Molecule structure of Diphenylamine (CAS NO.122-39-4):

IUPAC Name: N-Phenylaniline 
Molecular Weight: 169.22244 g/mol
Molecular Formula: C₁₂H₁₁N 
Melting Point: 52 °C
Index of Refraction: 1.634
Molar Refractivity: 55.62 cm³
Molar Volume: 155.4 cm³
Surface Tension: 44 dyne/cm
Density: 1.088 g/cm³
Flash Point: 152.8 °C
Enthalpy of Vaporization: 54.22 kJ/mol
Boiling Point: 302 °C at 760 mmHg
Vapour Pressure: 0.00102 mmHg at 25 °C 
Storage Temp.: 0-6 °C
Water Solubility: slightly soluble. 0.03 g/100 mL
XLogP3: 3.5
H-Bond Donor: 1
H-Bond Acceptor: 1
Rotatable Bond Count: 2
Exact Mass: 169.089149
MonoIsotopic Mass: 169.089149
Topological Polar Surface Area: 12
Heavy Atom Count: 13
Canonical SMILES: C1=CC=C(C=C1)NC2=CC=CC=C2
InChI: InChI=1S/C12H11N/c1-3-7-11(8-4-1)13-12-9-5-2-6-10-12/h1-10,13H
InChIKey: DMBHHRLKUKUOEG-UHFFFAOYSA-N
EINECS: 204-539-4
Product Categories: Intermediates of Dyes and Pigments;Organics;Bridged diphenylsPesticides&Metabolites;Alpha sort;DAlphabetic;ACS GradeNitrogen Compounds;C11 to C38;Essential Chemicals;Routine Reagents;Nitrogen Compounds;76/768/EEC Annex VIII;Bridged diphenylsAlphabetic;DIO - DIZCosmetics;Other AdditivesEuropean Community: ISO and DIN;Proposed Banning;Allergens;D;Fungicides;Pesticides;Amines;Aromatics;Chemical Class;Derivatization Reagents TLC;Nitrogen-containing compoundsTitration;Redox IndicatorsDerivatization Reagents TLC;TLC Reagents, D-F;Indicators;TLC Visualization Reagents (alphabetic sort);TLC Visualization Reagents (by application)

 Diphenylamine (CAS NO.122-39-4) has anti-scald activity which protect the apple skin from the oxidation products of alpha-farnesene during storage. So Diphenylamine is used as a pre-or postharvest scald inhibitor for apples. The derivatives of Diphenylamine are useful in many ways. Ring-alkylated derivatives of diphenylamine are used as "antiozinates" in the manufacture of rubber products. The compound undergoes various cyclisaton reactions. It gives phenothiazine, a precursor to certain pharmaceuticals with sulfur.

 Diphenylamine is manufactured by the thermal deamination of aniline over oxide catalysts:
2 C₆H₅NH₂ → (C₆H₅)₂NH + NH₃

Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

Hazard Codes: T, N, F
Risk Statements: 23/24/25-33-50/53-52/53-39/23/24/25-11 
R23/24/25:Toxic by inhalation, in contact with skin and if swallowed. 
R33:Danger of cumulative effects. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R39:Danger of very serious irreversible effects. 
R11:Highly flammable.
Safety Statements: 28-36/37-45-60-61-28A-16-7 
S28:After contact with skin, wash immediately with plenty of soap-suds. 
S36/37:Wear suitable protective clothing and gloves. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S16:Keep away from sources of ignition. 
S7:Keep container tightly closed.
RIDADR: UN 3077 9/PG 3
WGK Germany: 3
RTECS: JJ7800000
F: 8-10-23
HazardClass: 6.1
PackingGroup: III
Poison by ingestion. Experimental teratogenic effects. Action similar to aniline but less severe. Combustible when exposed to heat or flame. Can react violently with hexachloromelamine or trichloromelamine. Can react with oxidizing materials. To fight fire, use CO₂, dry chemical. When heated to decomposition it emits highly toxic fumes of NO_x. See also ANILINE, AMINES, and AROMATIC AMINES.

OSHA PEL: TWA 10 mg/m³
ACGIH TLV: TWA 10 mg/m³; Not Classifiable as a Human Carcinogen

For occupational chemical analysis use OSHA: #22.

 Diphenylamine (CAS NO.122-39-4) is also named as AI3-00781 ; Aniline, N-phenyl- ; Anilinobenzene ; Benzenamine, N-phenyl- ; Benzene, (phenylamino)- ; Benzene, anilino- ; Big Dipper ; C.I. 10355 ; CCRIS 4699 ; CI 10355 ; Caswell No. 398 ; DFA ; DPA (VAN) ; Deccoscald 282 ; Difenylamin ; Difenylamin [Czech] ; HSDB 1108 ; N,N-Diphenylamine ; N-Fenylanilin ; N-Fenylanilin [Czech] ; N-Phenylaniline ; N-Phenylbenzenamine ; NSC 215210 ; Naugalube 428L ; No-Scald ; No-Scald DPA 283 ; Phenylaniline ; Scaldip ; Shield DPA . Diphenylamine (CAS NO.122-39-4) is white crystals or powder with a pleasant odor. Dust may be explosive if mixed with air in critical proportions and in the presence of a source of ignition. Inhalation may irritate mucous membranes. Overexposure, including ingestion of solid or skin contact, may cause fast pulse, hypertension, and bladder trouble. Contact with dust irritates eyes. Diphenylamine discolors in light. It can react violently with hexachloromelamine and trichloromelamine. Diphenylamine is incompatible with strong oxidizing agents and strong acids. It is also incompatible with iron and silver salts. Diphenylamine reacts with nitrogen oxides.