HSN code directory
HSN Code 2811: Other inorganic acids and other in-organic oxygen compounds
Other inorganic acids and other in-organic oxygen compounds of non-metals
All 8-digit HSN codes under this heading
| HSN code | Description |
|---|---|
| 28111100 | Other inorganic acids: hydrogen fluoride (hydrofluoric acid) |
| 28111910 | Other inorganic acids: - other: hydrocyanic acid (hydrogen cyanide, prussic acid) |
| 28111920 | Other inorganic acids: - other: hypophosphorus acid (phosphinic acid) |
| 28111930 | Other inorganic acids: - other: acids of arsenic |
| 28111940 | Other inorganic acids: - other: sulphonic acid |
| 28111990 | Other inorganic acids: - other: other |
| 28112110 | Other inorganic oxygen compounds of non-metals: - carbon dioxide: dry ice |
| 28112190 | Other inorganic oxygen compounds of non-metals: - carbon dioxide: other |
| 28112200 | Other inorganic oxygen compounds of non-metals: silicon dioxide |
| 28112300 | Other inorganic oxygen compounds of non-metals: sulphur dioxide |
| 28112910 | Other inorganic oxygen compounds of non-metals: - other: arsenic pentaoxide |
| 28112920 | Other inorganic oxygen compounds of non-metals: - other: arsenic trioxide |
| 28112930 | Other inorganic oxygen compounds of non-metals: - other: nitrous oxide |
| 28112940 | Other inorganic oxygen compounds of non-metals: - other: carbon monoxide |
| 28112950 | Other inorganic oxygen compounds of non-metals: - other: sulphur trioxide (sulphuric anhydride) |
| 28112990 | Other inorganic oxygen compounds of non-metals: - other: other |
GST rate guide for this chapter
Most inorganic chemicals are taxed at 18%. A few items used as fertiliser inputs, such as sulphuric acid and ammonia, are taxed at 5%.
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GST rates depend on the exact description of the goods in the rate schedules, not only on the HSN code. Some goods under the same heading are taxed at different rates, and conditions or exemptions can apply. Confirm the rate for your product before you raise invoices.
Frequently asked questions
How many digits of the HSN code must I show on a GST invoice?
Businesses with aggregate turnover of up to ₹5 crore in the previous year must show at least a 4-digit HSN code on B2B invoices. Businesses with turnover above ₹5 crore must show a 6-digit code on all invoices. The full 8-digit code is used for imports and exports.
What is the difference between an HSN heading and an 8-digit HSN code?
The first 2 digits are the chapter, 4 digits are the heading and 6 digits are the subheading under the international Harmonized System. India adds 2 more digits for a more precise tariff item, giving the 8-digit code used in customs and GST.
What happens if I use the wrong HSN code?
A wrong HSN code can lead to tax being charged at the wrong rate, mismatches in GSTR-1 and the HSN summary, and notices with interest and penalty. If you are unsure about classification, a CA can review it before you file.
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