Description

N,n-Diphenyl-p-Phenylenediamine is a high-performance aromatic amine antioxidant and antiozonant. This compound is critical for protecting rubber and polymer materials from oxidative and ozone-induced degradation, thereby extending their service life. It is an essential additive for manufacturers in the tire, automotive parts, and industrial rubber goods sectors seeking to enhance product durability.

Application

• Rubber Antioxidant/Antiozonant: Primary use as a protective agent in natural rubber (NR) and synthetic rubbers like styrene-butadiene rubber (SBR) and polybutadiene rubber (BR) for tires, hoses, belts, and seals.
• Polymer Stabilizer: Imparts thermal and oxidative stability to various polymers and plastics during processing and long-term use.
• Fuel and Lubricant Additive: Functions as an antioxidant in fuels, oils, and greases to prevent gum formation and viscosity increase.
• Chemical Intermediate: Used in the synthesis of other specialty chemicals, dyes, and pigments.
• Wire & Cable Insulation: Protects the polymeric insulation materials from environmental aging.
• Industrial Elastomers: Key component in the formulation of vibration dampeners, gaskets, and O-rings for demanding applications.

Basic Information

Product Name	N,n-Diphenyl-p-Phenylenediamine
CAS No.	74-31-7
Molecular Formula	C18H16N2
Molecular Weight	260.34 g/mol
Synonyms	N,N'-Diphenyl-p-phenylenediamine; DPPD; Antioxidant DPPD; Dioctylated Diphenylamine; p-Phenylenediamine, N,N'-diphenyl-; Antigene D; Vulkanox DPPD; Santoflex 13; 1,4-Benzenediamine, N1,N4-diphenyl-
EINECS	200-806-4

Quality Control

Our N,n-Diphenyl-p-Phenylenediamine is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets the high-purity standards required for industrial applications. A comprehensive Certificate of Analysis (COA) detailing purity, physical properties, and impurity profiles is provided with each shipment to guarantee consistency and performance.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, open flames, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Light gray to grayish-brown powder or flakes
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	130 - 135 °C
Loss on Drying	≤ 0.5%
Ash Content	≤ 0.1%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.