1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro-CAS 25747-08-4 · import duty, licences and trade rules in India

C20H13N3O7S · also called 3-Hydroxy-4-((1-hydroxy-2-naphthalenyl)azo)-7-nitro-1-naphthalenesulfonic acid, 3-Hydroxy-4-((1-hydroxy-2-naphthyl)azo)-7-nitronaphthalene-1-sulphonic acid, 1-Naphthalenesulfonic acid, 3-hydroxy-4-(2-(1-hydroxy-2-naphthalenyl)diazenyl)-7-nitro-, 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitronaphthalene-1-sulphonic acid
No ban or licence needed. Normal trade rules apply; handle as its safety advice says.
Import dutyOKAbout 27.73%HS 2927 (estimate)Rules in IndiaOKNo special Indian ban or licence foundExportOKNo export licence neededSafetyCHECKHazardous: take normal precautions

4-[(1-hydroxy-2-naphthalenyl)hydrazinylidene]-7-nitro-3-oxo-1-naphthalenesulfonic acid is a nitronaphthalene. For trade in India: No ban or licence needed. Normal trade rules apply; handle as its safety advice says. Import duty is about 27.73% (tariff item 2927 (estimate)).

Checked 2026-11-12 against official Indian and international lists. Sources are given under each answer.

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Every answer, with its source

Rules in IndiaOK

No special Indian ban or licence found
  • Not on the Indian banned-pesticide, drug-precursor, narcotic, psychotropic or new-drug lists we check.
  • Normal factory, storage and GST rules still apply.
Source: CIB&RC pesticide lists · CDSCO new drug approvals · NDPS RCS Order 2013

Exporting from IndiaOK

No export licence needed
  • Not on the SCOMET export-control list or the precursor export list.
  • The buyer’s country may still have its own import rules.
Source: DGFT SCOMET list · NDPS RCS Order 2013

Global treaties & export marketsOK

No treaty or export-market restriction found
  • Not listed by the Stockholm Convention (persistent pollutants), the Rotterdam Convention (prior consent before export) or the Montreal Protocol (ozone layer).
  • No EU REACH registration found: an EU importer (or your only representative) must register it before importing a tonne or more a year. Medicines and pesticide actives follow their own EU rules.
  • Active on the US TSCA Inventory, so it can be imported into the US without a new-chemical notice.
Source: Stockholm Convention, all listed POPs · Rotterdam Convention Annex III · Montreal Protocol annexes (ozone layer, Kigali HFCs) · US EPA TSCA Inventory · ECHA REACH lists, as published in PubChem

Import dutyOK

About 27.73% of the import value (estimate)
  • About ₹27,730 duty on every ₹1,00,000 of import value (CIF).
  • No tariff line names this chemical, so we worked out its likely heading from its structure: 2927, diazo-, azo- or azoxy-compounds (azo or diazo group).
  • All lines under heading 2927 pay basic customs duty 7.5%; with social welfare surcharge and IGST 18% that makes about 27.73%.
  • No 8-digit line under heading 2927 names it, so it falls under one of its "Other" lines: 2927 00 90 (Diazo-, azo- or azoxy- compounds › Other). The other 1 lines are for named chemicals; which "Other" line applies depends on the exact structure.
  • Confirm the exact 8-digit code with your customs broker before you import.
Source: Customs Tariff of India, CBIC · Notification 45/2025-Customs · Notification 02/2026-Customs (Budget 2026) · Finance Act 2026, Fifth Schedule (tariff rates from 1 May 2026) · Notification 9/2025-Integrated Tax (Rate)

SafetyCHECK

Hazardous: take normal precautions
  • Irritates skin, eyes or breathing
  • Causes serious eye irritation
  • Harmful to aquatic life with long lasting effects
  • Always read the supplier’s safety data sheet (SDS) before handling.
Source: PubChem GHS classification

Price and suppliersNO DATA

Not on RasayanXchange yet
  • Post a requirement and we will find suppliers for you.
Source: RasayanXchange market data

Key facts

CAS number25747-08-4
FormulaC20H13N3O7S
Also called3-Hydroxy-4-((1-hydroxy-2-naphthalenyl)azo)-7-nitro-1-naphthalenesulfonic acid, 3-Hydroxy-4-((1-hydroxy-2-naphthyl)azo)-7-nitronaphthalene-1-sulphonic acid, 1-Naphthalenesulfonic acid, 3-hydroxy-4-(2-(1-hydroxy-2-naphthalenyl)diazenyl)-7-nitro-, 3-hydroxy-4-[(1-hydroxy-2-naphthyl)azo]-7-nitronaphthalene-1-sulphonic acid
Tariff item (HS)2927 (estimate)
Total import dutyabout 27.73%
Anti-dumping duty (most producers)None found
SCOMET (export control)Not listed
NDPS / precursorNot listed

Questions about 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro-

What is the import duty on 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- in India?

The total import duty on 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- is about 27.73% of the import value under tariff item 2927 (estimate), including basic customs duty, the social welfare surcharge and IGST. Check the latest notifications before you import.

Is there anti-dumping duty on 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro-?

No anti-dumping duty on 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- was found in the Customs (ADD) notifications in force.

What is the HS code (tariff item) of 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- in India?

1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- falls under tariff item 2927 (estimate) of the Customs Tariff of India.

Is 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- restricted or licensed in India?

No special Indian ban or licence found. Not on the Indian banned-pesticide, drug-precursor, narcotic, psychotropic or new-drug lists we check. Normal factory, storage and GST rules still apply.

Does exporting 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- from India need a licence?

No export licence needed. Not on the SCOMET export-control list or the precursor export list.

Is 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- hazardous?

Hazardous: take normal precautions. Irritates skin, eyes or breathing. Causes serious eye irritation. Harmful to aquatic life with long lasting effects.

Is 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(1-hydroxy-2-naphthalenyl)diazenyl]-7-nitro- regulated under global treaties or in the EU and US?

No treaty or export-market restriction found. Not listed by the Stockholm Convention (persistent pollutants), the Rotterdam Convention (prior consent before export) or the Montreal Protocol (ozone layer). No EU REACH registration found: an EU importer (or your only representative) must register it before importing a tonne or more a year. Medicines and pesticide actives follow their own EU rules.

1,1'-Azobis(cyclohexanecarbonitrile)1,3-naphthalenedisulfonic acid, 7-hydroxy-8-((4-(phenylazo)phenyl)azo)-, disodium salt1-[2-[4-[2-(2,5-Dimethylphenyl)diazenyl]-2,5-dimethylphenyl]diazenyl]-2-naphthalenol1-Methyl-3-p-tolyltriazene1-Naphthalenamine, 4-(phenylazo)-1-Naphthalenesulfonic acid, 3-hydroxy-4-((2-hydroxy-1-naphthalenyl)azo)-, monosodium salt1-Naphthalenol, 4-[2-(4-nitrophenyl)diazenyl]-2,2'-Azobis(2,4-dimethylvaleronitrile)2,2'-Azobis(2-methylbutyronitrile)2,2'-Azobis(2-methylpropanimidamide) dihydrochloride2,2'-Azobisphenol2,4-Diaminoazobenzene

Guidance from official lists, not legal advice. Rules change; confirm with DGFT, customs or the regulator before you trade.