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An authoritative technical evaluation of N,N'-Bis(1-methylpropyl)-1,4-phenylenediamine in monomer stabilization, fuel oxidation inhibition, and synthetic rubber aging control.
In modern industrial organic chemistry, Antioxidant 44PD (chemically designated as N,N'-Bis(1-methylpropyl)-1,4-phenylenediamine or N,N'-Di-sec-butyl-p-phenylenediamine, CAS 101-96-2) stands as one of the most vital phenylenediamine-based radical scavengers and anti-ozonants. Global chemical processing complexes, refineries, and polymer manufacturers rely heavily on 44PD due to its superior electron-donating capacity, sterically hindered aromatic amine architecture, and outstanding solubility in organic substrates.
As a leading China 44PD manufacturer and supplier, JIMPOCHEM CO., LTD operates advanced synthesis facilities equipped with continuous catalytic hydrogenation and high-vacuum distillation units. This whitepaper serves as a definitive guide for procurement directors, R&D chemists, and chemical engineers seeking in-depth data on 44PD synthesis kinetics, performance benchmarking, regulatory compliance, and strategic procurement from China's top chemical infrastructure.
| Technical Parameter | Specification Standard (Industrial Grade) | Specification Standard (Polymer/High Purity) | Test Method Benchmark |
|---|---|---|---|
| Chemical Name | N,N'-Bis(1-methylpropyl)-1,4-phenylenediamine / N,N'-Di-sec-butyl-p-phenylenediamine | IUPAC Standard Nomenclature | |
| CAS Registry Number | 101-96-2 | Chemical Abstracts Service | |
| Molecular Formula / Weight | C₁₄H₂₄N₂ / 220.35 g/mol | Mass Spectrometry (MS) | |
| Active Purity (GC-FID) | ≥ 98.0% | ≥ 99.2% | Gas Chromatography (ASTM D5504) |
| Physical Appearance | Dark reddish-brown clear liquid | Amber to reddish-brown transparent liquid | Visual Assessment |
| Density (20°C) | 0.935 - 0.945 g/cm³ | 0.938 - 0.942 g/cm³ | Pycnometer / ASTM D4052 |
| Boiling Point (760 mmHg) | 315°C - 320°C (with minimal thermal decomposition) | ASTM D1078 | |
| Flash Point (Closed Cup) | > 135°C (275°F) | ASTM D93 Pensky-Martens | |
| Moisture Content (Karl Fischer) | ≤ 0.3% | ≤ 0.1% | ASTM E203 Coulometric KF |
| Solubility Profile | Miscible in hydrocarbons, aromatics, alcohols, esters; insoluble in water | Solubility Protocol 25°C | |
Understanding how Antioxidant 44PD protects organic matrices against oxidative degradation, polymerization, and ozone cracking.
44PD acts as a primary chain-breaking antioxidant through Hydrogen Atom Transfer (HAT). The sterically hindered secondary amine hydrogen atoms (N-H) readily donate hydrogen radicals to active peroxyl radicals ($ROO^\bullet$), converting them into stable hydroperoxides ($ROOH$) and preventing auto-catalytic polymer degradation.
In vinyl monomers such as styrene, butadiene, and acrylic esters, free radicals formed by thermal or oxidative stress induce spontaneous unwanted polymerization. Antioxidant 44PD instantly quenches free radical nuclei, guaranteeing safe long-distance marine transport and multi-month storage without popcorn polymer formation.
Due to its high reactivity with atmospheric ozone ($O_3$), 44PD forms a protective film on elastomer surfaces. It reacts faster with ozone than double bonds in natural or synthetic rubbers (SBR, NBR), inhibiting micro-crack initiation and significantly extending rubber product operational lifetimes.
Deployment of Antioxidant 44PD across petrochemical refining, aviation fuel additive formulations, polymer manufacturing, and elastomer processing.
In refining crack gasolines and aviation fuels (Jet A-1), unsaturated hydrocarbons (olefins and diolefins) react with ambient oxygen, causing gum formation, injector fouling, and turbine nozzle deposits. 44PD is an approved fuel antioxidant under international standards including ASTM D1655 and DEF STAN 91-091.
During the distillation, transportation, and bulk storage of reactive monomers (Styrene Monomer, Isoprene, Butadiene, Acrylonitrile), spontaneous thermal polymerization poses severe safety hazards and process equipment blockages.
Heavy-duty tires, industrial conveyor belts, and rubber seals undergo severe dynamic flex fatigue and atmospheric ozone exposure. 44PD provides dual protection against thermal oxidation and dynamic ozone degradation.
In olefin reboilers, thermal cracking units, and hydrocarbon heat exchangers, organic fouling degrades energy efficiency. Injecting 44PD into process streams inhibits free-radical condensation reactions that lead to heavy sludge and coke deposition.
Empowering world-class chemical supply chains with verified quality, scale, and technical authority.
How JIMPOCHEM leverages Shandong's integrated chemical ecosystem to provide reliable bulk supply and cost optimization.
Located in the Chemical Industry Park of Jinan City, Shandong Province, JIMPOCHEM benefits from direct pipeline and regional integration for key raw materials (phenylenediamine intermediates and MEK). This insulates global procurement partners from severe market price volatility and feedstock shortages.
Our 500+ acre manufacturing facility operates under distributed control systems (DCS). Continuous reaction technology ensures ultra-high batch-to-batch consistency, eliminating color variations and preventing impurity side-reactions during 44PD synthesis.
In full compliance with China's dual-carbon sustainability goals, JIMPOCHEM utilizes advanced catalytic hydrogenation processes that substitute eco-friendly hydrogen gas for hazardous reduction chemicals, backed by zero-liquid-discharge wastewater treatment plants.
Seamless international trade execution backed by full regulatory documentation, SDS, REACH registration, and customized packaging options.
Navigating global chemical control laws requires meticulous technical documentation. JIMPOCHEM provides complete compliance files for enterprise customers worldwide:
Antioxidant 44PD is a liquid amine requiring specialized handling to prevent oxidation, discoloration, and moisture absorption during sea transport:
Integrating chemical research & development, large-scale synthesis, dynamic quality assurance, and technical support.
Established in 2010 and headquartered in the high-tech Chemical Industry Park of Jinan City, Shandong Province, JIMPOCHEM CO., LTD covers an expansive industrial area exceeding 500 acres. As a premier chemical raw material manufacturer, our core focus spans fine organic synthesis, cosmetic active ingredients, fluorine chemicals, and specialized industrial antioxidants.
Our senior engineering team comprises industry veterans with over 16 years of hands-on synthesis and process engineering expertise. We do not simply supply chemical drums—we offer custom formula optimization, impurity profile control, on-site dosage evaluations, and complete supply chain resilience solutions.
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Expert insights addressing key technical inquiries regarding Antioxidant 44PD (CAS 101-96-2), dosage standards, logistics, and quality assurance.
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