Lignin sulphonates
Lignin sulphonates from wood pulp manufacture
HSN 3804 00 10 (Lignin sulphonates) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code (IEC), bill of entry, commercial invoice, packing list. Other residual lyes and chemically treated by-products within Chapter 38 may attract scrutiny depending on intended use — particularly where the product is presented as a concrete admixture or dispersant with specific performance claims.
Lignin sulphonates are industrial by-products with broad downstream uses — concrete plasticisers, dust suppressants, animal feed binders — and customs officers may query classification if the commercial invoice describes the product by its end-use application rather than its chemical identity. Re-classification to a more specific tariff line triggers retrospective compliance and potential detention. Document the product's origin in wood pulp processing and its chemical specification precisely to anchor the 3804 00 10 classification at examination.