Buy Protonitazene Online USA
Protonitazene, an opioid up to 100x stronger than heroin, is causing mass overdoses. This certified reference material is a potent μ-opioid agonist from the nitazene class, essential for studying novel synthetic opioid (NSO) pharmacology and toxicology. Sourced with verified purity for accurate lab results. Buy Protonitazene online USA from Chem14 for strict research use only. Discreet global shipping to the UK, Germany, and Australia.
What is Protonitazene?
Protonitazene is a synthetic opioid belonging to the nitazene (benzimidazole) family, first developed in the 1950s as a potential morphine alternative but abandoned due to safety concerns. It emerged on illicit markets around 2019 as a designer drug and has since been linked to numerous overdoses worldwide.
Protonitazene is a potent synthetic opioid from the nitazene class, acting as a full μ-opioid receptor agonist with an estimated potency up to 100 times greater than heroin and significantly higher than morphine, posing extreme risks of respiratory depression and fatal overdose .
This compound acts as a powerful μ-opioid receptor agonist, producing intense opioid-like effects even at tiny doses. Researchers note its subnanomolar potency, making it one of the strongest in its class. At Chem14.com, we provide Protonitazene exclusively for scientific study, never for human consumption.
What is the CAS number and chemical profile of Protonitazene?
Protonitazene carries CAS number 95958-84-2 (free base) or 119276-01-6 (hydrochloride salt). Its molecular formula is C23H30N4O3, with a molecular weight of 410.51 g/mol. The IUPAC name is N,N-diethyl-2-[5-nitro-2-[(4-propoxyphenyl)methyl]benzimidazol-1-yl]ethanamine.
Structurally, it features a benzimidazole core with a nitro group at position 5, a 4-propoxybenzyl substituent at position 2, and a diethylaminoethyl chain at position 1. This configuration contributes to its high binding affinity at opioid receptors. For detailed specs, check reliable sources like PubChem.
| Property | Details |
|---|---|
| Chemical Name (IUPAC) | N,N-diethyl-2-[5-nitro-2-[(4-propoxyphenyl)methyl]benzimidazol-1-yl]ethanamine |
| Common Names | Protonitazene, Pronitazene |
| CAS Number | 95958-84-2 |
| Molecular Formula | C₂₃H₃₀N₄O₃ |
| Molecular Weight | ~410.51 g/mol |
| Chemical Class | Benzimidazole Opioid (Nitazene) |
| Physical State | Off-white to light yellow powder |
| Solubility | Soluble in organic solvents (e.g., DMSO, methanol) |
| Storage Conditions | Store at -20°C, away from light, in a tightly sealed container |
How does Protonitazene work as a synthetic opioid?
Protonitazene functions primarily as a selective μ-opioid receptor agonist, with in vitro studies showing efficacy slightly above fentanyl (107-129%) and far greater than hydromorphone (174-365%). It triggers typical opioid responses like analgesia, sedation, and euphoria by activating these receptors in the brain.
Preclinical data from rodent models reveal antinociceptive potency equivalent to or exceeding fentanyl, roughly 130 times stronger than morphine. Effects reverse with antagonists like naltrexone, confirming μ-receptor mediation. See pharmacological details in WHO critical review reports.
Why is Protonitazene more potent than fentanyl?
Protonitazene often proves more potent than fentanyl in various assays, with estimates placing it 3 times stronger in some contexts and up to many times morphine’s strength. Its subnanomolar EC50 values (0.07–0.35 ng/mL) highlight extreme potency, leading to rapid onset of effects like respiratory depression.
This heightened strength explains frequent misdosing and overdoses when sold as other substances. Recent toxicology reviews confirm it induces opioid toxidrome at minuscule amounts. Explore more in PMC narrative review.
What are the side effects and risks of Protonitazene?
Protonitazene produces classic opioid effects: euphoria, relaxation, pain relief, sedation, drowsiness, nausea, vomiting, itching, and slowed breathing. Severe risks include profound respiratory depression, cyanosis, coma, and death – often requiring multiple naloxone doses.
Adverse events mirror other nitazenes, with narrow therapeutic windows. Human cases show opioid toxidrome, hypothermia, and motor issues in models. Long-term effects remain understudied but align with chronic opioid risks like dependence. Health alerts warn of its dangers, as in Australian reports.
⚖️ Where is Protonitazene Legal? Status in the UK, USA, Germany, Australia, and Asia
Given its extreme risks, Protonitazene is under strict control in most jurisdictions. The United Nations Office on Drugs and Crime (UNODC) has placed it under international control as a Schedule I substance . Researchers must verify their local laws before attempting to order.
| Country / Region | Legal Status | Key Details / Legislation |
|---|---|---|
| United States | Schedule I | Controlled as a Schedule I substance (DEA), meaning it has no accepted medical use and a high potential for abuse . |
| United Kingdom | Class A | Controlled under the Misuse of Drugs Act 1971 as a potent synthetic opioid . |
| Germany | Controlled (Anlage II) | Listed under the New Psychoactive Substances Act (NpSG) or specific narcotics legislation . |
| Australia | Schedule 9 | Classified as a prohibited substance; possession and import are illegal without a specific license . |
| European Union | Controlled | The EU Drugs Agency (EUDA) monitors nitazenes closely, and individual member states have scheduled it . |
“As of 2024, the UNODC has listed Protonitazene as a Schedule I Substance due to the sudden increase in sales and usage, mostly in North America, Australia, and Europe. The EUDA considers Protonitazene one of the most dangerous nitazenes due to its potency.”
