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Natural boric acid containing not more than 85% of H3BO3 ( calculated on the dry weight )

Natural boric acid, not more than 85% H3BO3 on dry weight

NO PGA · STANDARD CUSTOMS PROCEDURE

HSN 2528 00 20 (natural boric acid containing not more than 85% H3BO3 calculated on the dry weight) 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. Refined or higher-purity boric acid, and synthetic boron compounds, may fall under different chapters and tariff lines that carry distinct compliance obligations.

No partner government agency notification covers this tariff line.
A word of counsel

The absence of compliance at this tariff line applies specifically to natural boric acid at or below the 85% H3BO3 threshold; higher-purity refined boric acid is classified under Chapter 28 (inorganic chemicals) and may attract separate obligations. Re-classification on customs examination — triggered by a purity level or origin characteristic that moves the product to a more specific tariff line — carries the risk of detention pending retrospective compliance. Verify purity grade and dry-weight H3BO3 content against the customs tariff declaration before import.

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Frequently asked
Does HSN 2528 00 20 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 boric acid exceeds 85% H3BO3 on a dry-weight basis?
Higher-purity boric acid falls under Chapter 28 as a refined inorganic chemical and may attract compliance obligations distinct from those applicable to the natural mineral form.
Last verified against gazette notifications: 2026-05-16. Source: BIS / DGFT / Indian Customs CUSDATA.
Related
ChapterChapter 25 · Salt; sulphur; earths and stone; plastering materials, lime and cementHSNNATURAL BORATES AND CONCENTRATES THEREOF (WHETHER OR NOT CALCINED), BUT NOT INCLUDING BORATES SEPARATED FROM NATURAL BRINE; NATURAL BORIC ACID CONTAINING NOT MORE THAN 85% OF H3BO3 CALCULATED ON THE DRY WEIGHTHSNNatural borates and concentrates thereof (Whether or not calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 % of H3BO3 calculated on the dry weight: