-perceptual tryptamine doses affect cognitive flexibility, mood regulation and neuroplasticity. Exciting stuff.

More on microdosing research at our microdosing pellets page and in the research blog.

Analytical Reference Standards

The drops are also used in forensic and toxicological laboratories – as reference material. Anyone looking to identify and quantify new substances needs reliable standards. At 1 mg/drop, diluted calibration solutions for HPLC, GC-MS or LC-MS/MS can be prepared quickly and reproducibly.

Order 4-Pro-MET Drops – Easy and Discreet

Looking to order 4-Pro-MET drops? No registration marathon, no hidden costs. Select your product, add to cart, done. Your package is discreetly packaged and usually arrives faster than you’d expect.

Fast Ordering Process

Three steps: choose product, cart, complete order. Orders placed before 2:00 PM ship the same business day. No ifs, ands, or buts.

Flexible Payment Options

We currently offer bank transfer (SEPA) and other secure payment methods. All transactions are encrypted – your data stays your data.

Discreet EU Shipping in 48 Hours

Neutral package, no indication of contents. Delivery time within the EU: typically 24–48 hours. Free shipping on orders over €50. You’ll receive tracking by email as soon as the package is on its way.