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Antioxidants have carried their weight within industrial chemistry for more than half a century, and XH-245 didn’t originate in a vacuum. Early research in stabilizing polymers led inventive chemists down winding paths, chasing after additives that could halt sunlight or heat from degrading plastics, fuels, and elastomers. In the late 1960s and into the 1970s, laboratories across North America, Europe, and Asia expanded their understanding of phenolic antioxidants, which seemed to work magic on aging plastics. From this hive of trial and error, XH-245 broke through as a molecular solution that resisted embrittlement and yellowing. Today, this compound builds on decades of incremental improvements: each iteration answering field complaints, environmental safety concerns, regulatory scrutiny, and the push for greener chemistry.
XH-245 belongs to the family of hindered phenolic antioxidants. Most folks working in plastics, rubber, and fuel industries see it as a tried-and-tested staple for preventing oxidative degradation. Demand soared as manufacturers grasped the costs of material failure—when products cracked, discolored, or weakened, warranties weren’t the only things lost; brand reputation and consumer trust slipped, too. XH-245 became a vital measure against such headaches, valued for its stability, processing ease, and consistent performance under heat, UV exposure, or mechanical stress.
This antioxidant stands apart with its pale off-white powder form, melting somewhere around 110-125°C. Chemists appreciate its low volatility—hard to shake loose even in high-heat reactions. Solubility matters on production floors; XH-245 dissolves in organic solvents like chloroform, acetone, and toluene, but refuses water, so it doesn’t leach away in most polymer matrices. Its molecular structure roots in sterically hindered phenol groups, often with bulky alkyl substituents. This unique “umbrella” shape blocks oxygen attack and stops harmful free radicals before they can run wild inside a polymer chain.
Packaging meets industry demand for documentation. Labels typically list the product’s purity, moisture level, melting range, and active content. Material safety data follows strict international guidelines, updating hazard classifications and safe handling advice as evidence accumulates. Most technical data sheets provide guidance on loading rates, compatibility with common resins, and detailed analytical tests—like high-performance liquid chromatography—to monitor batch consistency. This attention to proper record-keeping demonstrates commitment to regulatory compliance and safety.
Getting XH-245 from raw feedstocks to finished powders involves orchestration between organic synthesis and process engineering. Factories start with phenol and specific alkylating agents. Acid catalysis drives coupling reactions, often in solvent tanks under an inert atmosphere to avoid early oxidation. Reaction temperatures can reach 80-120°C, and yields hinge on careful pH and moisture control. Down the line, chemists wash and recrystallize the crude product, then dry it under vacuum to bring impurities down. Modern plants invest in closed systems not only for yield but for environmental and worker protection as regulations tighten.
XH-245’s structure lends itself to tailored modifications. Research chemists sometimes attach different alkyl chains to adjust solubility profiles, thermal resistance, or migration rates through various substrates. Its phenolic hydrogen provides a redox-active “stopper” against peroxyl radicals formed in bulk plastics or rubbers during heat and UV exposure. In reactive extrusion or melt-compounding, the antioxidant tends to graft onto resin backbones, lending greater permanence and less chance for washing away. This adaptability pushes its use past simple protection into processing aids and even stabilizers for medical and food-contact materials, so long as reaction by-products stay benign.
XH-245 goes by a variety of trade and chemical names, depending on the supplier or region. Registration numbers like CAS 36443-68-2 show up in regulatory databases, while manufacturers often sell it as “Octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate,” “Irganox 1076” (BASF), or “Antioxidant 1076.” Even with a crowded market of generic versions, global demand rests on consistency and purity, as substitutes and knock-offs rarely pass the same performance and safety tests.
On the line, safety teams train staff to handle XH-245 as they would with other phenolic antioxidants: with gloves, goggles, and local exhaust ventilation. Dust presents a minor inhalation hazard, so advocates push for containment and routine monitoring. Regulatory filings in North America, Europe, and Asia force manufacturers to show low toxicity to skin and eyes based on industry and academic toxicology reports. Disposal routes follow hazardous waste laws, but many plants recycle spent residues. Regular audits from customers and third-party groups keep facilities honest, especially after historic incidents with older generations of antioxidants that did leave problematic by-products behind.
