Rubber & additive

Antioxidant 245

Other name: equivalent to Irganox 245

CAS: 36443-68-2

MF: C34H50O8

MW: 586.77

Package: 25kg per bag

Origin: China

008618005174481 sales@nanjingchem.com Inquiry

Product Introduction

Antioxidant 245 | High Efficiency Hindered Phenol Antioxidant|CAS 36443-68-2

1. Product Introduction

Antioxidant 245, commonly known as Irganox 245 (CAS 36443-68-2), is a high-efficiency asymmetric hindered phenol primary antioxidant widely used in global polymer processing industries. This premium polymer anti-aging additive features a unique asymmetric molecular structure, delivering outstanding low volatility, superior hydrolytic stability and excellent high-temperature thermal resistance. Unlike traditional symmetric hindered phenol antioxidants, Antioxidant 245 achieves long-term thermal stabilization and anti-aging protection with lower dosage, effectively inhibiting thermal oxidation degradation, molecular chain breakage and yellowing of polymer materials during high-temperature processing and long-term outdoor service.

As a universal high-performance plastic antioxidant additive, Antioxidant 245 is specially formulated for high-performance polymers, industrial adhesives, water-based coatings and thermoplastic elastomer materials. It efficiently captures active free radicals generated by thermal oxidation reactions, terminates chain oxidation cycles, and prevents cross-linking failure and mechanical performance attenuation, greatly extending the service life of plastic, rubber and composite polymer products. Our factory-supplied Antioxidant 245 boasts high purity (≥99%), ultra-low impurities, stable batch consistency and excellent resin compatibility. Fully compliant with FDA food contact regulations and EU environmental standards, it is a trusted anti-aging solution for global industrial manufacturers in high-end material production.

2. Product Specifications

Test Item	Standard Specification	Test Condition / Method
Chemical Name	Ethylenebis(oxyethylene) bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate]	–
CAS No.	36443-68-2	–
Molecular Formula	C₃₄H₅₀O₈	–
Molecular Weight	586.77	–
Appearance	White powder / white granule	Visual Inspection
Purity	≥99.0%	HPLC Test
Melting Point	79℃ – 83℃	Thermal Analysis
Volatility	Low volatility	High Temperature Test
Ash Content	≤0.1%	Ignition Method
Moisture Content	≤0.1%	Karl Fischer Method
Solubility	Soluble in acetone, toluene and organic solvents; insoluble in water	Solubility Test

3. Product Features & Applications

Core Product Features

High-efficiency polymer anti-aging performance: As a premium hindered phenol primary antioxidant, Antioxidant 245 rapidly captures oxidation free radicals and terminates thermal oxidation chain reactions. It effectively solves common polymer defects including material yellowing, surface cracking, viscosity increment and mechanical strength decline, providing long-term stable anti-aging protection for various polymer materials.
Ultra-low volatility & excellent thermal stability: The unique asymmetric molecular structure endows Antioxidant 245 with extremely low volatility under high-temperature extrusion and molding conditions. It avoids additive loss, product surface blooming and production equipment pollution, perfectly adapting to high-temperature industrial polymer processing technology.
Superior hydrolytic stability for wet environments: Compared with conventional plastic antioxidants, Antioxidant 245 features exceptional hydrolysis resistance. It maintains stable anti-aging performance in high-humidity and wet processing environments without functional failure caused by moisture erosion, ensuring durable protection for finished polymer products used in humid working scenarios.
Excellent synergistic stabilization effect: Antioxidant 245 can form a high-efficiency composite anti-aging system with phosphite auxiliary antioxidants, thioester stabilizers and UV light stabilizers. This synergistic combination significantly enhances the weather resistance, thermal oxidation resistance and comprehensive aging resistance of polymer composite materials.
Wide compatibility & safe environmental performance: This polymer antioxidant has excellent compatibility with polyolefin, styrene resin, polyurethane, polyester and most synthetic polymer materials. With low odor and non-toxic properties, it complies with FDA food contact and EU RoHS environmental standards, safe for manufacturing food packaging and medical polymer materials.

Main Application Fields

Polymer & Plastic Industry Applications: Widely used as a thermal stabilizer and anti-aging additive for PP, PE, ABS, PS, PC and modified engineering plastics. It inhibits thermal oxidative degradation during high-temperature processing and long-term aging, maintaining stable mechanical properties and color stability for automotive plastic parts, household appliance shells and industrial engineering plastic products.
Adhesive & Sealant Industry Applications: A professional anti-aging additive for polyurethane adhesives, hot melt adhesives, silicone sealants and industrial bonding materials. It effectively prevents adhesive yellowing, gelation and viscosity fluctuation, improving long-term storage stability and bonding durability of industrial adhesive products.
Coating & Ink Industry Applications: Applied in high-performance industrial coatings, water-based environmental coatings and printing inks. It resists thermal oxidation and ultraviolet aging, effectively avoiding coating film cracking, fading and peeling, and greatly improving the weather resistance and service life of coating finishes.
Elastomer & Rubber Material Applications: Ideal for thermoplastic elastomers, synthetic rubber and latex products. It enhances the thermal aging resistance and dynamic fatigue resistance of rubber materials, reducing hardening, cracking and performance degradation of rubber products during long-term dynamic operation.
Food Packaging & Medical Material Applications: Complying with international safety certification standards, Antioxidant 245 is widely applied in food contact packaging materials and medical polymer products, providing safe, non-toxic and reliable anti-aging protection for high-end sensitive polymer materials.