It is your sole responsibility to ensure compliance with all applicable local, state, and federal laws. Chem14.com sells products strictly for legitimate research purposes to qualified buyers. For more on our stance, please read our legal disclaimer .
Where to Buy Protonitazene Online: Best Practices for Researchers in New York, London, and Berlin
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🔎 Protonitazene vs. Other Nitazenes: A Researcher’s Comparison
To better understand where Protonitazene fits in the current research landscape, it helps to compare it with other dangerous NPS opioids.
| Feature | Protonitazene | Metonitazene | Isotonitazene | Fentanyl |
|---|---|---|---|---|
| Class | Benzimidazole Opioid | Benzimidazole Opioid | Benzimidazole Opioid | Phenylpiperidine |
| Primary Action | μ-Opioid Receptor Agonist | μ-Opioid Receptor Agonist | μ-Opioid Receptor Agonist | μ-Opioid Receptor Agonist |
| Relative Potency | Up to 100x heroin | ~50-100x morphine | ~500x morphine | 50-100x morphine |
| Key Structural Feature | Propoxybenzyl group | Methoxybenzyl group | Isopropoxybenzyl group | Phenethyl group |
| Main Research Risk | Respiratory Depression | Respiratory Depression | Respiratory Depression | Respiratory Depression |
| CAS Number | 95958-84-2 | 14680-51-4 | 14188-81-9 | 437-38-7 |
| UNODC Status | Schedule I | Schedule I | Schedule I | Schedule II |
This table illustrates the subtle structural changes that define each nitazene analog, leading to variations in potency and binding affinity, which are critical for structure-activity relationship (SAR) studies .
What is the CAS number for Protonitazene?
The correct Chemical Abstracts Service number for Protonitazene is 95958-84-2 . This is essential for accurate chemical identification and ordering.
How strong is Protonitazene compared to fentanyl and morphine?
Protonitazene is a μ-opioid receptor agonist that induces effects at subnanomolar concentrations at a much higher potency than morphine and fentanyl . It is estimated to be up to 100 times more potent than heroin .
Can naloxone reverse a Protonitazene overdose?
Yes, naloxone (Narcan) is effective at reversing Protonitazene’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 . Immediate emergency medical attention is critical.
Is it legal to buy Protonitazene in the UK or USA?
For human consumption, no. In the UK, it is a Class A drug, and in the USA, it is a Schedule I controlled substance. 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.
How is Protonitazene detected in biological samples?
Standard opioid test strips do not detect Protonitazene. Detection requires advanced analytical techniques like liquid chromatography-tandem mass spectrometry (LC-MS/MS) or gas chromatography-mass spectrometry (GC-MS) . A key metabolite to look for is 4′-Hydroxy-nitazene, which is shared among many nitazenes and can indicate exposure.
Why was Protonitazene developed if it’s so dangerous?
CIBA originally synthesized it 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 medical use .
How should Protonitazene be stored in a laboratory?
To maintain stability and purity, store Protonitazene 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 signs of a Protonitazene-related opioid toxicity?
Signs include slow, shallow, or stopped breathing, reduced consciousness (difficulty waking up), pinpoint pupils, and clammy skin . Due to its potency, respiratory depression can occur very rapidly.
What makes Protonitazene different from fentanyl?
Protonitazene belongs to benzimidazole opioids (nitazenes), structurally unlike fentanyl but with comparable or higher potency at μ-receptors, often causing faster, more severe respiratory issues.
Is Protonitazene legal to buy for research in the USA?
In the USA, it’s Schedule I, restricting use to licensed research. Always comply with regulations; Chem14.com sells for legitimate lab purposes only.
How strong is Protonitazene compared to morphine?
Studies show Protonitazene up to 200 times stronger than morphine in antinociception tests, with effects at subnanomolar levels.
Can naloxone reverse Protonitazene overdose?
Yes, as a μ-agonist, naloxone reverses effects, but higher or repeated doses may be needed due to extreme potency.
Where is Protonitazene appearing most in overdoses?
Reports highlight increases in USA, UK, Europe, Australia, and Canada, often mixed in fake pills or sold as other drugs.
What precautions should researchers take with Protonitazene?
Use PPE, work in controlled environments, follow dosing protocols precisely, and store securely. Review our safety guidelines.
Disclaimer: All products sold by Chem14.com are strictly for research and forensic purposes only. They are not intended for human consumption or in vivo testing. Purchasers must be over 18 years of age and comply with all applicable local and national laws.


