Overview
Rhodamine aldehyde is a derivative of rhodamine dyes, characterized by an aldehyde functional group that enables covalent conjugation with biomolecules. It serves as a critical intermediate in synthesizing fluorescent probes for life science research and diagnostic applications. The compound's distinct orange-red fluorescence under specific wavelengths makes it valuable in techniques requiring high signal-to-noise ratios. Its reactivity with amines via Schiff base formation allows precise tagging of proteins, antibodies, and nucleic acids.
Physical and Chemical Properties
As a xanthene-based dye, rhodamine aldehyde exhibits strong absorption in the 540-570 nm range with emission peaks between 560-590 nm. The aldehyde group (-CHO) at the molecular terminus provides selective reactivity while maintaining the core fluorophore's photostability. Its limited water solubility necessitates polar organic solvents for stock solutions. The crystalline form is stable at room temperature but may degrade under prolonged UV exposure or oxidizing conditions. Spectroscopic properties can vary slightly depending on solvent polarity and pH.
Main Applications
In biotechnology, rhodamine aldehyde is primarily used to prepare fluorescent conjugates for cellular imaging. It labels antibodies in immunofluorescence and hybridizes with oligonucleotides for FISH (fluorescence in situ hybridization). Industrial applications include security inks and optical sensors. The dye's pH-sensitive fluorescence also enables its use in microenvironmental studies, such as lysosomal pH tracking in live cells. Recent developments explore its potential in super-resolution microscopy techniques.
Safety and Storage
As a fine chemical powder, rhodamine aldehyde requires handling in ventilated environments. The compound may cause eye/skin irritation, and chronic exposure risks include respiratory sensitization. Always consult the specific Material Safety Data Sheet (MSDS) before use. For long-term storage, aliquot the powder under argon in amber glass vials with desiccants. Prepared solutions should be used within weeks and protected from light. Dispose of waste according to local regulations for organic dyes.
B2B Procurement Guide
Bulk purchasers should prioritize suppliers with ISO 13485 certification for diagnostic-grade material. Key specifications include HPLC purity certificates (typically ≥95%), absence of heavy metal contaminants, and validated fluorescence intensity data. Request custom synthesis options for large-scale orders (kilogram quantities), which may reduce costs by 20-30%. Consider suppliers offering pre-conjugated derivatives (e.g., rhodamine-aldehyde-dextran) to streamline downstream applications. Lead times for specialty orders often exceed 4-6 weeks.
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