122-66-7
Product Name:
1,2-Diphenylhydrazine
Formula:
C12H12N2
Synonyms:
N,N′-Diphenylhydrazine;N,N′-Bianiline;Hydrazobenzene;NSC 3510
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | 1,2-diphenylhydrazine appears as orange powder or a bright orange crystalline solid. (NTP, 1992) |
|---|---|
| Color/Form | Tablets from alcohol and ether |
| Boiling Point | Decomposes (NTP, 1992) |
| Melting Point | 268 °F (NTP, 1992) |
| Solubility | less than 0.1 mg/mL at 64 °F (NTP, 1992) |
| Density | 1.158 at 61 °F (NTP, 1992) - Denser than water; will sink |
| Vapor Pressure | 0.00044 [mmHg] |
| LogP | log Kow= 2.94 |
| Henry's Law Constant | Henry's Law constant = 4.8X10-7 atm-cu m/mol at 25 °C /Estimated/ |
| Stability/Shelf Life | Hydrazobenzene (10 ug/L) in dilute aqueous solution was found to be unstable with less than 10% remaining for longer than one day of preservation (in the dark) under any of the conditions tested (ie, room temperature or 4 °C at pH 2,7, or 10 and with or without chlorine). |
| Decomposition | When heated to decomposition it emits toxic fumes of /nitrogen oxides/. |
| Dissociation Constants | pKa = -0.65 /Estimated/ |
| Kovats Retention Index | 1609.6 1588 1588 1596 |
| Other Experimental Properties | Heat of fusion: 17,645 J/mole |
| Chemical Classes | Nitrogen Compounds -> Hydrazines |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08  Environment GHS09 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H350:Carcinogenicity H410:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P201:Obtain special instructions before use. P273:Avoid release to the environment. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 184.24 g/mol |
|---|---|
| XLogP3 | 2.9 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 2 |
| Rotatable Bond Count | 3 |
| Exact Mass | 184.100048391 g/mol |
| Monoisotopic Mass | 184.100048391 g/mol |
| Topological Polar Surface Area | 24.1 Ų |
| Heavy Atom Count | 14 |
| Formal Charge | 0 |
| Complexity | 128 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
1,2-Diphenylhydrazine is a white solid. There is no information on what it smells like or whether it will burn. It does not dissolve easily in water, but when placed in water, it rapidly breaks down into other chemicals. These include the toxic chemicals benzidine and azobenzene. It does not evaporate easily but may be released to air when attached to dust particles. 1,2-Diphenylhydrazine is a man-made chemical that was used in the past to make benzidine which was used to make various fabric dyes. Benzidine dyes are no longer used in the United States, but may still be used in other countries. The only current use of 1,2-diphenylhydrazine in the United States is in the production of medicines to treat inflammation and a type of arthritis.