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Chemical Name:
NSC 3510;RCRA U-109;NCI-C01854;NCI-C-01845;1,2-Diphenyl;Hydrazobenzen;HYDRAZOBENZENE;n,n’-bianiline;N,N'-Bianiline;Hydroazobenzene
Molecular Formula:
Formula Weight:
MOL File:

1,2-Diphenylhydrazine Properties

Melting point:
123-126 °C(lit.)
Boiling point:
308.2°C (rough estimate)
1,158 g/cm3
refractive index 
1.6266 (estimate)
storage temp. 
Stable. Incompatible with strong oxidizing agents, strong acids.
CAS DataBase Reference
122-66-7(CAS DataBase Reference)
NIST Chemistry Reference
Hydrazine, 1,2-diphenyl-(122-66-7)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  T,N
Risk Statements  45-22-50/53
Safety Statements  53-45-60-61
RIDADR  UN 3077 9/PG 3
WGK Germany  3
RTECS  MW2625000
HazardClass  6.1
PackingGroup  III
Hazardous Substances Data 122-66-7(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H333 May be harmful if inhaled Acute toxicity,inhalation Category 5 P304+P312
H341 Suspected of causing genetic defects Germ cell mutagenicity Category 2 Warning P201,P202, P281, P308+P313, P405,P501
H350 May cause cancer Carcinogenicity Category 1A, 1B Danger
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P201 Obtain special instructions before use.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P308+P313 IF exposed or concerned: Get medical advice/attention.
P405 Store locked up.
P501 Dispose of contents/container to..…

1,2-Diphenylhydrazine price More Price(5)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 126721 Hydrazobenzene 122-66-7 25g $40.7 2018-11-13 Buy
Sigma-Aldrich 442232-U 1,2-Diphenylhydrazine analytical standard, ampule of 100 mg 122-66-7 u $52 2018-11-13 Buy
TCI Chemical H0180 Hydrazobenzene >98.0%(HPLC) 122-66-7 25g $89 2018-11-22 Buy
TCI Chemical H0180 Hydrazobenzene >98.0%(HPLC) 122-66-7 100g $272 2018-11-22 Buy
Alfa Aesar A18037 Hydrazobenzene, tech. 90%, remainder mainly azobenzene 122-66-7 25g $36.8 2018-11-13 Buy

1,2-Diphenylhydrazine Chemical Properties,Uses,Production

Chemical Properties

yellow crystalline powder


Impurity in the production of Phenylbutazone (P319570). Hydrazobenzene is a metabolic intermediate of Azobenzene Carcinogenic

General Description

Orange powder or a bright orange crystalline solid.

Air & Water Reactions

1,2-Diphenylhydrazine oxidizes in air. 1,2-Diphenylhydrazine decomposes in acid solutions. Insoluble in water.

Reactivity Profile

1,2-Diphenylhydrazine is a mild reducing agent. Incompatible with strong oxidizing agents, strong acids, acid chlorides and acid anhydrides. Interaction with perchloryl fluoride in the presence of a dilutent below 32°F has caused separation of explosive solids. Is readily oxidized by nitric acid, silver nitrate or permanganate. Is reduced under alkaline conditions .

Fire Hazard

Flash point data for 1,2-Diphenylhydrazine are not available; however, 1,2-Diphenylhydrazine is probably combustible.

Purification Methods

Crystallise hydrazobenzene from hot EtOH containing a little ammonium sulfide or H2SO3 (to prevent atmospheric oxidation), preferably under N2. Dry it in a vacuum desiccator, and store it in the dark or under N2. Alternatively, crystallise it from pet ether (b 60-100o) to constant absorption spectrum. It is almost colourless but in air it turns yellow, then red with the formation of azobenzene. The hydrochloride crystallises from EtOH and has m 163-164o(dec); however, hydrazobenzene readily rearranges to benzidine in the presence of acid. The picrate crystallises from *C6H6 and has m 123o(dec). [Beilstein 15 H 123.]

1,2-Diphenylhydrazine Preparation Products And Raw materials

Raw materials

Preparation Products

1,2-Diphenylhydrazine Suppliers

Global( 124)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
+86 (0)571-855 867 18
+86 (0)571-858 647 95 China 19958 60
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22063 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32764 55
RiZhao Rain Bio-Pharmaceutical Co., Ltd. 0633-2957765 2957767 13468322238
0633-8662788 China 6 60
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84
TCI (Shanghai) Development Co., Ltd. 021-67121386 / 800-988-0390
021-67121385 China 24654 81
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Capot Chemical Co., Ltd +86 (0) 571 85 58 67 18
0086-571-85864795 China 18276 66

1,2-Diphenylhydrazine Spectrum

122-66-7(1,2-Diphenylhydrazine)Related Search:

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