HSN Codes · Chapter 28: Inorganic Chemicals

HSN Code 2809

Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined

Typical GST rate

Varies

Depends on sub-classification

Type

Goods

HSN classification

Code level

4-digit

Heading

Reading code 2809

The first two digits (28) place this code in chapter 28 — Inorganic Chemicals. As a 4-digit heading it groups a whole product family; 6 and 8-digit codes underneath it get more specific. Remember: you can never invent a shorter code by truncating a longer one — only codes that exist in the official tariff are valid.

Industrial inorganic chemicals — acids, alkalis, oxides, and salts — plus compounds of precious and rare-earth metals.

More specific codes under 2809

  • 280910 — Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined — diphosphorus pentaoxide
  • 28091000 — Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined — diphosphorus pentaoxide — diphosphorus pentaoxide
  • 280920 — Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined — phosphoric acid and polyphosphoric acids
  • 28092010 — Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined — phosphoric acid and polyphosphoric acids — phosporic acid
  • 28092020 — Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined — phosphoric acid and polyphosphoric acids — polyphosphoric acids

Frequently asked questions

The GST rate under 2809 depends on the specific item and applicable notifications. Check the classification with our HSN code finder and confirm the rate before invoicing.
Businesses with annual aggregate turnover of ₹5 crore or more must report at least 6 digits on e-invoices and e-way bills; below ₹5 crore, 4 digits is the B2B minimum. Exports require 8 digits.
Every line item on a GST tax invoice carries its HSN code alongside the description, quantity, taxable value, and tax breakup. The code also flows into your GSTR-1 HSN summary and e-way bills.

Related tools & guides

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