CompoundList
Sign in
Impurities and reference standards

Hydrazobenzene

Also known as 1,2-Diphenylhydrazine, Hydrazine, 1,2-diphenyl-, N,N'-Bianiline

CAS 122-66-7Formula C12H12N2Molar mass 184.24 g/molEC 204-563-5
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 12 suppliers listed
Get quotes Compare 12 suppliers
Hydrazobenzene chemical structure, C12H12N2, CAS 122-66-7
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Tablets from alcohol and ether
Melting point
131 °C
Boiling point
293 °C
Density
1.16 g/cm³
Solubility
In water, 221 mg/L at 25 °C
HS code
292800
Category
Impurities and reference standards
UN number
UN 2811
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Hydrazobenzene?

Plain description, key identifiers and synonyms

Hydrazobenzene is a colorless, crystalline compound that emits toxic fumes of nitrogen oxides when heated to decomposition. Hydrazobenzene has been used primarily in the dye manufacturing industry as the precursor of the dye intermediate benzidine and is also used as an intermediate in the manufacture of pharmaceuticals. Exposure to this substance irritates the skin, nose, throat and lungs and can eventually lead to liver, kidney and brain damage. Hydrazobenzene is reasonably anticipated to be a human carcinogen based on evidence of carcinogenicity in experimental animals. (NCI05)

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1,2-diphenylhydrazine
CAS number
122-66-7 CAS number cross-checkedOther or deprecated CAS: 38622-18-3
EC number
204-563-5
Molecular formula
C12H12N2
UNII
1G3CS09TUK
MDL number
MFCD00003012
InChIKey
YBQZXXMEJHZYMB-UHFFFAOYSA-N
InChI
InChI=1S/C12H12N2/c1-3-7-11(8-4-1)13-14-12-9-5-2-6-10-12/h1-10,13-14H
SMILES (canonical and isomeric)
C1=CC=C(C=C1)NNC2=CC=CC=C2

Synonyms

  • 1,2-Diphenylhydrazine
  • Hydrazine, 1,2-diphenyl-
  • N,N'-Bianiline
  • N,N'-Diphenylhydrazine
  • Hydrazobenzen
  • Benzene, hydrazodi-
  • (sym)-Diphenylhydrazine
  • Benzene, 1,1'-hydrazobis-
  • 1,1'-Hydrazodibenzene
  • Symmetrical diphenyl hydrazine
  • hydrazodibenzene
  • n,n-Bianiline
  • 1,1-Hydrazodibenzene
  • RCRA waste number U109
  • Phenylbutazone EP Impurity C
  • Diphenylhydrazine
  • 1,2-diphenyldiazane
  • Diphenylhydrazine, 1,2-
  • Hydrazine, diphenyl-
  • 1,2-Diphenyldiazane (1,2-Diphenylhydrazine)
  • hydrazobenzol
  • 1,2-Diphenylhydrazine (9CI)
  • 1,2-Diphenyldiazane, Phenylbutazone Imp. C (EP), 1,2-Diphenylhydrazine, Phenylbutazone Impurity C
  • HydraZobenZene,98%
  • Hydrazine,2-diphenyl-
Show all 36 synonyms
  • N,N'-biphenylhydrazine
  • 1,2-diphenyl-hydrazine
  • Benzene,1'-hydrazobis-
  • sym-DIPHENYLHYDRAZINE
  • Mr-II-10
  • 4-15-00-00056 (Beilstein Handbook Reference)
  • Ybqzxxmejhzymb-uhfffaoysa-
  • Hydrazobenzene(Discontinued,See C4X-25652)
  • Phenylbutazone impurity c
  • 38622-18-3, 530-50-7(1,1-diphenylhydrazine)
  • 1,2-Diphenylhydrazine, analytical standard, ampule of 100 mg

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
Tablets from alcohol and etherexp.
Melting point
131 °Cexp.
Boiling point
293 °Cexp.
Density
1.16 g/cm³exp.
Solubility
In water, 221 mg/L at 25 °Cexp.
Vapour pressure
4.4 × 10⁻⁴ mm Hg at 25 °Cexp.

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
184.24 g/molcalc.
Exact mass
184.10 Dacalc.
LogP (octanol/water)
3.13calc.
Topological polar surface area
24.06 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
14calc.
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(NNc2ccccc2)cc1

c1ccc(NNc2ccccc2)cc1

2 rings, 14 atoms. This chemical is the scaffold itself.

136 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.
UN number
UN 2811

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

Hydrazobenzene suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 12 suppliers
12 of 12 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

12 suppliers in 5 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Hydrazobenzene price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Chemical intermediate for benzidine, an intermediate for dyes, in synthesis of phenylbutazone (antiarthritic drug).

Antisludging additive to motor oil, (evaluated as) agent for insecticidal and insecticidal synergistic activity, desuckering agent for tobacco plants, reductant in reclamation of rubber, component of experimental organometallic polymers, use in photochromic resin compositions, in polymerization reactions.

Used as a chemical intermediate for the synthesis of phenylbutazone, sulfinpyrazone.

1,2-Diphenylhydrazine is no longer produced in the United States. 1,2-Diphenylhydrazine is used in the production of anti-inflammatory drugs.

Use classes: Benzidines/Aromatic amines.

How it is made

Hydrazobenzene is formed when nitrobenzene reacts with zinc dust in an alkaline solution.

Nitrobenzene (reductive coupling)

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 007-021-00-4

United States

  • TSCA inventory (USA)
    Status: Active 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 Hydrazobenzene is traded under.

HS 2928.00Indicative HS code

Organic derivatives of hydrazine or of hydroxylamine

World exports in 2024
$1.38B
−9.0% vs 2023, imports $1.52B
2019 to 2024
Top exporters
  1. Switzerland * partner reported44.0%
  2. China18.4%
  3. Italy9.4%
Top importers
  1. Brazil21.8%
  2. United States12.8%
  3. Italy10.8%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

Quick answers about Hydrazobenzene, based on the data on this page

What is Hydrazobenzene?

Hydrazobenzene is a colorless, crystalline compound that emits toxic fumes of nitrogen oxides when heated to decomposition.

What is the CAS number of Hydrazobenzene?

The CAS registry number of Hydrazobenzene is 122-66-7. Other or deprecated CAS numbers: 38622-18-3.

What is the molecular formula and weight of Hydrazobenzene?

The molecular formula of Hydrazobenzene is C12H12N2 and its molar mass is 184.24 g/mol.

What is Hydrazobenzene used for?

Chemical intermediate for benzidine, an intermediate for dyes, in synthesis of phenylbutazone (antiarthritic drug).

Is Hydrazobenzene hazardous?

Hydrazobenzene 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 Hydrazobenzene?

Hydrazobenzene is usually classified under HS code 292800 (Organic derivatives of hydrazine or of hydroxylamine). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hydrazobenzene?

CompoundList lists 12 suppliers of Hydrazobenzene in China, India, Czech Republic, Hong Kong and 1 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Hydrazobenzene in India?

3 suppliers in India list Hydrazobenzene on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Hydrazobenzene?

Suppliers quote Hydrazobenzene 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 Hydrazobenzene

Get quotes for Hydrazobenzene

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Hydrazobenzene
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Hydrazobenzene with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/hydrazobenzene-122-66-7" title="Hydrazobenzene structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Impurities and reference standards or HS code 292800

12 suppliers
Free quotes, contact stays private
Get quotes