2935.90.20.00 - Fast color bases and fast color salts

This HTS category, 2935.90.20.00, specifically covers "Fast color bases and fast color salts." These are chemical compounds, typically organic, that are used in the textile industry to form azo dyes directly on the fabric. Fast color bases are usually aromatic amines or phenols that are diazotized, while fast color salts are the resulting diazonium salts. Their primary function is to create vibrant and wash-fast colors on various textile materials.

Within the broader "Sulfonamides: Other: Other" classification, this particular subheading distinguishes itself by its specialized application as precursors for textile dyeing. While other "Other" subcategories at this level might encompass different types of sulfonamides or unrelated organic chemicals, this one is narrowly defined by its role in the production of fast colors, which are essential for achieving durable and high-quality textile coloration.

As this is a leaf node in the HTS classification, there are no further subcategories. Therefore, classification within 2935.90.20.00 is determined by whether the imported goods precisely fit the description of "fast color bases and fast color salts" intended for use in textile dyeing. Factors such as chemical composition, purity, and intended application, as confirmed by product documentation and laboratory analysis if necessary, are crucial for accurate classification.