HSN Code 3815 refers to "Reaction initiators, reaction accelerators and catalytic preparations, n.e.s. (excluding rubber accelerators)." This classification code is essential for identifying chemical products used in various industrial processes for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 3815 include various types of chemical catalysts, polymerization initiators, and accelerators for chemical reactions. Additionally, the GST rate for reaction initiators and catalytic preparations under this code supports accurate trade compliance.