Other

Phenylenediamine derivatives, diaminotoluenes and their salts

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 17450 · CIB&RC OVERLAY · NDPS OVERLAY

HSN 2921 51 90 (other phenylenediamine derivatives, diaminotoluenes and their salts) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 17450:2020 is mandatory under the ISI Mark Scheme with effect from 28 October 2022, by virtue of the 1,3-Phenylenediamine (Quality Control) Order, 2022. Directorate General of Foreign Trade policy controls on narcotic, psychotropic, and chemical-weapons-convention-scheduled substances apply as separate customs-clearance overlays.

What this is

HSN code

2921 51 90

Chapter

29 · Organic chemicals

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 17450:2020 · effective 28-10-2022

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

CIB&RCCIB&RC·Central Insecticides Board and Registration Committee

NDPSNDPS·Narcotics Control Bureau

Procedural directions for customs clearance are issued by: Central Board of Indirect Taxes and Customs, Directorate General of Foreign Trade.

Compliance steps

1
Source only from a Bureau of Indian Standards CM/L-licensed manufacturer holding a current licence against IS 17450:2020. Verify the supplier's CM/L number, licensed product scope, and manufacturing facility address on the BIS online register before placing the purchase order.
1,3-Phenylenediamine (Quality Control) Order, 2022 · S.O. 1960(E) dated 27-04-2022 · Scheme-I of Schedule-II of the BIS (Conformity Assessment) Regulations, 2018
2
Ensure the product bears the ISI mark and the supplier's CM/L number under Scheme-I of Schedule-II of the BIS (Conformity Assessment) Regulations, 2018. Marking must appear on the product or its primary packaging, not on outer shipping cartons alone.
Scheme-I of Schedule-II of the BIS (Conformity Assessment) Regulations, 2018 · 1,3-Phenylenediamine (Quality Control) Order, 2022
3
If the consignment contains substances scheduled under the Chemical Weapons Convention (nitrogen mustards; 2-chloro-N,N-diisopropylethylamine and related protonated salts), obtain the required permission from the National Authority and verify the exporting country is a State Party to the CWC before shipment.
Appendix II to Schedule I (Category 1A and Category 1B) of ITC (HS) Import Policy · Chapter 29 policy conditions
4
If the consignment includes NDPS-scheduled substances, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 for medical and scientific purposes; consignments outside that category are governed by Appendix I to the ITC (HS) Schedule.
Chapter VII-A of the NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
5
Submit mandatory additional qualifiers in the import declaration for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus. Quote the BIS CM/L number on the bill of entry; customs verifies the CM/L against the BIS register in real time, and an absent, expired, or scope-mismatched licence triggers consignment detention.
CBIC Circular 23/2023-Cus dated 30-09-2023 · BIS Act, 2016 · Customs Act, 1962

A word of counsel

The most common error on this tariff line is treating the BIS QCO as applicable only to 1,3-phenylenediamine while overlooking that the CM/L must specifically cover the derivative or salt variant actually being imported. IS 17450:2020 governs a defined specification; a CM/L issued for one isomer or salt form does not extend to a structurally related but separately specified compound in the same subheading. A scope mismatch between the CM/L and the actual chemical identity of the consignment triggers detention and potentially re-export, even where the licence is otherwise valid and current.

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Frequently asked

Does HSN 2921 51 90 require BIS certification?

Yes. Goods falling within the 1,3-Phenylenediamine (Quality Control) Order, 2022 must conform to IS 17450:2020 and bear the ISI mark under a CM/L licence from the Bureau of Indian Standards, with effect from 28 October 2022.

Are there additional regulatory clearances beyond BIS for chemicals under this HSN?

Yes. CWC-scheduled substances require permission from the National Authority and must originate in a State Party; NDPS-scheduled substances require an import certificate under Rule 53 of the NDPS Rules, 1985; and pesticide-scheduled substances require registration and a permit from the Central Insecticides Board and Registration Committee.

Does the BIS QCO under IS 17450:2020 apply to all phenylenediamine derivatives and salts under this residual tariff line?

The CCR explicitly references IS 17450:2020 in the context of 1,3-phenylenediamine specification. Derivatives and salts outside that specification that fall into the residual CTI should be evaluated against the licensed scope of the supplier's CM/L before import.

Is a CM/L licence facility-specific and product-specific?

Yes. A CM/L licence is issued to a specific manufacturing facility for a specific product specification; chemicals produced at an unlicensed plant, or falling outside the licensed specification, are not covered by the same CM/L.

Last verified against gazette notifications: 2026-05-18. Source: BIS / CIB&RC / NDPS / DGFT / CBIC / Indian Customs CUSDATA.