Ammonium alum

Ammonium alum, an inorganic alum salt

CBIC CLEARANCE

HSN 2833 30 10 (Ammonium alum) is subject to Central Board of Indirect Taxes and Customs (CBIC) mandatory additional-qualifier requirements under CBIC Circular 23/2023-Cus dated 30-09-2023, operative with effect from 15 October 2023. Importers must furnish the Chapter 28 mandatory qualifiers at the bill-of-entry stage as stipulated in paragraphs 4.1 and 4.2 of that Circular.

What this is

HSN code

2833 30 10

Chapter

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

Primary regulator

CBIC · Customs Act, 1962 — Chapter 28 mandatory qualifiers per CBIC Circular 23/2023-Cus

Customs documentation

Chapter 28 qualifiers from CBIC
Import declaration to CBIC

Compliance steps

1
At the time of filing the bill of entry, furnish all mandatory additional qualifiers for Chapter 28 commodities as prescribed in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus. These qualifiers must appear in the import declaration for ammonium alum falling under CTH 2833 30 10.
CBIC Circular 23/2023-Cus dated 30-09-2023, paragraphs 4.1 and 4.2, effective 15-10-2023
2
Verify that the importer's internal documentation — including supplier invoices, certificates of analysis, and country-of-origin certificates — accurately reflects the qualifier values declared at the bill of entry. Inconsistency between uploaded documents and declared qualifiers triggers reassessment and potential detention.
CBIC Circular 23/2023-Cus dated 30-09-2023

A word of counsel

The most common error on this tariff line is filing the bill of entry without completing the Chapter 28 mandatory qualifiers introduced by CBIC Circular 23/2023-Cus — treating ammonium alum as a routine inorganic salt that passes through on a standard declaration. The qualifier requirement has applied since 15 October 2023 and an incomplete declaration causes out-of-charge to be withheld pending reassessment, accruing demurrage and ground rent at the port.

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Frequently asked

Does HSN 2833 30 10 require BIS certification?

No, ammonium alum is not covered by any BIS Quality Control Order. The operative compliance requirement is the Central Board of Indirect Taxes and Customs mandatory additional-qualifier declaration under CBIC Circular 23/2023-Cus dated 30-09-2023, effective 15 October 2023.

What exactly are the Chapter 28 mandatory qualifiers required for this tariff line?

Paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus prescribe the specific additional qualifier fields for commodities under Chapter 28; the importer must populate those fields in the import declaration at the bill-of-entry stage before out-of-charge is granted.

Does the qualifier requirement under CBIC Circular 23/2023-Cus apply to all Chapter 28 imports or only selected CTHs?

The Circular applies to commodities under Chapters 28, 29, 32, 39 and CTH 3808 as a group; ammonium alum at CTH 2833 30 10 falls within Chapter 28 and is therefore subject to the requirement with effect from 15 October 2023.

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