Buy Metonitazene Online | What is Metonitazene?
What is the single most important fact about Metonitazene? It is an exceptionally potent synthetic opioid, estimated to be up to 1000 times stronger than morphine, carrying an extreme risk of respiratory depression and fatal overdose even in minuscule amounts . At Chem14.com, we supply this compound strictly for forensic and analytical research purposes, not for human consumption.
Metonitazene is a potent synthetic opioid from the nitazene class, approximately 100 times stronger than morphine via central administration and linked to severe risks including fatal respiratory depression.
🧪 What is Metonitazene? Definition, CAS Number, and Chemical Profile
Metonitazene is a synthetic opioid belonging to the 2-benzylbenzimidazole class, commonly known as nitazenes. Its full IUPAC name is N,N-diethyl-2-[2-[(4-methoxyphenyl)methyl]-5-nitrobenzimidazol-1-yl]ethanamine . You can identify it by its unique Chemical Abstracts Service number, CAS 14680-51-4 . The molecular formula is C21H26N4O3, with a molecular weight of approximately 382.5 g/mol .
Originally synthesized in the late 1950s by the Swiss pharmaceutical company CIBA (now Novartis), it was part of a broader effort to develop novel analgesics. Despite demonstrating profound analgesic effects, it was never approved for medical use due to unacceptable side effects, namely its high potential for abuse and severe respiratory depression. Today, it has re-emerged as a novel synthetic opioid (NSO) of significant concern to public health and forensic science.
How Does Metonitazene Work? Mechanism of Action ⚙️
Metonitazene binds to mu-opioid receptors as a full agonist. This triggers analgesia, euphoria, and sedation. It activates G-protein pathways, inhibits adenylyl cyclase, and modulates ion channels, leading to reduced neuronal excitability.
Animal data show it suppresses withdrawal and boosts dopamine in reward areas. Its potency exceeds many traditional opioids, raising concerns in toxicology reports. Sources like forensic analyses highlight its role in polysubstance cases.
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Chemical and Pharmacological Profile of Metonitazene
The chemical profile features a benzimidazole core, contributing to its high potency and long duration of action.
The IUPAC name for Metonitazene is 1-(2-(methylamino)ethyl)-2-(4-ethoxybenzyl)-5-nitro-1H-benzimidazole. This complex structure suggests a high affinity for biological targets. Below is a detailed breakdown of its chemical properties.
| Property | Details |
|---|---|
| Chemical Class | Benzimidazole Opioid (Nitazene) |
| Molecular Formula | C19H22N4O3 |
| Molecular Weight | 354.4 g/mol |
| IUPAC Name | 1-(2-(methylamino)ethyl)-2-(4-ethoxybenzyl)-5-nitro-1H-benzimidazole |
| Solubility | Soluble in organic solvents (e.g., DMSO, ethanol) |
| Storage | Cool, dry place, away from light |
Our product listings ensure researchers have access to precise chemical data. When you decide to buy research chemicals online, accurate specifications are vital for experimental success. The presence of the nitro group on the benzimidazole ring is a key structural feature that differentiates it from older opioid classes.
How Does Metonitazene Work? Mechanism of Action Explained
Metonitazene functions by binding to and activating the μ-opioid receptor, a G protein-coupled receptor primarily located in the brain and spinal cord. This activation triggers a cascade of intracellular events, including the inhibition of adenylyl cyclase and a subsequent decrease in cyclic adenosine monophosphate (cAMP) .
In vitro studies have quantified this interaction with startling results:
- Binding Affinity (Kᵢ): Metonitazene displays an exceptionally high affinity for the MOR, with values as low as 0.22–0.23 nM in rat and human receptor models. For context, this affinity is significantly higher than that of many reference opioids .
- Functional Potency (EC₅₀): It activates the receptor with an EC₅₀ value of 10.0–19.1 nM in standard functional assays like [³⁵S]GTPγS binding. This confirms its role as a full agonist with efficacy comparable to the potent peptide DAMGO .
In essence, Metonitazene locks onto opioid receptors with a grip far tighter than morphine and triggers the full spectrum of opioid effects, including the dangerous respiratory depression that makes it so deadly.
Comparative Potency: Metonitazene vs. Fentanyl vs. Morphine
To contextualize the extreme danger of this compound, we can compare its potency to better-known opioids. The table below summarizes data from pharmacological studies .
| Compound | Relative Potency (vs. Morphine) | μ-Opioid Receptor Binding Affinity (Kᵢ, nM) | Key Characteristics |
|---|---|---|---|
| Metonitazene | ~100 – 1000x | 0.22 – 0.23 | Potent MOR agonist; discovered in 2020 post-mortem cases. |
| Fentanyl | 50 – 100x | ~6.16 | Widely used medically; high abuse potential. |
| Morphine | 1x (Baseline) | ~1.0+ | Standard for analgesic comparison. |
| Isotonitazene | ~500x | 0.06 – 0.49 | Closely related nitazene analogue; internationally scheduled. |
| Etonitazene | ~1000 – 1500x | – | The original, most potent nitazene from CIBA research. |
This data illustrates that Metonitazene is not just a marginal increase in potency; it represents a significant leap, placing it in the same lethal category as the most potent synthetic opioids ever created . The margin between an effective dose and a lethal one is frighteningly small.
Side Effects and Risks: Why Is Metonitazene So Dangerous?
The extreme potency of Metonitazene translates directly into extreme danger. Its pharmacological profile, while fascinating for research, has dire consequences outside of a controlled lab.
