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Aromatic building blocks

Benzidine sulfate

Also known as Benzidine, sulfate (1:1), (1,1'-Biphenyl)-4,4'-diamine, sulfate (1:1), [[1,1'-biphenyl]-4,4'-diyl]diammonium sulphate

CAS 531-86-2Formula C12H14N2O4SMolar mass 282.32 g/molEC 208-520-1
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment
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Benzidine sulfate chemical structure, C12H14N2O4S, CAS 531-86-2
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
531-86-2
Formula
C12H14N2O4S
Molar mass
282.32 g/mol
EC number
208-520-1
HS code
292159
Category
Aromatic building blocks

What is Benzidine sulfate?

Plain description, key identifiers and synonyms

Benzidine sulfate is a chemical substance with the molecular formula C12H14N2O4S and a molar mass of 282.32 g/mol. Its CAS registry number is 531-86-2. The IUPAC name is 4-(4-aminophenyl)aniline, sulfuric acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-(4-aminophenyl)aniline, sulfuric acid
CAS number
531-86-2 CAS number cross-checkedOther or deprecated CAS: 21136-70-9
EC numbers
208-520-1, 244-236-4
Molecular formula
C12H14N2O4S
UNII
7T261S779O
InChIKey
ZOXJIQNURSAHRV-UHFFFAOYSA-N
InChI
InChI=1S/C12H12N2.H2O4S/c13-11-5-1-9(2-6-11)10-3-7-12(14)8-4-10;1-5(2,3)4/h1-8H,13-14H2;(H2,1,2,3,4)
SMILES (canonical and isomeric)
C1=CC(=CC=C1C2=CC=C(C=C2)N)N.OS(=O)(=O)O

Synonyms

  • Benzidine, sulfate (1:1)
  • (1,1'-Biphenyl)-4,4'-diamine, sulfate (1:1)
  • [[1,1'-biphenyl]-4,4'-diyl]diammonium sulphate
  • (1,1'-Biphenyl)-4,4'-diamine, sulfate
  • [1,1'-Biphenyl]-4,4'-diamine, sulfate
  • [1,1'-Biphenyl]-4,4'-diamine, sulfate (1:1)
  • ((1,1'-Biphenyl)-4,4'-diyl)diammonium sulphate
  • Benzidine, sulfate (1:1) (8CI)
  • (1,1'-Biphenyl)-4,4'-diamine, sulfate (1:1) (9CI)
  • 4-(4-aminophenyl)aniline, sulfuric acid
  • 4,4'-Diaminodiphenylene sulfate
  • [1,4'-diamine, sulfate (1:1)

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
282.32 g/molcalc.
Exact mass
282.0674 Dacalc.
LogP (octanol/water)
1.87calc.
Topological polar surface area
126.6 Ųcalc.
Hydrogen bond donors
4calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
1calc.
Heavy atoms
19calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
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
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H350May cause cancer.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (11)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P330Rinse mouth.
  • P391Collect spillage.
  • P405Store locked up.
  • 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

Benzidine sulfate suppliers

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Benzidine sulfate 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

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-070-00-5[2]

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: [[1,1'-Biphenyl]-4,4'-diyl]diammonium sulphate, Ref no: 714, Annex ref: II/714

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Benzidine sulfate 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 Benzidine sulfate is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Benzidine sulfate, based on the data on this page

What is Benzidine sulfate?

Benzidine sulfate is a chemical substance with the molecular formula C12H14N2O4S and a molar mass of 282.32 g/mol. Its CAS registry number is 531-86-2. The IUPAC name is 4-(4-aminophenyl)aniline, sulfuric acid.

What is the CAS number of Benzidine sulfate?

The CAS registry number of Benzidine sulfate is 531-86-2. Other or deprecated CAS numbers: 21136-70-9.

What is the molecular formula and weight of Benzidine sulfate?

The molecular formula of Benzidine sulfate is C12H14N2O4S and its molar mass is 282.32 g/mol.

What is Benzidine sulfate used for?

Known uses and roles of Benzidine sulfate include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Benzidine sulfate hazardous?

Benzidine sulfate carries the GHS signal word "Danger". Main hazards: harmful if swallowed, may cause cancer, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Benzidine sulfate?

Benzidine sulfate 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 Benzidine sulfate?

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What is the price of Benzidine sulfate?

Suppliers quote Benzidine sulfate 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 Benzidine sulfate

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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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