2,6-Di-tert-butyl-p-cresol (BHT): A High-Purity Antioxidant Core Raw Material with Multi-Scenario Stability Advantages

With the rapid development of global industries such as polymers, food processing, cosmetics and industrial oils, problems like material aging, oil rancidity and oxidative deterioration of ingredients have become increasingly prominent, driving a soaring market demand for efficient, stable and safe antioxidants. Traditional antioxidants often suffer from low antioxidant efficiency, poor thermal stability, easy migration and precipitation, or unpleasant odors and safety risks. Ordinary phenolic antioxidants decompose and fail easily at high temperatures; some composite antioxidants show poor compatibility with substrates, degrading the appearance of finished products;food-grade antioxidants must balance safety and long-term stability.

Against this industry backdrop, 2,6-Di-tert-butyl-p-cresol (abbreviated as BHT)—a benchmark hindered phenolic antioxidant—has emerged as a core functional raw material leading anti-aging upgrades and ensuring consistent product quality. Boasting ultra-high purity, powerful antioxidant activity, excellent thermal stability and cross-industry adaptability, it delivers a safe, reliable and cost-effective anti-oxidation solution for diverse sectors.

 

Physical and Chemical Properties

2,6-Di-tert-butyl-p-cresol (BHT) is a typical hindered phenolic derivative, appearing as white crystalline powder at room temperature, with a molecular formula of C15H24O and a molecular weight of 220.35 g/mol. Its unique molecular structure endows it with physicochemical properties tailored for high-end applications across industries, highlighted as follows:

*Ultra-High Purity and Low Impurity: Meets both industrial and food-grade purity standards, with main component purity up to 99.9%, total impurities ≤0.05% and moisture ≤0.10%. Free of harmful residues like free phenol and heavy metals, it fully complies with stringent safety requirements for food-contact materials, premium polymer products and pharmaceutical excipients.

*Excellent Thermal Stability and Low Volatility: Melting point 69–71℃, boiling point 265℃, closed-cup flash point 127℃. It resists decomposition and volatilization loss under high-temperature processing (100–150℃), with minimal long-term consumption, making it ideal for high-heat processes like plastic extrusion, rubber vulcanization and oil refining.

*Unique Hindered Phenol Active Structure: The molecule contains hindered phenolic hydroxyl groups and tert-butyl side chains with large steric hindrance. It efficiently captures oxidation free radicals while avoiding self-deactivation, delivering strong and long-lasting antioxidant activity—an essential structural foundation for terminating oxidative chain reactions.

*Good Compatibility and Dispersibility: Insoluble in water, soluble in ethanol, acetone, mineral oils, vegetable oils and most organic solvents. It exhibits excellent compatibility with polyethylene, polypropylene, rubber, synthetic resins, animal and vegetable oils, with no delamination, precipitation or sedimentation, and no adverse impact on the transparency, color and mechanical properties of finished products.

Core Action Mechanism: Precise Matching for Multi-Field Demands, Multi-Dimensional Functional Support

BHT's core value stems from its hindered phenolic molecular structure, which precisely addresses the key anti-oxidation needs of different industries by fundamentally blocking oxidative aging processes with high specificity and efficiency.

Leveraging its sterically hindered phenolic hydroxyl structure, BHT actively captures active free radicals generated during material oxidation, terminating oxidative chain reactions via hydrogen atom transfer. This fundamentally curbs aging issues such as material degradation, oil rancidity, yellowing and performance decline. The tert-butyl side chains create a strong steric shielding effect, protecting phenolic hydroxyl groups from premature consumption for long-lasting antioxidant efficacy, while reducing molecular migration to prevent blooming on product surfaces and ensure stable appearance and performance.

Unlike conventional low-efficiency antioxidants, BHT is non-corrosive, odorless and free of side reactions with substrates, adapting to acidic, neutral and weakly alkaline systems. It also provides auxiliary thermal stabilization, synergistically enhancing materials’ resistance to thermal aging and delivering dual benefits of "anti-oxidation + thermal stability" to significantly reduce overall industrial application costs.

