In the precise world of chemical manufacturing and research, the specifications of raw materials dictate the success of a process. 5-Amino-1-Naphthalenesulfonic Acid (CAS 84-89-9), a key intermediate, is no exception. For professionals looking to buy this compound, understanding its critical specifications is paramount to ensuring optimal performance and consistent results. This guide outlines what to look for when evaluating suppliers and making your purchase.

Purity: The Non-Negotiable Standard

The most critical specification for 5-Amino-1-Naphthalenesulfonic Acid is its purity. For applications in dyestuffs and organic synthesis, a purity level of 98.0% or higher is typically required. Some advanced applications may even demand 99.0% purity. A reliable manufacturer will clearly state the minimum purity and provide supporting analytical data, usually from High-Performance Liquid Chromatography (HPLC) or Gas Chromatography (GC). Always request a Certificate of Analysis (CoA) with each batch to verify these figures. Impurities can lead to off-colors in dyes or interfere with complex synthesis reactions, so meticulous attention to purity is vital when you buy.

Appearance and Physical Properties

The visual appearance of 5-Amino-1-Naphthalenesulfonic Acid is another key indicator. It is commonly described as a powder ranging in color from purple to dark purple or even dark red. While slight variations can occur based on the specific grade and manufacturing process, a significant deviation from this description might warrant further investigation. Information on solubility (e.g., soluble in hot water) and melting point (often >300°C, indicating decomposition) are also important physical properties that suppliers should provide. These details help in handling and processing the material correctly.

Analytical Data and Identification

Beyond purity, suppliers may offer various analytical data to confirm the identity and quality of the product. This can include Mass Spectrometry (MS) data, Nuclear Magnetic Resonance (NMR) spectra, and Infrared (IR) spectroscopy. These techniques verify the molecular structure and confirm that you are indeed purchasing 5-Amino-1-Naphthalenesulfonic Acid. For purchase decisions, ensuring that the supplier can readily provide these identification documents, along with safety data sheets (SDS), is a hallmark of a reputable chemical provider.

Packaging and Storage Considerations

The packaging and recommended storage conditions for 5-Amino-1-Naphthalenesulfonic Acid are also important considerations for buyers. It is typically supplied in various quantities, from grams for laboratory use to kilograms or tons for industrial production. Packaging materials should protect the product from moisture and contamination. Proper storage at room temperature, as often recommended, helps maintain its stability and shelf life. When you buy, confirm that the packaging aligns with your storage capabilities and quantity requirements.

In summary, when you decide to buy 5-Amino-1-Naphthalenesulfonic Acid, focus on obtaining detailed specifications, particularly purity and analytical data, from your chosen supplier. Prioritizing these details ensures you receive a chemical that will perform reliably in your applications, whether it’s for vibrant dyestuffs or intricate organic synthesis.