What is HSN Code 291735?
HSN code 291735 is the Harmonized System of Nomenclature classification for Phthalic Anhydride under India's Goods and Services Tax (GST). It is a 6-digit code sitting at the sub-heading (6-digit) level of the HSN hierarchy.
This code belongs to Chapter 29 — Organic Chemicals, which is part of Section VI: Chemical Products. Every GST-registered business supplying phthalic anhydride must quote HSN 291735 (or the digit-length required for its turnover) on tax invoices and in GSTR-1.