Quick classification guide
4-digit heading: Pick the broad category (e.g. 2801).
Inclusions/exclusions: Confirm your product matches.
Rate check: Verify the latest notifications before filing.
Browse HSN codes in Chapter 28
Next steps
If you’re unsure about the chapter, use the global search and compare descriptions.
Jump to nearby chapters to avoid wrong classification (common GST mistake).
After finalizing your HSN, generate a clean rate card for shop display or staff reference.
Not legal advice • Always verify before filing • Last reviewed: 22 Jan 2026
Analysis of Chapter 28
Inorganic Chemicals. Acids, Bases, Oxides. Mostly 18%.
Included
- Sulphuric Acid
- Oxygen
- Chlorine
- Ammonia
Excluded
- Organic ChemicalsGo to Ch 29
- MedicinesGo to Ch 30
Expert insights
Chemical fertilizer is Ch 31. Pure chemicals are Ch 28.
- • Inorganic (Ch 28) vs Organic (Ch 29): Carbon-based is usually 29.
Compliance checklist
- • 4-digit HSN: turnover-based rules apply (B2B often needs HSN).
- • 6-digit HSN: typically required beyond higher turnover thresholds.
- • Export/Import: use full code as per customs documents.
FAQs for Chapter 28
Is Oxygen taxed?▾
Medical oxygen is 5%.
Sources & accuracy
General GST guidance, return filing references, and updates.
Rates, exemptions, and clarifications may change via notifications/circulars.
Use chapter notes/headings to avoid misclassification.
Last reviewed: 22 Jan 2026. How we update content + sources.
Not legal advice • Always verify before filing • Page URLs use your deployed site base.