Other

Natural borates and concentrates, other than brine-separated

NO PGA · STANDARD CUSTOMS PROCEDURE

HSN 2528 00 90 (Other natural borates and concentrates — not separated from natural brine, 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. Boron compounds processed beyond the natural or calcined state — such as refined boron chemicals — may fall under Chapter 28, where distinct compliance requirements can apply.

No partner government agency notification covers this tariff line.

A word of counsel

The principal importer risk at this tariff line is misclassification: natural boric acid with H3BO3 content exceeding 85% on dry weight falls outside Chapter 25 entirely and is classified under Chapter 28, which carries a separate compliance environment. Similarly, borates separated from natural brine are excluded from this heading and classified elsewhere. Customs re-classification on examination triggers retrospective duty recovery and potential detention; verify purity certificates and process provenance before filing the bill of entry.

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Frequently asked

Does HSN 2528 00 90 require any pre-import registration?

A valid Importer-Exporter Code is required for any commercial import; no product-specific registration applies to this tariff line.

What changes if the natural boric acid has H3BO3 content above 85% on dry weight?

Boric acid exceeding that purity threshold falls outside Chapter 25 and is classified under Chapter 28, where different compliance requirements may apply.

Last verified against gazette notifications: 2026-05-16. Source: BIS / DGFT / Indian Customs CUSDATA.