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AZOBENZENE

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AZOBENZENE Basic information

Product Name:
AZOBENZENE
Synonyms:
  • TRANS-AZOBENZENE
  • AZOBENZENE PESTANAL
  • AZOBENZENE, 1GM, NEAT
  • AZOBENZENE 1X1ML MEOH 2000UG/ML
  • AZOBENZENE, 500MG, NEAT
  • (E)-1,2-Diphenyldiazene
  • Azobenzeen
  • Azobenzen
CAS:
103-33-3
MF:
C12H10N2
MW:
182.22
EINECS:
203-102-5
Product Categories:
  • Pharmaceutical Intermediates
  • Aromatics
  • Azobenzene, etc. (Photochromic Compounds)
  • Heterocycles
  • Impurities
  • Mutagenesis Research Chemicals
  • Photochromic Compounds
  • Functional Materials
  • A
  • A-BPesticides&Metabolites
  • AcaricidesAlphabetic
  • Alpha sort
  • AR to AZ
  • Pesticides
  • Pesticides&Metabolites
  • Stains and Dyes
  • Stains&Dyes, A to
  • Volatiles/ Semivolatiles
  • Azo/Diazo Compounds
  • Nitrogen Compounds
  • Organic Building Blocks
  • Aromatics, Heterocycles, Impurities, Mutagenesis Research Chemicals
Mol File:
103-33-3.mol
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AZOBENZENE Chemical Properties

Melting point:
66 °C
Boiling point:
293 °C(lit.)
Density 
1.09 g/mL at 25 °C(lit.)
vapor pressure 
1 mm Hg ( 104 °C)
refractive index 
1.62662 (78.1℃)
Flash point:
100 °C
storage temp. 
2-8°C
solubility 
6.4mg/l
form 
Crystalline Powder
color 
Orange
Water Solubility 
Soluble in alcohol, ether, benzene and glacial acetic acid. Insoluble in water.
Merck 
14,917
BRN 
1819138
Stability:
Stable. Combustible. Incompatible with strong oxidizing agents. Air and light sensitive.
CAS DataBase Reference
103-33-3(CAS DataBase Reference)
IARC
3 (Vol. 8, Sup 7) 1987
EPA Substance Registry System
Azobenzene (103-33-3)
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Safety Information

Hazard Codes 
T,N,Xn,F
Risk Statements 
45-20/22-48/22-50/53-68-67-65-62-51/53-38-11-48/20-39/23/24/25-23/24/25-52/53
Safety Statements 
53-45-60-61-62-36/37-33-29-16-9-7
RIDADR 
UN 3077 9/PG 3
WGK Germany 
3
RTECS 
CN1400000
Autoignition Temperature
890 °F
TSCA 
Yes
HazardClass 
6.1(b)
PackingGroup 
III
HS Code 
29270000
Toxicity
LD50 orally in Rabbit: 1000 mg/kg

MSDS

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AZOBENZENE Usage And Synthesis

Chemical Properties

orange to red crystals

Chemical Properties

Azobenzene is a combustible, orange-red crystalline solid.

Uses

Impurity in the production of Phenylbutazone (P319570).

Uses

acaricide, insecticide

Uses

Precursor for dyes, for polymers.

Definition

ChEBI: A molecule whose structure comprises two phenyl rings linked by a N=N double bond; the parent compound of the azobenzene class of compounds.

Synthesis Reference(s)

Canadian Journal of Chemistry, 38, p. 2526, 1960 DOI: 10.1139/v60-344
Chemical and Pharmaceutical Bulletin, 36, p. 1529, 1988
Tetrahedron Letters, 25, p. 1259, 1984

General Description

Orange-red crystals or dark brown chunky solid.

Air & Water Reactions

AZOBENZENE is sensitive to air and light. Dust may form an explosive mixture in air. Insoluble in water.

Reactivity Profile

AZOBENZENE is an azo compound. Azo, diazo, azido compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. AZOBENZENE is incompatible with strong oxidizing agents.

Hazard

Toxic; may cause liver injury. Questionable carcinogen.

Fire Hazard

Flash point data for AZOBENZENE are not available. AZOBENZENE is probably combustible.

Safety Profile

Moderately toxic by ingestion and possibly other routes. Questionable carcinogen with experimental carcinogenic, neoplastigenic, and tumorigenic data. When heated to decomposition it emits toxic fumes of NOx.

Potential Exposure

An azo compound. Those engaged in azobenzene use in dye, rubber, chemical, and pesticide manufacturing.

Shipping

UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.

Purification Methods

Ordinary azobenzene is nearly all in the trans-form. It is partly converted into the cis-form on exposure to light [for isolation see Hartley J Chem Soc 633 1938, and for spectra of cis-and trans-azobenzenes, see Winkel & Siebert Chem Ber 74B 6701941]. trans-Azobenzene is obtained by chromatography on alumina using 1:4 *C6H6/heptane or pet ether, and it crystallises from EtOH (after refluxing for several hours) or hexane. All operations should be carried out in diffuse red light or in the dark. [Beilstein 16 IV 8.]

Incompatibilities

Azo compounds can detonate. This applies in particular to organic azides that have been sensitized by the addition of metal salts or strong acids. Toxic gases are formed by mixing materials of this class with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. Flammable gases are formed by mixing materials in this group with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides. This chemical is sensitive to prolonged exposure to heat. This chemical is incompatible with strong oxidizing agents.

AZOBENZENE Preparation Products And Raw materials

Preparation Products

Raw materials

AZOBENZENESupplier

J & K SCIENTIFIC LTD.
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010-82848833- ;010-82848833-
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Meryer (Shanghai) Chemical Technology Co., Ltd.
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Alfa Aesar
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TCI (Shanghai) Development Co., Ltd.
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021-67121386 / 800-988-0390
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Beijing dtftchem Technology Co., Ltd.
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13651141086; 86(10)60275028、60275820
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