74-31-7 Usage
Description
N,N'-Diphenyl-4-phenylenediamine (DPPD) is a rubber
accelerant, formerly contained in the "black rubber
mix". The most frequent occupational categories are in
metal industry, homemakers, health services and
laboratories, and building industries.
Chemical Properties
grey powder
Uses
Different sources of media describe the Uses of 74-31-7 differently. You can refer to the following data:
1. Polymerization inhibitor. Antioxidant for rubber, petroleum oils, feedstuffs.
2. N1,N4-Diphenylbenzene-1,4-diamine can be used to prepare low pressure change, high temperature resistant flame retardant silicone rubber.
3. N,N'-Diphenyl-4-phenylene diamine is an antioxidant for rubber, petroleum oils, and feed stuffs; stabilizer; a polymerization inhibitor; used to retard copper degradation;
as an intermediate for dyes, drugs, plasties and detergents; antidegradant for nitrile-butadiene rubber, natural, styrene-butadiene,
isoprene, butadiene, and ehloroprene rubbers.
Definition
ChEBI: An N-substituted diamine that is 1,4-phenylenediamine in which one hydrogen from each amino group is replaced by a phenyl group.
General Description
Gray or dark gray powder or flakes.
Air & Water Reactions
Insoluble in water.
Reactivity Profile
N,N-Diphenyl-p-phenylenediamine may react with oxidizing materials . Neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides.
Fire Hazard
N,N-Diphenyl-p-phenylenediamine is combustible. N,N-Diphenyl-p-phenylenediamine may form explosive dust-air mixtures.
Contact allergens
A rubber accelerant, formerly contained in “blackrubber mix.” The most frequent occupational categories are in the metal industry, homemakers, health services and laboratories, and the building industry.
Purification Methods
Crystallise the diamine from EtOH, chlorobenzene/pet ether or *benzene. It has also been crystallised from aniline, then extracted three times with absolute EtOH. [Beilstein 13 H 80.]
Check Digit Verification of cas no
The CAS Registry Mumber 74-31-7 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 7 and 4 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 74-31:
(4*7)+(3*4)+(2*3)+(1*1)=47
47 % 10 = 7
So 74-31-7 is a valid CAS Registry Number.
InChI:InChI=1/C18H16N2/c1-3-7-15(8-4-1)19-17-11-13-18(14-12-17)20-16-9-5-2-6-10-16/h1-14,19-20H
74-31-7Relevant articles and documents
Formation and photophysics of a stable concave-convex supramolecular complex of C60 and a substituted s-triazine derivative
Schuster, David I.,Rosenthal, Joel,MacMahon, Shaun,Jarowski, Peter D.,Alabi, Christopher A.,Guldi, Dirk M.
, p. 2538 - 2539 (2002)
Spectroscopic, electrochemical and computational data (show that C60 and a highly phenylated s-triazine derivative form a stable supramolecular complex at micromolar concentrations in solution at ambient temperatures, due to strong van der Waals attraction between their complementary surfaces.
Design, preparation and characterization of aerogel NiO-CuO-CoO/SiO2 nanocomposite as a reusable catalyst for C-N cross-coupling reaction
Ghasemi, Amir Hossein,Naeimi, Hossein
supporting information, p. 5056 - 5063 (2020/04/09)
Aerogels are porous, non-crystalline solid materials with high specific surface space, plentiful three-dimensional (3D) porous construction, ultra-low density and significant porosity. The aerogel nanocomposite is produced using sol-gel and supercritical drying processes. CO2 supercritical drying (SCD) is the most powerful process, ensuring optimal product properties such as high porosity, low density, and high thermal conductivity. On this account, we used the CO2 supercritical drying method to produce NiO-CuO-CoO/SiO2 nanocomposite aerogels and applied it as a reusable catalyst for the C-N cross-coupling reaction (Buchwald-Hartwig amination). Powerful catalytic activity for the C-N cross-coupling reaction was obtained for the new nanocomposite aerogel, that is, NiO-CuO-CoO/SiO2. The catalyst was characterized by X-ray Powder Diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), elemental mapping and Brunauer-Emmett-Teller (BET). Also, organic compounds were identified by melting point, Fourier-transform infrared spectroscopy (FT-IR) and hydrogen-1 nuclear magnetic resonance (1H NMR) analyses.
Preparation method of diaryl p-phenylenediamine anti-aging agent
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Paragraph 0069-0076, (2020/02/10)
The invention provides a preparation method of a diaryl p-phenylenediamine anti-aging agent represented by a formula I, wherein the method comprises: carrying out a condensation dehydrogenation reaction on p-nitroaniline and a raw material B represented by a formula II in the presence of a solvent, a water-carrying agent and a catalyst, wherein R1 and R2 are respectively and independently H or C1-C6 alkyl, and R is H or C1-C6 alkyl.