About HSN Code 28111100
HSN Code 28111100 covers Hydrogen Fluoride (hydrofluoric Acid) and attracts a GST rate of 18%. For intra-state supplies, this is split as 9% CGST + 9% SGST. For inter-state supplies, 18% IGST is charged. This code falls under the Chemicals & Materials sector (Paint, fertilizer, rubber, plastics, pharma).
How to Use HSN Code 28111100 on GST Invoices
- Include the HSN code 28111100 on every GST invoice for hydrogen fluoride (hydrofluoric acid)
- Businesses with turnover above ₹5 crore must use 6-digit HSN codes
- Turnover between ₹1.5–5 crore: 4-digit codes are sufficient
- The HSN code must match the product/service description on your invoice
- Incorrect HSN codes can lead to GST notices and ITC mismatches
Related HSN Codes
- 28111200 — Hydrogen cyanide (hydrocyanic acid)
- 28111910 — Other Inorganic Acids and Other Inorganic Oxygen Compounds of Non-metals - Other Inorganic Acids : - Other : Hydrocyanic Acid (hydrogen Cyanide, Prussic Acid)
- 28111920 — Hypophosphorus Acid (phosphinic Acid)
- 28111930 — Acids of Arsenic
- 28111940 — Sulphonic Acid
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Last verified: 2026-06-26 · Source: CBIC Master Tariff