Overview
9-Anthraldehyde is an aromatic aldehyde derived from anthracene, featuring a formyl group at the 9-position. It serves as a versatile building block in organic chemistry, particularly in the synthesis of more complex molecules. The compound's conjugated system and reactive aldehyde group make it valuable for creating fluorescent dyes, pharmaceutical intermediates, and specialty chemicals. First synthesized in the early 20th century, 9-anthraldehyde has become an important reagent in both academic and industrial settings. Its unique structure allows for various chemical transformations, including condensation reactions and nucleophilic additions, which are fundamental in medicinal chemistry and materials science.
Physical and Chemical Properties
9-Anthraldehyde appears as a pale yellow to light brown crystalline powder with a distinct aromatic odor. It exhibits moderate stability under normal conditions but may degrade upon prolonged exposure to light or air. The compound's melting point typically ranges between 104-108°C, making it relatively stable at room temperature. Chemically, the aldehyde group at the 9-position is highly reactive, participating in typical carbonyl reactions such as aldol condensations and Grignard additions. The anthracene backbone contributes to its UV absorption properties, making it useful in spectroscopic applications. Its solubility profile favors organic solvents, with negligible solubility in water, which influences its handling and application methods.
Main Applications
In pharmaceutical manufacturing, 9-anthraldehyde serves as a key intermediate for synthesizing anthraquinone derivatives and other bioactive molecules. Its structural features are particularly valuable in developing anticancer and antimicrobial compounds. The compound's fluorescence properties also make it suitable for creating optical brighteners and luminescent materials. Industrial applications include its use as a precursor for dyes and pigments, especially those requiring high color fastness. Research laboratories employ 9-anthraldehyde as a reagent for studying charge-transfer complexes and as a building block for supramolecular chemistry. Recent developments explore its potential in organic electronics and photovoltaic materials.
Safety and Storage
Proper handling of 9-anthraldehyde requires appropriate personal protective equipment, including gloves, goggles, and lab coats. The compound may cause skin and eye irritation upon contact, and inhalation of dust should be avoided. Work areas should be well-ventilated, and direct exposure to light minimized to prevent degradation. For storage, maintain the chemical in its original container or an amber glass bottle with a tight-sealing lid. Ideal storage conditions include a cool (15-25°C), dry environment separate from incompatible substances such as strong oxidizers. For long-term preservation, consider storing under inert gas to prevent oxidation of the aldehyde group.
B2B Procurement Guide
When sourcing 9-anthraldehyde commercially, prioritize suppliers with proven track records in fine chemical manufacturing. Key specifications to verify include purity level (typically 98% or higher for most applications), residual solvent content, and absence of heavy metal contaminants. Technical data sheets and certificates of analysis should accompany each shipment. Bulk procurement (kilogram quantities) generally offers significant cost advantages, with prices commonly ranging from $50-$200 per gram depending on purity and order volume. Establish quality control protocols to test received materials, particularly for research-grade applications where consistency is critical. Consider supplier capabilities for custom synthesis or derivative production if your applications require modified versions of the compound.
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