Sulphonitric acids

Sulphonitric acids, mixed nitric and sulphuric acids

CBIC CLEARANCE

HSN 2808 00 20 (Sulphonitric acids) is subject to mandatory additional qualifier declarations in import filings under CBIC Circular 23/2023-Cus dated 30-09-2023, operative from 15 October 2023 for all commodities under Chapter 28. The Directorate General of Foreign Trade (DGFT) ITC (HS) import policy applies as the governing trade-policy overlay.

What this is

HSN code

2808 00 20

Chapter

28 · Inorganic chemicals; organic or inorganic compounds of precious metals

Primary regulator

CBIC · CBIC Circular 23/2023-Cus dated 30-09-2023 (Chapter 28 mandatory qualifiers)

Customs documentation

Chapter 28 qualifiers from CBIC
Import declaration from CBIC

Compliance steps

1
File the bill of entry with all mandatory additional qualifiers for Chapter 28 commodities as stipulated in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus. These qualifiers must appear in the import declaration before the bill is assessed; omission triggers a deficiency notice and detention of the consignment.
CBIC Circular 23/2023-Cus dated 30-09-2023, paragraphs 4.1 and 4.2, with effect from 15-10-2023
2
Confirm that the ITC (HS) import policy status for this tariff line is Free before shipment, and retain the commercial invoice and certificate of analysis from the foreign supplier to support the qualifier declarations at the bill-of-entry stage.
ITC (HS) Schedule I, Chapter 28

A word of counsel

The most common error on this tariff line is filing the bill of entry without the Chapter 28 mandatory qualifiers required under paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus — a deficiency that is not curable after assessment and results in consignment detention and demurrage until a revised declaration is accepted. The qualifier regime applies uniformly to Chapters 28, 29, 32, 39 and CTH 3808; importers handling mixed shipments across those chapters must ensure each line item carries the correct qualifier set independently.

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Frequently asked

Does HSN 2808 00 20 require BIS certification?

No; no BIS Quality Control Order covers sulphonitric acids. Import is governed by the mandatory additional qualifier declaration regime under CBIC Circular 23/2023-Cus dated 30-09-2023, which applies to all Chapter 28 commodity import declarations with effect from 15 October 2023.

What are the mandatory qualifiers required at the bill of entry for Chapter 28 commodities?

Paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus specify the qualifier fields; importers should refer to the circular directly to identify the exact fields applicable to their specific commodity line.

Does the Chapter 28 qualifier requirement apply only to sulphonitric acids or to other chemicals in the same shipment?

The requirement applies to all commodities under Chapters 28, 29, 32, 39 and CTH 3808; every line item in a mixed-chemical shipment falling under those chapters must carry its own compliant qualifier declaration per CBIC Circular 23/2023-Cus.

Last verified against gazette notifications: 2026-05-16. Source: CBIC / Indian Customs CUSDATA.