2927.00.03.00 - 4-Aminoazobenzenedisulfonic acid, monosodium salt

This HTS category, 2927.00.03.00, specifically classifies the monosodium salt of 4-Aminoazobenzenedisulfonic acid. This compound is a diazo compound, characterized by the presence of both an amino group and a disulfonic acid group attached to an azobenzene structure, and is further defined by its monosodium salt form. Its primary applications are often as an intermediate in the synthesis of dyes and other organic chemicals, leveraging its reactive functional groups for further chemical transformations.

Distinguishing this entry from its siblings is crucial for accurate classification. While sibling 2927.00.06.00 covers p-Aminoazobenzenedisulfonic acid itself and Diazoaminobenzene, this node is specifically for the *monosodium salt* of 4-Aminoazobenzenedisulfonic acid. This distinction lies in the chemical modification to form the salt, which can affect solubility and reactivity. Other siblings like 2927.00.15.00 and 2927.00.18.00 cover entirely different diazo compounds with distinct chemical structures and intended uses, such as blowing agents (1,1'-Azobisformamide) or complex naphthalene sulfonic acid derivatives used in specialized applications.

As 2927.00.03.00 represents a leaf node in the HTS structure, there are no further subdivisions under this specific code. Classification into this subcategory therefore depends solely on meeting the precise chemical identity and salt form of 4-Aminoazobenzenedisulfonic acid, monosodium salt. Importers and exporters must verify that the imported or exported substance precisely matches this description to ensure correct duty assessment and compliance with trade regulations.