Overview
5-Nitrosalicylaldehyde is an aromatic aldehyde derivative featuring both a nitro (-NO2) and a hydroxyl (-OH) group on a benzene ring. Its molecular structure (C7H5NO4) makes it a versatile intermediate in organic synthesis, particularly for pharmaceuticals and dyes. The compound is synthesized through nitration of salicylaldehyde, yielding a yellow crystalline solid. Its reactivity stems from the electron-withdrawing nitro group, which enhances the electrophilicity of the aldehyde carbonyl, facilitating condensation and complexation reactions.
Physical and Chemical Properties
5-Nitrosalicylaldehyde exhibits a melting point range of 148-152°C and forms stable yellow crystals. It is sparingly soluble in water but dissolves readily in polar organic solvents like ethanol and methanol, making it suitable for solution-phase reactions. The nitro group confers strong UV absorption, with applications in spectrophotometric analysis. The compound’s dual functional groups (aldehyde and hydroxyl) allow chelation with metal ions, useful in coordination chemistry and catalyst design.
Main Applications
In pharmaceuticals, 5-nitrosalicylaldehyde serves as a precursor for antibiotics and antifungal agents. Its aldehyde group participates in Schiff base formation, a key step in synthesizing bioactive imines. The compound is also employed in dye manufacturing, where its nitro group contributes to chromophore development. Additionally, it acts as a ligand in metal-organic frameworks (MOFs) and catalysts, leveraging its chelating properties for transition metals like copper and nickel.
Safety and Storage
As a nitroaromatic compound, 5-nitrosalicylaldehyde requires careful handling. It may cause skin/eye irritation and respiratory discomfort if inhaled. Use nitrile gloves, goggles, and fume hoods during processing. Store in amber glass bottles or airtight containers to prevent degradation by light and moisture. Incompatible with strong oxidizers and bases; keep away from heat sources. Follow local regulations for disposal due to potential environmental persistence.
B2B Procurement Guide
When sourcing 5-nitrosalicylaldehyde, prioritize suppliers with ISO certification and batch-specific COAs (Certificates of Analysis). Key specifications include purity (≥98%), residual solvent levels, and particle size uniformity. Bulk purchases (25kg drums) typically reduce costs by 10-20%. Confirm logistics conditions—some vendors offer temperature-controlled shipping for stability. For R&D use, smaller quantities (100g-1kg) are available with faster lead times.
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