Natural sodium borates and concentrates thereof (whether or not calcined)
Natural sodium borates and concentrates, whether or not calcined
HSN 2528 00 10 (natural sodium borates and concentrates thereof, whether or not calcined) 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, bill of entry, commercial invoice, packing list. Borates separated from natural brine, and refined boric acid exceeding 85% H3BO3, are excluded from Chapter 25 heading 2528 and may carry distinct compliance under their respective classifications.
The principal risk at this tariff line is misclassification: borates derived from brine separation rather than natural mineral sources fall outside heading 2528 entirely, and refined boric acid above the 85% H3BO3 threshold is separately classified in Chapter 28 — both positions may attract compliance obligations absent here. Customs re-classification on examination triggers retrospective compliance and risks detention pending resolution. Importers should document the mineral source, calcination state, and H3BO3 purity grade before filing the bill of entry.