AnodyneWiki

Metonitazene

Metonitazene

Salts []
Metonitazene hydrochloride

Molecular structure via molpic based on CDK

Physical properties []
Molecular mass	382.5 g/mol ^[1]
Predicted LogP	3.9 ^[1]

Structural Identifiers []
Molecular formula	C₂₁H₂₆N₄O₃ ^[1]
IUPAC name	N,N-diethyl-2-[2-[(4-methoxyphenyl)methyl]-5-nitrobenzimidazol-1-yl]ethanamine ^[1]
SMILES	CCN(CC)CCN1C2=C(C=C(C=C2)[N+](=O)[O-])N=C1CC3=CC=C(C=C3)OC ^[1]
InChI	InChI=1S/C21H26N4O3/c1-4-23(5-2)12-13-24-20-11-8-17(25(26)27)15-19(20)22-21(24)14-16-6-9-18(28-3)10-7-16/h6-11,15H,4-5,12-14H2,1-3H3 ^[1]
InChIKey	HNGZTLMRQTVPBH-UHFFFAOYSA-N ^[1]

Metonitazene (also known as Dea no. 9757, N,N-diethyl-2-(2-((4-methoxyphenyl)methyl)-5-nitrobenzimidazol-1-yl)ethanamine, N,N-diethyl-2-(2-(4-methoxybenzyl)-5-nitro-1H-benzimidazol-1-yl)ethan-1-amine, Dtxcid501766642, Chebi:234362, Benzimidazole, 1-(2-(diethylamino)ethyl)-2-(p-methoxybenzyl)-5-nitro-, N,N-Diethyl-2-((4-methoxyphenyl)methyl)-5-nitro-1H-benzimidazole-1-ethanamine, N,N-diethyl-2-[(4-methoxyphenyl)methyl]-5-nitro-1H-benzimidazole-1-ethanamine, 1H-Benzimidazole-1-ethanamine, N,N-diethyl-2-((4-methoxyphenyl)methyl)-5-nitro- or 1-(Diethylamino)ethyl-2-(4-methoxybenzyl)-5-nitrobenzimidazole) is a opioid substance of the nitazene class.

Chemistry

Salts []

Metonitazene is typically found in the form of its hydrochloride salt.

Stereochemistry []

Metonitazene is a achiral mixture.

Reagents

There are currently 10 reagent-interactions on DrugsPRO

Reagent	Color change
Marquis
Mecke
Mandelin
Liebermann
Froehde
Robadope
Simon's
Morris
Zimmermann
Cannabis (4-AP)

Subjective effects []

class / Opioid

Physical effects
Constipation Cough suppression Difficulty urinating Itchiness Nausea Pain relief Pupil constriction Respiratory depression Sedation Stomach cramp

Cognitive effects
Anxiety suppression Cognitive euphoria Compulsive redosing Increased music appreciation Thought deceleration

Visual effects
Double vision

Experience reports

Erowid

There are currently 2 experience reports involving metonitazene on Erowid: []

Legal status []

Brazil: Metonitazene is a F1 substance.
Germany: Metonitazene is a Anlage II substance.
United Kingdom: Metonitazene is a Class A substance.
United States: Metonitazene is a Schedule I under the "Controlled Substances Act (CSA)".

External links []

References []

National Center for Biotechnology Information. PubChem Compound Summary for CID 53316366, Metonitazene. Accessed June 7, 2026. https://pubchem.ncbi.nlm.nih.gov/compound/53316366
U.S. Food and Drug Administration; National Center for Advancing Translational Sciences. Metonitazene. UNII: A7FF4K4CWB. Global Substance Registration System. Accessed June 7, 2026. https://gsrs.ncats.nih.gov/ginas/app/beta/substances/A7FF4K4CWB