For scientists and researchers working with fluorescent probes, a solid understanding of the underlying chemistry of their chosen reagents is crucial for optimal application. 2,6-ANS, chemically known as 6-Anilinonaphthalene-2-Sulfonic Acid (CAS 20096-53-1), is a sophisticated molecule whose properties dictate its powerful utility in biophysical and pharmaceutical research. As a dedicated manufacturer and supplier, we aim to illuminate the chemistry behind this valuable compound.

At its core, 2,6-ANS is a derivative of naphthalene, featuring an aniline group attached at the 6-position and a sulfonic acid group at the 2-position. This specific arrangement of functional groups is key to its environment-sensitive fluorescence. The molecule's structure allows for intramolecular charge transfer (ICT) in polar environments, which often leads to fluorescence quenching. However, in non-polar, hydrophobic environments, such as within the interior of a protein, this ICT pathway is suppressed, resulting in significantly enhanced fluorescence. This differential response is the basis for its use in probing hydrophobic pockets and conformational changes.

The synthesis of 2,6-ANS typically involves multi-step organic reactions. While specific proprietary methods are employed by manufacturers, the general pathway often includes sulfonation and amination reactions on naphthalene precursors. Achieving high purity, such as the 99% we guarantee, requires meticulous control over reaction conditions, purification techniques, and analytical verification. This ensures that researchers who buy 2,6-ANS from us are obtaining a reagent that performs predictably and reliably.

The molecular weight of 2,6-ANS is approximately 299.34 g/mol. Its solubility characteristics are also important; the sulfonic acid group imparts some water solubility, while the anilino-naphthalene moiety contributes to its affinity for hydrophobic regions. These properties are finely balanced, making it suitable for studies in aqueous buffer systems with the potential to interact with hydrophobic biomolecular structures.

For those in the pharmaceutical industry or academic research, sourcing this advanced chemical intermediate from an experienced manufacturer and supplier is critical. We are committed to providing not just high-quality 2,6-ANS, but also the foundational knowledge to empower its effective use. Contact us to learn more about the synthesis, properties, and applications of 2,6-ANS, and to request a quote for your research needs. We are your trusted partner for sourcing this essential tool.