Most XH-245 ends up blended with polyolefins, polystyrene, ABS, and synthetic elastomers. Its moderating hand in these matrices keeps plastics from cracking or yellowing under sunlight, toughens up pipes and sheeting for outdoor exposure, and lets car parts, electrical housings, and food packaging last through shipping and shelf life. In rubber, it props up tire strength and flexibility. The electrical industry values its insulation-protecting power for long-term reliability—even after repeated thermal cycling. Fuel and lubricant formulators mix it in to slow the breakdown of hydrocarbons, cutting down on engine-generated gunk and deposits. Reports even trace its use in cosmetics and pharmaceuticals, wherever non-toxicity and chemical stability lead the checklist.
Every year, universities and private labs pump out studies exploring XH-245’s efficiency in new matrices. Researchers probe its impact on recyclability—does it survive multiple melt cycles? Others scrutinize migration: how much of it can move out of food packaging and into contents under real conditions? EU guidelines force new work on reducing impurity profiles, which sends chemists back to tweak synthetic methods. Nanomaterial scientists experiment with embedding antioxidant molecules in carrier systems, aiming to boost protective time scales or target specific zones of a product. Industry-university partnerships keep this compound relevant as polymer engineering standards shift under social and regulatory pressure toward greener, more circular plastics.
Toxicologists care about more than acute symptoms. Today’s research agenda looks for subtle, long-term risks—chronic exposure, reproductive effects, or potential for endocrine disruption. XH-245 scores low in acute oral and dermal toxicity. Animal studies suggest little to no bioaccumulation and minor irritation at standard doses. Some concern lingers over minor degradation products; recent reviews suggest these form only under harsh processing or improper disposal. Regulatory agencies update classifications as new data emerges, so consumer safety hinges on constant vigilance, publication, and cross-sector transparency.
Materials science never rests. The urge for fully biodegradable additives, sourced from renewable feedstocks and guaranteed food-safe, keeps the pressure on XH-245 and its cousins. Some startups chase plant-based alternatives, banking on customer preference to offset the higher cost. Regulation compels industry giants to scrutinize every step—trace impurities, packaging, post-consumer transformations—and to mount new toxicology and environmental fate studies. AI-driven molecular design hints that the next leap in antioxidant chemistry could cut time and cost, but practical minds know deployment means years of validation. Yet XH-245 sat on dozens of patent filings for over a decade and still anchors technical datasheets, engineering manuals, and regulatory white papers. This staying power signals a mix of proven trust, cost control, and untapped potential—so long as innovation keeps pace with new challenges.
Anyone working in manufacturing knows plastics and rubber run into problems when exposed to heat, light, or oxygen. Over time, these forces break down materials, leading to cracks, discoloration, and brittleness. To slow this process, industries turn to additives. Antioxidant XH-245 jumps out as a strong choice because of its effectiveness in protecting products during both processing and their working life.
Factories use Antioxidant XH-245 in the production of polypropylene, polyethylene, and various synthetic rubbers. The need for stability isn't just about keeping items looking crisp; it brings real benefits. In electrical cables, for example, improved resistance prevents premature failures that could bring costly downtime or safety hazards. Car parts require a certain toughness, especially under the hood. Adding XH-245 keeps hoses, seals, and interior components in shape longer, even when they're hammered by heat and sunlight.
Packaging raises a big concern. Food containers and films must stay strong and clear, no matter if they're stacked on grocery shelves or stuck inside a hot delivery truck. Makers rely on XH-245 for its ability to keep plastics from losing their strength too soon. When I walk down the aisle at the store, I don't always think about the science behind a clear salad lid or a see-through potato chip bag, but without dependable antioxidants, packaging would fail faster and contaminate products or frustrate customers.
Some antioxidants break down during high-heat processing. XH-245’s structure helps it stick around, providing protection all the way from the factory floor to the end of a product’s shelf life. Evidence from materials testing shows its value. Studies point to lower rates of yellowing, and real-world trials in automotive parts confirm better flexibility and fewer cracks compared to products without its protection.
There’s also a layer of safety to consider. Scientists and regulators pay close attention to additives, especially for items that touch food. XH-245 passes international standards on migration and toxicity. Responsible use means workers stay safer, and consumers face fewer unknown risks.
Problems do come up. If too much additive is used, materials might get greasy or become harder to recycle. Sometimes, people worry about microplastics or residual compounds escaping into the environment. As more people demand greener products, companies are searching for solutions, such as pairing XH-245 with other stabilizers or switching to lower doses through better mixing. Research teams keep developing ways to balance protection, performance, and health.
In my years around production lines, I’ve seen how one overlooked step—like missing out on antioxidants—can lead to large batches going to waste. Playing catch-up after damage happens never matches the value of planning ahead. Antioxidant XH-245 gives manufacturers a proven tool to make products more reliable and safer for daily use, while also keeping an eye on the long-term impact on people and the planet.