- Profound Respiratory Depression: This is the primary cause of death in opioid overdoses. Due to its high efficacy at the MOR, Metonitazene can cause a complete cessation of breathing very rapidly, often before a user even realizes they are in danger .
- Unknown and Inconsistent Dosing: As an illicitly manufactured substance, the purity and concentration of Metonitazene found on the street are highly variable. Users who intend to take one drug may unknowingly consume a fatal dose of this nitazene .
- Naloxone (Narcan) Efficacy: Naloxone, the opioid overdose reversal drug, can reverse a Metonitazene overdose by displacing it from the receptor . However, due to the compound’s high potency and strong receptor binding, multiple doses of naloxone may be required to revive an individual . First responders and bystanders must be prepared to administer several doses and provide respiratory support.
- Rapid Onset: Reports suggest a rapid onset of effects, leaving a very narrow window for intervention in the event of an overdose .
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Where is Metonitazene Legal? Legal Status in the UK, USA, Germany, and Australia
Given its extreme risks, Metonitazene is under strict control in most jurisdictions. Researchers must verify their local laws before attempting to buy Metonitazene online.
| Country | Legal Status | Key Details / Legislation |
|---|---|---|
| United States | Schedule I | Controlled as a Schedule I substance, meaning it has no accepted medical use and a high potential for abuse . |
| United Kingdom | Class A (Analogue) | Controlled under the Psychoactive Substances Act 2016 as a potent synthetic opioid . |
| Germany | Controlled (Anlage I/II) | Listed under the New Psychoactive Substances Act (NpSG) or specific narcotics legislation . |
| Australia | Schedule 9 (Prohibited) | Classified as a prohibited substance; possession and import are illegal without a specific license . |
| Sweden | Illegal | Explicitly classified as an illegal substance . |
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Table: Metonitazene Key Facts Comparison
| Property | Details | Comparison to Morphine | Comparison to Fentanyl |
|---|---|---|---|
| CAS Number | 14680-51-4 | N/A | N/A |
| Chemical Formula | C21H26N4O3 | C17H19NO3 | C22H28N2O |
| Potency (central) | ~100x morphine | Baseline | Similar or greater |
| Potency (oral) | ~10x morphine | Baseline | Varies |
| Mechanism | Mu-opioid agonist | Mu-opioid agonist | Mu-opioid agonist |
| Common Risks | Respiratory depression, overdose | Similar but less potent | Similar potency risks |
| Legal (UK/USA) | Class A / Schedule I | Controlled | Schedule II |
| Blood Conc. (forensic) | Avg. 6.3 ng/mL (postmortem) | Higher typical | Low ng/mL range |
Data drawn from forensic and pharmacological sources.
“Metonitazene’s potency demands extreme caution in research settings.” – Forensic toxicology review.
What is the CAS number for Metonitazene?
The correct Chemical Abstracts Service number for Metonitazene is 14680-51-4 . This is essential for accurate chemical identification and ordering.
How strong is Metonitazene compared to fentanyl?
Pharmacological evidence suggests Metonitazene can be equipotent to or even more potent than fentanyl, with estimates ranging from 30 to 200 times stronger than morphine . Some sources indicate it can be up to 1000 times more potent than morphine by certain routes of administration .
Can naloxone reverse a Metonitazene overdose?
Yes, naloxone (Narcan) is effective at reversing Metonitazene’s effects as it is an opioid antagonist . However, due to the drug’s extreme potency and strong receptor binding, multiple doses are very likely needed. Emergency medical attention is critical even if the person seems to recover .
Is it legal to buy Metonitazene in the UK?
For human consumption, no. In the UK, synthetic opioids like Metonitazene are controlled as Class A drugs under the Psychoactive Substances Act . Licensed laboratories may be able to purchase it as a reference standard for forensic research, provided all regulations are met. Chem14.com sells strictly for research purposes.
Why was Metonitazene developed if it’s so dangerous?
It was originally synthesized by CIBA in the 1950s during a research program aimed at discovering new painkillers . While it showed powerful analgesic effects, its development was halted due to the severe side effects, including a high potential for addiction and fatal respiratory depression, making it unsuitable for use as a medicine .
How should Metonitazene be stored in a laboratory?
To maintain stability and purity, store Metonitazene in a cool, dry place, ideally at -20°C, away from direct light . It should be kept in a tightly sealed container, and all handling should occur in a fume hood with appropriate personal protective equipment (PPE).
What are the primary metabolites of Metonitazene?
Research indicates that Metonitazene undergoes metabolism to form several key metabolites, including N-desethyl metonitazene (via N-dealkylation) and 5-amino metonitazene (via reduction of the nitro group) . These are important targets for analytical detection in biological samples.
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What is Metonitazene?
Metonitazene is a synthetic benzimidazole opioid, ~100x more potent than morphine centrally, used in research for its mu-opioid effects.
How potent is Metonitazene compared to fentanyl?
Studies indicate Metonitazene has similar or greater potency than fentanyl, with high mu-receptor affinity.
Is Metonitazene legal in the UK or USA?
No, it is Class A in the UK and Schedule I in the USA, prohibiting non-research possession.
What are Metonitazene side effects?
Effects include euphoria and analgesia, but risks involve vomiting, sedation, and fatal respiratory depression.
Where can I buy Metonitazene online safely?
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Can Metonitazene cause overdose?
Yes, due to extreme potency; low doses lead to respiratory depression and death in reported cases.
How does Metonitazene compare to other research opioids?
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