HSN Code 3805 refers to "Gum, wood or sulphate turpentine and other terpenic oils produced by the distillation or other treatment of coniferous woods; crude dipentene; sulphite turpentine and other crude para-cymene; pine oil containing alpha-terpineol as the main constituent." This classification code is essential for identifying terpenic oils and related products for import/export purposes based on their nature, composition, and intended use. Common products under HSN Code 3805 include wood turpentine, sulphate turpentine, crude dipentene, and pine oil. Additionally, the GST rate for terpenic oils and related substances under this code ensures accurate trade compliance.