Wide Cross-Industry Applications: Efficient Anti-Oxidation as the Core, Covering High-Value Sectors

With ultra-high purity, powerful antioxidant performance and excellent adaptability, BHT has become a universal star raw material in the global antioxidant industry. Its applications extend from food safety to polymers, industrial oils and cosmetics, fully unlocking its functional value:

*Polymer Industry: Serves as the primary antioxidant for polyethylene, polypropylene, polystyrene, ABS resins, synthetic rubber, polyurethane and other polymers. It inhibits thermal-oxidative aging during processing and long-term use, preventing cracking, brittleness, discoloration and mechanical property loss, and significantly extending the service life of polymer products.

*Food and Oil Industry: As a food-grade antioxidant, it is widely used in animal/vegetable oils, fried foods, baked goods, nuts, meat products and feed. It effectively delays oil rancidity, inhibits color darkening and flavor deterioration, and extends shelf life while meeting food contact safety standards.

*Industrial Oils and Lubricants: Added to mineral oils, lubricants, hydraulic oils, transformer oils and fuel oils to inhibit oxidation-induced gum and asphaltene formation, preventing viscosity increase and equipment corrosion, and ensuring stable operation of industrial machinery lubrication systems.

*Cosmetics and Pharmaceuticals: Used in cosmetics, skincare products, fragrances and pharmaceutical excipients to prevent oxidative deterioration of oily and active ingredients, avoiding discoloration, odor and efficacy loss, and ensuring consistent quality of cosmetic and pharmaceutical products.

Significant Advantages Over Traditional Antioxidants

Compared with conventional antioxidants (e.g., BHA, propyl gallate, ordinary amine antioxidants) and common anti-aging additives, BHT’s core competitiveness lies in safety, efficiency, stability and versatility, with outstanding advantages in four key dimensions:

*Higher Purity and Safety Grade: Purity up to 99.9%, far exceeding traditional industrial antioxidants (≥98%). Free of harmful impurities, it has obtained food and pharmaceutical-grade safety certifications for direct use in food and pharmaceutical-related applications, eliminating safety risks associated with traditional alternatives.

*Stronger Antioxidant and Thermal Stability: Antioxidant efficiency is 1.5–2 times that of ordinary phenolic antioxidants. It resists decomposition and volatilization at high temperatures, with a long-term anti-aging lifespan of 2–3 years—far outperforming heat-sensitive antioxidants like BHA for high-temperature processing and long-term use scenarios.

*Lower Migration and High Compatibility: The sterically hindered structure drastically reduces migration and blooming risks. It exhibits excellent compatibility with polymers, oils and organic solvents without compromising product appearance or performance, perfectly avoiding whitening and stickiness issues common with traditional antioxidants.

*Multi-Functional Adaptability and Cost-Effectiveness: Integrates anti-oxidation, thermal stabilization and anti-aging functions, usable alone or synergistically with auxiliary antioxidants. Adaptable across food, materials and oil industries, its "one material for multiple uses" feature cuts procurement costs and delivers superior cost-effectiveness over single-function traditional antioxidants.

 

Choosing a Professional Supplier: Guarantee of High Purity and Stable Supply

As a specialized enterprise focused on the R&D and production of antioxidants and fine chemicals, DALIAN SINOBIO CHEMISTRY CO., LTD. is a reliable supplier of high-purity BHT, backed by advanced synthesis, precision purification technologies and strict end-to-end quality control. Our BHT products feature high purity, low impurities, excellent thermal stability and consistent batch quality, with main component purity stably reaching 99.9%—far exceeding general industry standards.

We provide customized product solutions and technical support tailored to diverse applications in polymers, food processing and industrial oils. Supported by a robust supply chain and comprehensive after-sales service system, we ensure stable and continuous product supply, helping global customers address core pain points such as material aging and quality deterioration. With premium products and professional services, we deliver a one-stop raw material solution for the fine chemical industry.

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