4. Packaging, Storage & International Sea Shipping

Packaging Standard

Standard export packaging of Antioxidant 245 adopts 25kg kraft paper bag with inner plastic moisture-proof lining for global shipment. Customized packaging solutions including 1kg/5kg small sample bags and 1000kg IBC ton bags are available upon customer requirements. All packages undergo professional moisture-proof, dust-proof and sealed anti-leakage treatment, fully adapting to long-distance international sea transportation and stacked warehouse storage.

Storage Requirements

Store Antioxidant 245 polymer antioxidant in a cool, dry, ventilated and dust-free indoor warehouse. Keep the product far away from high-temperature heat sources, open flames, strong oxidants, direct sunlight and humid environments to prevent moisture absorption, material agglomeration and anti-aging performance attenuation. All packaging bags must be tightly sealed during storage and handling. Under standard sealed storage conditions, the valid shelf life is 12 months. For expired products, full index re-inspection is required before use; only qualified products can be put into formal production.

International Shipping & Hazard Classification

Hazardous Goods Confirmation: Antioxidant 245 is classified as non-dangerous general fine chemical for international sea, air and land transportation, with low environmental risk and no strict dangerous goods supervision restrictions.

UN Number: No UN number required

Hazard Grade: Non-hazardous commodity

Although Antioxidant 245 is non-hazardous, it is necessary to avoid rain soaking, long-term humid stacking, violent extrusion and package damage during international sea transportation. Mixing with strong oxidizing substances and acidic chemicals is prohibited. We provide complete standardized export documents including English MSDS, official COA batch analysis reports and certification files to ensure fast, compliant and smooth global customs clearance for all clients.

5. Company Introduction & Production Strength

Founded in 2001, our enterprise is a professional high-tech manufacturer and reliable global export supplier of polymer antioxidants, light stabilizers and plastic additive products in China. We own a standardized modern fine chemical production base covering 100 acres, equipped with 5 full-automatic professional production lines specially used for antioxidant series product manufacturing. With mature synthetic production technology, strict purification processes and stable daily production capacity, we can flexibly support small trial orders and large-batch full-container orders, fully meeting the diversified procurement demands of global polymer material manufacturers.

We always prioritize independent technological R&D and innovative upgrading. Professional R&D engineers and senior laboratory testing technicians account for more than 20% of our total employees. Our professional R&D team focuses on core technical research and iterative upgrading of Antioxidant 245 and all similar polymer antioxidant products, including independent optimization of synthetic production processes, development of high-precision product detection and impurity analysis methods, upgrading of high-stability product formulas, and full-process environmental protection treatment technology for industrial waste gas, wastewater and solid waste, ensuring stable batch quality and full environmental compliance of our products.

Our factory has obtained authoritative ISO9001 International Quality Management System Certification and official national chemical production licenses, with complete production qualifications and standardized whole-process quality control system. We implement strict raw material incoming inspection, real-time monitoring in production process and full-index batch testing for every shipment of Antioxidant 245, ensuring all products feature high purity, low impurities and stable performance. With more than 20 years of chemical export experience, our high-quality polymer additives are exported to Southeast Asia, the Middle East, Europe, North America and other global markets, winning long-term trust and recognition from overseas industrial buyers.

6. FAQ

Q1: What is Antioxidant 245?

A1: Antioxidant 245 (CAS 36443-68-2), also known as Irganox 245, is a high-efficiency asymmetric hindered phenol primary antioxidant for polymers. It features ultra-low volatility, excellent hydrolytic stability and strong free radical scavenging capacity. As a universal anti-aging additive, it is widely used in plastics, adhesives, coatings, elastomers and polymer composite materials to prevent thermal oxidation aging, yellowing and mechanical performance degradation, serving as a core essential additive in the global polymer processing industry.

Q2: What specifications of Antioxidant 245 can you supply?

A2: We mainly supply premium industrial-grade Antioxidant 245 with purity ≥99.0%, featuring ultra-low moisture, low ash content and stable batch quality consistency. Customized products with special particle sizes and high-purity refined grades are available according to customers’ special industrial application requirements. For every batch of products, we can provide complete official documents including English MSDS, COA (Certificate of Analysis) and professional batch test reports to support global customs clearance and product quality inspection.

Q3: What are your export trade advantages for global buyers?

A3: We provide buyer-centric, low-risk and flexible global export services for all overseas partners, with competitive trade advantages as follows:

Multiple flexible payment methods: Support T/T, L/C at sight and other negotiable international payment terms to reduce customer cooperation risks.
Free sample service: Provide free Antioxidant 245 test samples, customers only need to bear the international courier freight.
Support trial order: Fully accept small-batch trial orders for new customers to test product quality and application effect before bulk cooperation.
Complete document support: Provide standard English MSDS, batch COA, ISO certification, production license and full set of export clearance documents.

Q4: What is your company’s market positioning and qualification?

A4: We are one of the leading professional manufacturers and bulk suppliers of Antioxidant 245 and polymer antioxidant additives in China. We hold valid national chemical production licenses and authoritative ISO9001 international quality system certification. Integrating independent R&D, standardized large-scale production and global export sales, we commit to providing high-quality, cost-effective and stable polymer antioxidant additives for industrial purchasers worldwide.

Q5: Is Antioxidant 245 dangerous goods for international sea shipment?

A5: No. Antioxidant 245 is a general non-dangerous fine chemical with no hazard classification and no UN transport number. The customs declaration and international sea transportation procedures are simple and efficient, supporting safe, fast and cost-effective global delivery.

008618005174481

sales@nanjingchem.com