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Oxidizing and reducing agents

Phenylhydrazine

Also known as Hydrazinobenzene, Hydrazine, phenyl-, Phenylhydrazin

CAS 100-63-0Formula C6H8N2Molar mass 108.14 g/molEC 202-873-5
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Serious health hazard, Hazardous to the environment 61 suppliers listed
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Phenylhydrazine chemical structure, C6H8N2, CAS 100-63-0
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Monoclinic prisms or oil
Melting point
19.5 °C
Boiling point
243.9 °C
Density
Relative density (water = 1): 1.1
Flash point
88 °C
HS code
292800
Category
Oxidizing and reducing agents
UN number
UN 2572
Illustrative photo, closed blue fibre drums on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Phenylhydrazine?

Plain description, key identifiers and synonyms

Phenylhydrazine is a phenylhydrazine that is the monophenyl derivative of hydrazine. It has a role as a xenobiotic.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
phenylhydrazine
CAS number
100-63-0 CAS number cross-checked
EC number
202-873-5
Molecular formula
C6H8N2
UNII
064F424C9K
MDL number
MFCD00007573
InChIKey
HKOOXMFOFWEVGF-UHFFFAOYSA-N
InChI
InChI=1S/C6H8N2/c7-8-6-4-2-1-3-5-6/h1-5,8H,7H2
SMILES (canonical and isomeric)
C1=CC=C(C=C1)NN

Synonyms

  • Hydrazinobenzene
  • Hydrazine, phenyl-
  • Phenylhydrazin
  • Monophenylhydrazine
  • Hydrazine-benzene
  • Fenilidrazina
  • Fenylhydrazine
  • Phenyldiazane
  • phenylhydrazide
  • 1-Phenylhydrazine
  • phenyl hydrazine
  • phenyl-hydrazine
  • PhNHNH2
  • aminoaniline
  • penylhydrazine
  • phenyihydrazine
  • anilino nitrogen
  • phenylhy-drazine
  • N-phenylhydrazine
  • 2-phenylhydrazine
  • UN 2572
  • Hydrazine,phenyl
  • Phenylhydrazine, 97%
  • 4-15-00-00050 (Beilstein Handbook Reference)
  • Phenylhydrazine Hydrazinobenzene
Show all 27 synonyms
  • Edaravone impurity 3 (phenylhydrazine)
  • Phenylhydrazine, purum, >=95.0% (GC)

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
Monoclinic prisms or oilexp.
Odour
Faint, aromatic odor.exp.
Melting point
19.5 °Cexp.
Boiling point
243.9 °Cexp.
Density
Relative density (water = 1): 1.1exp.
Flash point
88 °Cexp.
Autoignition temperature
173 °Cexp.
Solubility
In water, 1.27 × 10⁺⁵ mg/L at 25 °Cexp.
Vapour pressure
0.026 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
108.14 g/molcalc.
Exact mass
108.0687 Dacalc.
LogP (octanol/water)
0.97calc.
Topological polar surface area
38.05 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
8calc.
Rings
1calc.
Aromatic rings
1calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment
230NFPA 704 rating

Hazard statements

  • H301Toxic if swallowed.
  • H311Toxic in contact with skin.
  • H315Causes skin irritation.
  • H317May cause an allergic skin reaction.
  • H319Causes serious eye irritation.
  • H331Toxic if inhaled.
  • H341Suspected of causing genetic defects.
  • H350May cause cancer.
  • H372Causes damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
Precautionary statements (29)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • 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.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P318If exposed or concerned, get medical advice.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2572
Transport hazard class
6.1
Packing group
II

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

Phenylhydrazine suppliers

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All 61 suppliers
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Where suppliers are based

61 suppliers in 11 countries

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Phenylhydrazine price

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Uses and applications

What the substance is used for, by industry and function

Manufacture dyes, antipyrine, nitron (a stabilizer for explosives), reagent for sugars, aldehydes, ketones.

Reducing agent (Phenylhydrazine hydrochloride).

Used as a chemical intermediate for the synthesis of 3-amino-1-phenyl-5-pyrazolone, chloridazon, 4,4-dimethyl-1-phenyl-3-pyrazolidinone, ethyl 1-phenylpyrazolone-3-carboxylate, 2-methylindole, 3-methyl-1-phenyl-5-pyrazolone, N-methyl-2-p-tolylindole, 2-phenylindole, 1-phenyl-3-pyrazolidone, sulfaphenazole, triazophos, L-tryptophan.

Organic synthesis (intermediates, dyestuffs, pharmaceuticals).

Industrial uses: Intermediate.

Pharmacological actions

  • Oxidants

Roles

  • xenobiotic

How it is made

Prepared by diazotizing aniline with sodium nitrite and hydrochloric acid, then treating solution with sodium sulfite followed by sodium hydroxide.

Benzenediazonium chloride (reduction)

A general synthesis for arylhydrazines is via diazotization of aromatic amines, followed by reduction of the resulting diazonium salt. In the industrial synthesis of phenylhydrazine, the reducing agent is sodium bisulfite.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 612-023-00-9[1]

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 Phenylhydrazine 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 Phenylhydrazine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Phenylhydrazine?

Phenylhydrazine is a phenylhydrazine that is the monophenyl derivative of hydrazine. It has a role as a xenobiotic.

What is the CAS number of Phenylhydrazine?

The CAS registry number of Phenylhydrazine is 100-63-0.

What is the molecular formula and weight of Phenylhydrazine?

The molecular formula of Phenylhydrazine is C6H8N2 and its molar mass is 108.14 g/mol.

What is Phenylhydrazine used for?

Manufacture dyes, antipyrine, nitron (a stabilizer for explosives), reagent for sugars, aldehydes, ketones. Reducing agent (Phenylhydrazine hydrochloride).

Is Phenylhydrazine hazardous?

Phenylhydrazine carries the GHS signal word "Danger". Main hazards: toxic if swallowed, toxic in contact with skin, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phenylhydrazine?

Phenylhydrazine 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 Phenylhydrazine?

CompoundList lists 61 suppliers of Phenylhydrazine in China, India, United States, Germany and 7 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Phenylhydrazine in India?

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

What is the price of Phenylhydrazine?

Suppliers quote Phenylhydrazine 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 Phenylhydrazine

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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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