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Dye intermediates

3,3'-Dicarboxybenzidine

Also known as Benzidine-3,3'-dicarboxylic acid, 4,4'-diaminobiphenyl-3,3'-dicarboxylic acid, 5,5'-Bianthranilic acid

CAS 2130-56-5Formula C14H12N2O4Molar mass 272.26 g/molEC 218-348-9
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3,3'-Dicarboxybenzidine chemical structure, C14H12N2O4, CAS 2130-56-5
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2130-56-5
Formula
C14H12N2O4
Appearance
White crystals
Solubility
Sol in alcohol, ether, insol in water
HS code
292249
Category
Dye intermediates
Illustrative photo, colourless crystals in an open woven sack in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is 3,3'-Dicarboxybenzidine?

Plain description, key identifiers and synonyms

3,3'-Dicarboxybenzidine is a chemical substance with the molecular formula C14H12N2O4 and a molar mass of 272.26 g/mol. Its CAS registry number is 2130-56-5. The IUPAC name is 2-amino-5-(4-amino-3-carboxyphenyl)benzoic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-amino-5-(4-amino-3-carboxyphenyl)benzoic acid
CAS number
2130-56-5 CAS number cross-checked
EC number
218-348-9
Molecular formula
C14H12N2O4
UNII
PLU8S18T9F
MDL number
MFCD00045837
InChIKey
IIQLVLWFQUUZII-UHFFFAOYSA-N
InChI
InChI=1S/C14H12N2O4/c15-11-3-1-7(5-9(11)13(17)18)8-2-4-12(16)10(6-8)14(19)20/h1-6H,15-16H2,(H,17,18)(H,19,20)
SMILES (canonical and isomeric)
C1=CC(=C(C=C1C2=CC(=C(C=C2)N)C(=O)O)C(=O)O)N

Synonyms

  • Benzidine-3,3'-dicarboxylic acid
  • 4,4'-diaminobiphenyl-3,3'-dicarboxylic acid
  • 5,5'-Bianthranilic acid
  • 5,5'-Dianthranilic acid
  • 3,3'-Benzidinedicarboxylic acid
  • Benzidine-M,M'-dicarboxylic acid
  • 3,3'-dicarboxy-4,4'-diaminobiphenyl
  • 4,4'-Diamino-3,3'-biphenyldicarboxylic acid
  • Kwas benzydynodwukaroksylowy
  • 3,3'-Biphenyldicarboxylic acid, 4,4'-diamino-
  • (1,1'-Biphenyl)-3,3'-dicarboxylic acid, 4,4'-diamino-
  • [1,1'-Biphenyl]-3,3'-dicarboxylic acid, 4,4'-diamino-
  • 2-14-00-00345 (Beilstein Handbook Reference)
  • 1,1'-Biphenyl)-3,3'-dicarboxylic acid, 4,4'-diamino-
  • 5,5'Bianthranilic acid
  • 5,5'Dianthranilic acid
  • Benzidinem,m'dicarboxylic acid
  • 3,3'Benzidinedicarboxylic acid
  • Benzidine3,3'dicarboxylic acid
  • 4,4'Diamino3,3'biphenyldicarboxylic acid
  • 3,3'Biphenyldicarboxylic acid, 4,4'diamino
  • (1,1'Biphenyl)3,3'dicarboxylic acid, 4,4'diamino
  • 4,4'-Diamino-[1,1'-biphenyl]-3,3'-dicarboxylic acid
  • 2-amino-5-(4-amino-3-carboxyphenyl)benzoic acid
  • Cambridge id 5180176
Show all 31 synonyms
  • benzidine-3,3' -dicarboxylic acid
  • 2-amino-5-(4-amino-3-carboxy-phenyl)benzoic acid
  • 4,4'-Diamino[1,1'-biphenyl]-3,3'-dicarboxylic acid
  • 4,4'-Diamino-[1,1'-biphenyl]-3,3'-dicarboxylicacid
  • 3,3 inverted exclamation marka-Dicarboxy-4,4 inverted exclamation marka-diaminobiphenyl
  • 4,4 inverted exclamation mark -Diamino-[1,1 inverted exclamation mark -biphenyl]-3,3 inverted exclamation mark -dicarboxylic Acid

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

Appearance
White crystalsexp.
Solubility
Sol in alcohol, ether, insol in waterexp.

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
272.26 g/molcalc.
Exact mass
272.0797 Dacalc.
LogP (octanol/water)
1.91calc.
Topological polar surface area
126.6 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
20calc.
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

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

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

3,3'-Dicarboxybenzidine suppliers

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3,3'-Dicarboxybenzidine 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

Dyestuff.

Used for the manufacture of azo dyes containing copper.

How it is made

By boiling meta-nitrobenzaldehyde with caustic soda, reducing with zinc dust and acidifying.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Inactive in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code 3,3'-Dicarboxybenzidine is traded under.

HS 2922.49Indicative HS code

Amino-acids, other than those containing more than one kind of oxygen function, and…

World exports in 2024
$3.88B
−11.5% vs 2023, imports $3.87B
2019 to 2024
Top exporters
  1. China38.7%
  2. India * partner reported8.3%
  3. Germany8.1%
Top importers
  1. United States13.4%
  2. Germany11.1%
  3. Japan6.6%

* Partner reported figures, a lower bound.

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

The HS code shown for 3,3'-Dicarboxybenzidine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about 3,3'-Dicarboxybenzidine, based on the data on this page

What is 3,3'-Dicarboxybenzidine?

3,3'-Dicarboxybenzidine is a chemical substance with the molecular formula C14H12N2O4 and a molar mass of 272.26 g/mol. Its CAS registry number is 2130-56-5. The IUPAC name is 2-amino-5-(4-amino-3-carboxyphenyl)benzoic acid.

What is the CAS number of 3,3'-Dicarboxybenzidine?

The CAS registry number of 3,3'-Dicarboxybenzidine is 2130-56-5.

What is the molecular formula and weight of 3,3'-Dicarboxybenzidine?

The molecular formula of 3,3'-Dicarboxybenzidine is C14H12N2O4 and its molar mass is 272.26 g/mol.

What is 3,3'-Dicarboxybenzidine used for?

Dyestuff. Used for the manufacture of azo dyes containing copper.

Is 3,3'-Dicarboxybenzidine hazardous?

No GHS hazard classification for 3,3'-Dicarboxybenzidine is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of 3,3'-Dicarboxybenzidine?

3,3'-Dicarboxybenzidine is usually classified under HS code 292249 (Amino-acids, other than those containing more than one kind of oxygen function, and…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy 3,3'-Dicarboxybenzidine?

Post a free request on CompoundList and suppliers of 3,3'-Dicarboxybenzidine will send you quotes. Your contact details stay private until you accept a quote.

What is the price of 3,3'-Dicarboxybenzidine?

Suppliers quote 3,3'-Dicarboxybenzidine 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 3,3'-Dicarboxybenzidine

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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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