About HSN Code 251820

HSN Code 251820 covers Calcined or Sintered Dolomite and attracts a GST rate of 5%. For intra-state supplies, this is split as 2.5% CGST + 2.5% SGST. For inter-state supplies, 5% IGST is charged. This code falls under the Chemicals & Materials sector (Paint, fertilizer, rubber, plastics, pharma).

How to Use HSN Code 251820 on GST Invoices

• Include the HSN code 251820 on every GST invoice for calcined or sintered dolomite
• 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

• 251810 — Dolomite not Calcined or Sintered
• 25181000 — Dolomite not Calcined or Sintered
• 25182000 — Calcined or Sintered Dolomite
• 25183000 — Dolomite, Whether or not Calcined or Sintered, Including Dolomite Roughly Trimmed or Merely Cut, by Sawing or Otherwise, Into Blocks or Slabs of a Rectangular (including Square) Shape; Dolomite Ramming Mix -dolomite Ramming Mix

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Last verified: 2026-06-26 · Source: CBIC Master Tariff