Carbon monoxide
Carbon monoxide, inorganic oxygen compound of non-metals
CBIC CLEARANCE
HSN 2811 29 40 (Carbon monoxide) 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. With effect from 15 October 2023, import declarations for Chapter 28 commodities must include the stipulated qualifiers at paragraphs 4.1 and 4.2 of that Circular.
Chapter
28 · Inorganic chemicals; organic or inorganic compounds of precious metals
Primary regulator
CBIC · CBIC Circular 23/2023-Cus (Chapter 28 mandatory qualifiers)
Customs documentation
- Chapter 28 qualifiers from CBIC
- Import declaration to CBIC
- 1
Include all mandatory additional qualifiers stipulated at paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus in the import declaration at the bill-of-entry stage. This requirement applies to all Chapter 28 commodities with effect from 15 October 2023.
CBIC Circular 23/2023-Cus dated 30-09-2023, paragraphs 4.1 and 4.2
The most common error on this tariff line is filing the bill of entry without the Chapter 28 additional qualifiers, treating carbon monoxide as a low-scrutiny inorganic gas. CBIC Circular 23/2023-Cus applies uniformly to all commodities under Chapters 28, 29, 32, 39 and CTH 3808 from 15 October 2023; a declaration missing the paragraphs 4.1 and 4.2 qualifiers will be queried by the assessing officer, causing consignment detention and demurrage.
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Speak to an Expert → Does HSN 2811 29 40 require BIS certification?
No, carbon monoxide is not within the BIS Quality Control Order regime. Import is governed by Central Board of Indirect Taxes and Customs mandatory additional-qualifier requirements under CBIC Circular 23/2023-Cus dated 30-09-2023, operative for all Chapter 28 import declarations from 15 October 2023.
What are the mandatory qualifiers required under CBIC Circular 23/2023-Cus for this HSN?
The stipulated qualifiers are set out at paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus dated 30-09-2023, which covers commodities under Chapters 28, 29, 32, 39 and CTH 3808.
From what date do the Chapter 28 additional-qualifier requirements apply?
The mandatory additional-qualifier requirements under CBIC Circular 23/2023-Cus took effect from 15 October 2023 for all import declarations covering Chapter 28 commodities including carbon monoxide.
Last verified against gazette notifications: 2026-05-16. Source: CBIC / Indian Customs CUSDATA.