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Aromatic building blocks

2-Nitrobenzidine

Also known as Benzidine, 2-nitro-, 2-Nitrobenzidin, 4,4'-Diamino-2-nitrobiphenyl

CAS 2243-78-9Formula C12H11N3O2Molar mass 229.24 g/molEC 683-703-0
GHS signal word: Warning. Pictograms: Harmful or irritant
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2-Nitrobenzidine chemical structure, C12H11N3O2, CAS 2243-78-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2243-78-9
Formula
C12H11N3O2
Molar mass
229.24 g/mol
EC number
683-703-0
HS code
292159
Category
Aromatic building blocks

What is 2-Nitrobenzidine?

Plain description, key identifiers and synonyms

2-Nitrobenzidine is a chemical substance with the molecular formula C12H11N3O2 and a molar mass of 229.24 g/mol. Its CAS registry number is 2243-78-9. The IUPAC name is 4-(4-aminophenyl)-3-nitroaniline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-(4-aminophenyl)-3-nitroaniline
CAS number
2243-78-9 CAS number cross-checked
EC number
683-703-0
Molecular formula
C12H11N3O2
UNII
C104KU8407
InChIKey
YYNCOERMULFLJD-UHFFFAOYSA-N
InChI
InChI=1S/C12H11N3O2/c13-9-3-1-8(2-4-9)11-6-5-10(14)7-12(11)15(16)17/h1-7H,13-14H2
SMILES (canonical and isomeric)
C1=CC(=CC=C1C2=C(C=C(C=C2)N)[N+](=O)[O-])N

Synonyms

  • Benzidine, 2-nitro-
  • 2-Nitrobenzidin
  • 4,4'-Diamino-2-nitrobiphenyl
  • 3-13-00-00449 (Beilstein Handbook Reference)
  • 2-Nitro(1,1'-biphenyl)-4,4'-diamine
  • (1,1'-Biphenyl)-4,4'-diamine, 2-nitro-
  • 2-Nitro[1,1'-biphenyl]-4,4'-diamine
  • 4-(4-aminophenyl)-3-nitroaniline
  • Nitrobenzidin
  • 2-Nitro-[1,1'-biphenyl]-4,4'-diamine
  • [1,1'-Biphenyl]-4,4'-diamine,2-nitro-

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
229.24 g/molcalc.
Exact mass
229.0851 Dacalc.
LogP (octanol/water)
2.43calc.
Topological polar surface area
95.18 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, c1ccc(-c2ccccc2)cc1

c1ccc(-c2ccccc2)cc1

2 rings, 12 atoms, the Biphenyl ring system.

32,228 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
  • H319Causes serious eye irritation.
Precautionary statements (9)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

2-Nitrobenzidine suppliers

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2-Nitrobenzidine price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 2-Nitrobenzidine is traded under.

HS 2921.59Indicative HS code

Aromatic polyamines and their derivatives, salts thereof, other

World exports in 2024
$510M
−0.4% vs 2023, imports $488M
2019 to 2024
Top exporters
  1. China26.6%
  2. Japan16.6%
  3. India * partner reported12.4%
Top importers
  1. United States17.9%
  2. Germany11.6%
  3. South Korea7.4%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

The HS code shown for 2-Nitrobenzidine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 2-Nitrobenzidine, based on the data on this page

What is 2-Nitrobenzidine?

2-Nitrobenzidine is a chemical substance with the molecular formula C12H11N3O2 and a molar mass of 229.24 g/mol. Its CAS registry number is 2243-78-9. The IUPAC name is 4-(4-aminophenyl)-3-nitroaniline.

What is the CAS number of 2-Nitrobenzidine?

The CAS registry number of 2-Nitrobenzidine is 2243-78-9.

What is the molecular formula and weight of 2-Nitrobenzidine?

The molecular formula of 2-Nitrobenzidine is C12H11N3O2 and its molar mass is 229.24 g/mol.

What is 2-Nitrobenzidine used for?

Known uses and roles of 2-Nitrobenzidine include building blocks in research and laboratory and screening compounds in research and laboratory.

Is 2-Nitrobenzidine hazardous?

2-Nitrobenzidine carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of 2-Nitrobenzidine?

2-Nitrobenzidine is usually classified under HS code 292159 (Aromatic polyamines and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 2-Nitrobenzidine?

Post a free request on CompoundList and suppliers of 2-Nitrobenzidine will send you quotes. Your contact details stay private until you accept a quote.

What is the price of 2-Nitrobenzidine?

Suppliers quote 2-Nitrobenzidine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle 2-Nitrobenzidine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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