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Specifications of 4-Hydroxydiphenylamine丨CAS 122-37-2
|
Appearance |
Grey white to grey solid powder |
|
Purity (HPLC) |
98.0% min |
|
Identification |
In the chromatogram recorded under the relevant substance item, the retention time of the main peak of the test solution should be consistent with the retention time of the main peak of the reference solution |
|
Melting Point (MP) |
67–73℃ |
|
Related Substances (HPLC) |
Any single unknown impurity: 0.5% max |
Overview
4-Hydroxydiphenylamine丨CAS 122-37-2 is an aromatic amine derivative, combining antioxidant activity with useful chemical reactivity in high-temperature and oxidative environments.
Applications
Rubber and Polymer Antioxidant
One of the primary uses of 4-hydroxydiphenylamine is as an antioxidant and antidegradant in rubber and elastomeric materials.
Prevents oxidative aging, cracking, and brittleness in natural rubber, synthetic rubber (e.g., SBR, NBR), and polyurethane-based materials.
Lubricant Additive
Acts as a high-temperature antioxidant in industrial and automotive lubricants.
Inhibits oxidative degradation of base oils, improving engine oil performance and extending service life.
Plastics and Coatings Stabilizer
Used to stabilize thermoplastics and protective coatings exposed to heat or UV, improving long-term durability.
Intermediate in Chemical Synthesis
Serves as a building block in the synthesis of dyes, pharmaceuticals, and other specialty chemicals.
Research Applications
Studied in mechanistic and kinetic research on antioxidant behavior, radical scavenging, and electron transfer processes in organic materials.
Benefits
Effective Antioxidant Activity
The hydroxyl and amine groups together provide dual antioxidant mechanisms: hydrogen donation and free radical stabilization.
Particularly effective under thermal stress, making it ideal for automotive and industrial applications.
Improves Material Longevity
Enhances the aging resistance of rubbers, lubricants, and polymers exposed to oxygen, ozone, or heat.
Extends the functional lifetime of products under demanding environmental conditions.
Chemical Stability
Offers good chemical resistance and stability in diverse processing environments.
Retains effectiveness even in acidic or mildly basic conditions.
Low Volatility
Remains in the polymer matrix without significant volatilization or migration, ensuring long-term protection.
Compatible with Many Systems
Can be blended with other stabilizers, UV absorbers, or antiozonants for synergistic protection in complex formulations.
Summary
4-Hydroxydiphenylamine丨CAS 122-37-2 is a high-performance antioxidant and stabilizer used across the rubber, lubricant, and plastics industries. With its excellent oxidative resistance properties and compatibility with high-temperature systems, it plays a critical role in extending the life and improving the quality of industrial and consumer products. Its dual-action antioxidant nature-thanks to both hydroxyl and amine groups-makes it especially effective in demanding applications.
