Protonitazene: A High-Potency N-Benzyl Benzimidazole Opioid for Cutting-Edge Pharmacological Research

Product Name: Protonitazene
Chemical Name: N,N-diethyl-2-[(4-propoxyphenyl)methyl]-5-nitro-1H-benzimidazol-1-yl]ethanamine
CAS Number: 2768548-83-6
Molecular Formula: C₂₃H₃₁N₅O₃
Molar Mass: 449.53 g/mol
Appearance: Fine, white to off-white crystalline powder or solid

Introduction: A Potent Tool for Opioid Receptor Research

Protonitazene represents a significant compound within the novel class of N-benzyl substituted benzimidazole opioids, a group that has become critically important in advanced pharmacological and forensic research. It is structurally characterized by a benzimidazole core, a essential nitro group at the 5-position, and a defining propoxy substitution on the phenyl ring. This propoxy chain is a key differentiator from other analogs like Metonitazene (methoxy) or Isotonitazene (ethoxy), and is a primary focus for researchers studying how alkyl chain length on the phenyl ring affects receptor binding kinetics, functional activity, and metabolic stability. Protonitazene provides a powerful tool for deconstructing the complex structure-activity relationships that govern this potent class of synthetic opioids.

This product is synthesized to the highest standards of purity and is provided exclusively for non-human, in vitro research applications in qualified laboratory settings.

Key Characteristics and Research Properties

• Exceptional Potency: Protonitazene is documented in emerging scientific literature as an ultra-high potency agonist at the μ-opioid receptor (MOR). Early in vitro studies suggest it possesses potency significantly greater than morphine, placing it among the most potent compounds in its class. This extreme potency necessitates the use of specialized, calibrated analytical equipment (e.g., micro-balances) and stringent handling protocols to ensure researcher safety and experimental precision.

• N-Benzyl Benzimidazole Structure: Its core structure places it within a distinct and modern class of synthetic opioids. This structure is a vital subject for research into non-traditional opioid receptor interactions and the resulting unique pharmacological effects compared to fentanyl analogs or classical opioids.

• Propoxy Substitution: The propoxy (OCH₂CH₂CH₃) group is the defining structural feature for this analog. The increased chain length, compared to methoxy or ethoxy, enhances lipophilicity, which can influence blood-brain barrier penetration in model systems and dramatically affect binding affinity and intrinsic activity at the receptor site. This makes it an indispensable compound for meticulous SAR studies.

• Receptor Binding and Signaling: This compound is utilized in vitro to study high-affinity binding kinetics (e.g., association/dissociation rates, Ki values) and functional efficacy (e.g., EC50, Emax) at human opioid receptor subtypes. It is particularly relevant for research into G-protein coupling bias and beta-arrestin recruitment pathways, which are hypothesized to correlate with specific physiological outcomes.

Intended Applications and Research Use

Protonitazene is a chemical for controlled scientific investigation and is categorically not for human or veterinary use.

Its primary applications include, but are not limited to:

• Forensic Toxicology: Serving as a critical high-purity reference standard for the development, validation, and application of advanced analytical methods (e.g., GC-MS, LC-HRMS, LC-MS/MS) for the unambiguous detection and quantification of this potent substance and its metabolites in forensic and clinical toxicology samples.

• Advanced Pharmacological Research: In vitro investigation of efficacy, potency, and binding kinetics at human μ-opioid receptors. It is used to study receptor activation, signaling bias, and downstream cellular responses in controlled models.

• Metabolic Pathway Analysis: Investigation of cytochrome P450 metabolism using human liver microsome or hepatocyte models to identify characteristic phase I and II metabolites. This is crucial for understanding its metabolic fate, predicting drug-drug interactions, and developing targeted forensic screening protocols.

• Structure-Activity Relationship (SAR) Research: Essential for researchers systematically mapping how specific alkyl chain extensions on the phenyl ring affect binding affinity, efficacy, and selectivity at opioid receptor subtypes. It is used for comparative studies against other analogs like Metonitazene, Isotonitazene, and Butonitazene.

Handling, Storage, and Safety Information

• Purity: >98% (as rigorously verified by High-Performance Liquid Chromatography (HPLC) and tandem Mass Spectrometry (MS/MS)).

• Solubility: Soluble in common organic solvents such as dimethyl sulfoxide (DMSO), ethanol, and methanol. It has very limited solubility in water.

• Storage: Must be stored in its original sealed container under inert conditions. Storage should be in a cool, dry, and dark environment, ideally refrigerated between +2°C and +8°C, to protect it from light, moisture, and oxidative degradation, ensuring long-term stability.

• Handling: EXTREME CAUTION – ULTRA-HIGH POTENCY COMPOUND. This material is active in the microgram to nanogram range and poses a severe, immediate risk of life-threatening respiratory depression even through minimal accidental exposure. It must only be handled by extensively trained researchers in a controlled laboratory setting. Mandatory safety protocols include the use of personal protective equipment (PPE) such as nitrile gloves, a lab coat, safety glasses, and the mandatory use of a certified fume hood or glove box for any manipulation of the pure powder. Strict decontamination procedures must be in place.