Description

4-Nitroindazole (CAS No. 2942-40-7) is a high-purity nitro-substituted indazole derivative with the molecular formula C₇H₅N₃O₂. This heterocyclic aromatic compound is widely utilized in pharmaceutical research, medicinal chemistry, and organic synthesis due to its versatile reactivity as a building block. Our product is rigorously tested to ensure ≥98% purity (HPLC) and is supplied as a fine yellow crystalline powder with excellent batch-to-batch consistency. 4-Nitroindazole serves as a key intermediate in the development of enzyme inhibitors, receptor modulators, and other bioactive molecules. The compound is packaged under inert atmosphere to ensure long-term stability and is available in research quantities from milligrams to kilogram scale with customizable packaging options.

Key Specifications:
– CAS: 2942-40-7
– Molecular Weight: 163.13 g/mol
– Melting Point: 215-218°C (dec.)
– Purity: ≥98% (HPLC)
– Storage: Room temperature, desiccated
– Hazard Codes: Xi (Irritant)

Properties

• CAS Number: 2942-40-7
• Complexity: 192
• IUPAC Name: 4-nitro-1H-indazole
• InChI: InChI=1S/C7H5N3O2/c11-10(12)7-3-1-2-6-5(7)4-8-9-6/h1-4H,(H,8,9)
• InChI Key: WBTVZVUYPVQEIF-UHFFFAOYSA-N
• Exact Mass: 163.038176411
• Molecular Formula: C7H5N3O2
• Molecular Weight: 163.13
• SMILES: C1=CC2=C(C=NN2)C(=C1)[N+](=O)[O-]
• Topological: 74.5
• Monoisotopic Mass: 163.038176411
• Synonyms: 4-Nitro-1H-indazole, 2942-40-7, 4-Nitroindazole, 1H-Indazole, 4-nitro-, INDAZOLE, 4-NITRO-, NSC 96892, BRN 0008161, 99ML8W90BD, NSC-96892, DTXSID70183637, 5-23-06-00179 (Beilstein Handbook Reference), 1H-Indazole, 4-nitro-(8CI), DTXCID10106128, 1H-Indazole, 4-nitro-(8CI)(9CI), 800-019-1, inchi=1/c7h5n3o2/c11-10(12)7-3-1-2-6-5(7)4-8-9-6/h1-4h,(h,8,9, MFCD00022784, MLS002703355, CHEMBL393456, 4nitroindazole, 4-nitro indazole, NSC96892, 4-nitro-1H-indazol, 4-nitro 1H-indazole, 4-nitro-1 H-indazole, 4-Nitro-1H-indazole #, NCIOpen2_001613, UNII-99ML8W90BD, WLN: T56 BMNJ FNW, SCHEMBL166086, SCHEMBL647458, SCHEMBL1156105, SCHEMBL7775530, BCP26691, CS-D0097, BDBM50304143, SBB066702, AKOS005070452, AKOS015966074, AC-7079, BCP9000167, PB32089, SMR001570077, SY003894, 4P-009, EN300-120212, A819913, Z381673564

Application

4-Nitroindazole finds primary application as a versatile scaffold in medicinal chemistry for the design of nitric oxide synthase (NOS) inhibitors and other enzyme-targeting compounds. Researchers employ this intermediate in the synthesis of potential therapeutic agents for neurological disorders and cardiovascular diseases. The nitro group provides an excellent handle for further functionalization through reduction or nucleophilic aromatic substitution reactions. In material science, 4-nitroindazole derivatives have shown promise as components in energetic materials and photoactive compounds.

Safety and Hazards

GHS Hazard Statements

• H302 (50%): Harmful if swallowed [Warning Acute toxicity, oral]
• H311 (50%): Toxic in contact with skin [Danger Acute toxicity, dermal]
• H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335 (100%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P261, P262, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P316, P319, P321, P330, P332+P317, P337+P317, P361+P364, P362+P364, P403+P233, P405, and P501

Hazard Classes and Categories

• Acute Tox. 4 (50%)
• Acute Tox. 3 (50%)
• Skin Irrit. 2 (100%)
• Eye Irrit. 2A (100%)
• STOT SE 3 (100%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.