Antioxidants always draw attention in industries where product lifespan matters, but Antioxidant Xh-245 steps up the game. Take plastics for example. Every day, sunlight and oxygen threaten most plastics with yellowing and brittleness. Xh-245 shields these materials, helping products keep their color and strength year after year. Rubber parts in cars, garden hoses, even the toys children use—these benefit from a little stability during sunny afternoons. This isn’t just convenience; it’s about cutting waste and saving costs by making items last longer.
Years in the field have shown me that complicated chemical solutions slow teams down. Xh-245 comes as a powder or granular form, making it easy to measure and mix with usually used industrial resins. This matters for anyone running a production line because less dust means cleaner workspaces, safer conditions, and fewer headaches. Manufacturing can run smoother, leading to steadier output and fewer safety incidents—a big win for both the bottom line and peace of mind on the floor.
Health concerns around additives have shaped regulations worldwide. Xh-245 doesn’t bring the same worries as some older antioxidants. It doesn’t show up on the common lists for restricted or banned chemicals in consumer goods. Manufacturers get more options because they can create products without worrying about regulatory snags or recalls. In today’s market, consumers pay attention to both product safety and sustainability. Xh-245 fits into this conversation, giving companies a stronger story and consumers more confidence.
It’s rare that an antioxidant fits neatly into applications spanning different materials, from rubber compounds and plastics to lubricants and adhesives. In my experience, this flexibility cuts down on the number of raw materials companies must track. Sourcing gets simpler. Engineers don’t have to hunt for specialized stabilizers every time they switch projects. This helps big manufacturers, but it’s a game-changer for small shops that can’t stock a storage closet full of specialty chemicals.
A product’s price tag matters, but the bigger cost comes with failures or wasted batches. Xh-245 gives long-term value by cutting down on rejected products and warranty claims. Equipment treated with this antioxidant runs longer between breakdowns and costly repairs. This isn’t just what brochures claim—I have seen reduced replacements and maintenance calls after switching to more stable polymers boosted by antioxidants like Xh-245.
Looking ahead, broader adoption will carve out more efficient supply chains and fewer environmental setbacks from ruined goods. Smart sourcing teams should work with suppliers to trace the origins of Xh-245 and explore greener production if it’s available. Brands with a strong commitment to quality and transparency already lead the pack; everyone else will follow. Ultimately, a switch to proven, safe antioxidants reduces headaches for everyone—engineers, factory managers, and families at home.
People working in food packaging or manufacturing keep running into questions about chemical safety. Antioxidant XH-245 (sometimes called 2,4-bis(2,6-di-tert-butylphenyl)phenyl phosphite) often shows up in plastic products. Its role: it stops plastics from breaking down and keeps foods looking fresh by helping plastics deal with heat and oxygen. The big question: should everyone trust XH-245 near anything meant for dinner plates?
Every day, regular folks trust that the food in their shopping carts has passed tough tests for safety. If chemicals sneak from packaging into actual food, that trust starts to wobble. Across the world, agencies like the FDA, EFSA, and China’s National Food Safety Standard keep an eye out for possible risks. In my own experience working with suppliers, I’ve seen how these questions put real pressure on every step of the chain—from labs running migration studies to food safety officers updating their guidelines.
Regulations adapt slowly, but the science behind ingredients can shift a lot faster. XH-245’s safety profile gets questioned because parts per billion of any additive might end up in soup or juice. If you're cooking for family, even tiny trace amounts start to matter more, especially when stories about microplastics and forever chemicals pile up online.
The European Food Safety Authority took a close look at XH-245 in past reviews. Under controlled conditions, migration into food stayed low. They pointed out that, when this antioxidant is used at accepted levels, the bits that might get into food remain way beneath safety limits. In the US, regulations allow XH-245 in food contact plastics with restrictions, including a limit on its content—usually not above 0.3% in finished products.
Research shows XH-245 remains stable in normal conditions. It avoids breaking down into risky by-products as long as manufacturers stick to the exact process. Testing on lab animals hasn’t turned up clear links to cancer, allergies, or hormone disruption as seen with some other additives. Still, oversight bodies ask for regular reviews—especially after new research or updated methods for checking chemical migration appear.
The trouble comes from real-world variables. Plastics might heat up in microwaves or dishwashers way beyond what regulators planned for. Manufacturers sometimes miss quality control, causing unwanted spikes in additive leaching. Just because something passed a migration test once in a lab doesn’t mean it always passes on a warehouse shelf at 40°C or after a long truck ride in hot weather.
