An Analytical Reference Standard
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Isomer(s)
34946Ethylene Nitazene (citrate)
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Menitazene (citrate)

Item No. 36634

Product Insert (PDF)GC-MS (PDF)Safety Data Sheet (SDS) (PDF)
Technical Information
Formal Name
N,N-diethyl-2-[(4-methylphenyl)methyl]-5-nitro-1H-benzimidazole-1-ethanamine, 2-hydroxy-1,2,3-propanetricarboxylate
Molecular Formula
C21H26N4O2 • C6H8O7
Formula Weight
558.6
Purity
≥98%
Formulation
A crystalline solid
Solubility(Learn about Variance in Solubility)
DMF: 3 mg/mlDMSO: 2 mg/mlEthanol: insolPBS (pH 7.2): insol
λmax
243 nm
SMILES
CC(C=C1)=CC=C1CC(N2CCN(CC)CC)=NC3=C2C=CC([N+]([O-])=O)=C3.OC(CC(O)=O)(C(O)=O)CC(O)=O
InChi Code
InChI=1S/C21H26N4O2.C6H8O7/c1-4-23(5-2)12-13-24-20-11-10-18(25(26)27)15-19(20)22-21(24)14-17-8-6-16(3)7-9-17;7-3(8)1-6(13,5(11)12)2-4(9)10/h6-11,15H,4-5,12-14H2,1-3H3;13H,1-2H2,(H,7,8)(H,9,10)(H,11,12)
InChi Key
BZSZTIMYGSCLBH-UHFFFAOYSA-N
Shipping & Storage Information
Storage
-20°C
Shipping
Room temperature in continental US; may vary elsewhere
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    1 mg

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    Product Description

    Menitazene (citrate) (Item No. 36634) is an analytical reference standard categorized as an opioid.1 Metonitazene has analgesic effects in mice. This product is intended for research and forensic applications.

    WARNING This product is not for human or veterinary use.

    References & Product Citations
    Product Description References

    1. Ujváry, I., Christie, R., Evans-Brown, M., et al. DARK classics in chemical neuroscience: Etonitazene and related benzimidazoles. ACS Chem. Neurosci. 12(7), 1072-1092 (2021).

    Product Citations

    Souza, K.A.O., Santos, N.C.B.F., Lanaro, R., et al. Micro-QuEChERS extraction for broad-spectrum LC-QQQ-MS quantification of nitazene analogs in plasma: A validated method with casework application. Drug Test Anal. (2026).

    Hardwick, E.K., and Davidson, J.T. Structural characterization of nitazene analogs using electrospray ionization-tandem mass spectrometry (ESI-MS/MS). Drug Test Anal. (2025).

    Kozell, L.B., Eshleman, A.J., Wolfrum, K.M., et al. Pharmacology of newly identified nitazene variants reveals structural determinants of affinity, potency, selectivity for mu opioid receptors. Neuropharmacology 276, 110512 (2025).

    Leonard, A.C., Lenert-Mondou, C., Chayer, R., et al. Computational design of dynamic biosensors for emerging synthetic opioids. BioRxiv (2025).