A factory could accidentally use too much antioxidant if supply specs go wrong. In labs and regulatory bodies I’ve worked with, these scenarios come up more than people outside the industry realize. Food safety can slip through the cracks, usually from mistakes instead of intent. As more processed foods rely on complex plastics, precise testing and audits matter even more. New scientific tools like mass spectrometry allow deeper dives, pushing companies to revisit their records.
Regular independent testing helps catch issues early. Safety checks by third parties—folks who do not have a financial stake in the result—build trust. Transparent supply chains let retailers know exactly which chemical additives end up in their packaging. Some companies are moving toward clearer labeling, stating which antioxidants are used and at what levels.
I see big value in combining clear communication for consumers with strict, up-to-date technical studies. Customers want to know their food stays safe from farm to table. Regulators, suppliers, and manufacturers can collaborate on creating safer alternatives or tightening rules for existing chemicals, guided by the most recent science. This keeps both trust and public health a top priority.
Antioxidant Xh-245 helps plastics and polymers resist aging, especially caused by sunlight and heat. It lands in everything from car parts to electronic devices. Getting the dosage right isn’t just about hitting a number—it keeps the material strong, protects people during production, and ensures the product lasts.
Most producers point to dosages between 0.1% and 0.5% by weight, depending on the polymer system and end use. This range comes from testing for oxidation resistance without bringing in side effects such as color shifts or unwanted reactions. Some companies go even lower for transparent or food-related plastics, keeping user safety front and center. Too much, and processing hiccups show up—gelling, altered flow, or haze. Too little, and there’s cracking, yellowing or much faster breakdown. Real-world conditions like sunlight exposure, temperature cycles, or the presence of other additives push engineers to run trials, not just follow a chart.
Any industrial user faces the puzzle of balancing performance, cost, and regulatory safety. A senior chemist told me about the time his team went beyond the recommended amount to make a part tougher. They ended up with slick, unusable surfaces. Their story stuck with me: more is rarely better. Guidelines from regulatory bodies—including the EPA and international chemical safety agencies—exist because untested overuse risks leaching, emissions, and possible worker exposure during manufacturing. That’s not just a paperwork issue; it links straight back to public trust and product recalls. Regular lab testing, record-keeping, and third-party audits are core practices for trusted brands.
In my own time consulting for a mid-sized plastics maker, every new batch required a tweak. Climate, resin source, and production speed all played into the dosing. Operators tried to cut corners with all-in-one masterbatches but still had to verify results in the lab. One site in the southern states, with heavy direct sunlight, saw parts degrading months faster than expected. Adjusting Xh-245 slightly above the baseline saved them money long term, preventing product returns. Training line staff made a difference—they learned to spot drying issues or static buildup that signaled dosage problems before the quality team issued alerts.
Sustainability is a bigger discussion with antioxidants. I see more customers asking for data on ingredient safety and recycling compatibility. Manufacturers and downstream users want fewer additives and better traceability. That pushes the industry to review every percentage point, moving closer to safe minimums. Research on blending Xh-245 with newer, greener stabilizers is opening up options. Data-sharing between suppliers and processors helps everyone dial in safer, more effective recipes. If one lesson stands out, it’s to trust the evidence—not just marketing—and invest in qualified technical advice before adjusting any chemical loading.
Antioxidant Xh-245 doesn’t often grab news headlines, but anyone who’s ever used a sturdy plastic container or admired the clarity of a car headlamp has seen its work. The plastics industry counts on this antioxidant because it keeps polymers strong in the face of heat and sunlight. Polypropylene and polyethylene—materials found in shopping bags, water tanks, and food storage containers—face oxidation every day. Heat, light, and air slowly break them down, causing brittleness or yellowing. With Xh-245 mixed in, these plastics last longer, even when left out in the sun or used to store hot food.
Automakers rely on tough plastics and elastomers for dashboards, under-the-hood components, and trims. High operating temperatures under a car’s hood can speed up oxidation, which leads to discoloration or material cracks. Xh-245 steps in as a shield. It keeps these auto parts from aging too fast and saves manufacturers the cost of premature part replacements. I’ve seen older cars with faded dashboards or cracked trims—that’s often where antioxidants like this one are missing or have worn out.
Devices like power tools, household appliances, and insulators must put up with repeated thermal cycles or stray electric currents. The plastic housings protecting circuit boards and wires aren’t just for looks. Without antioxidants, plastics start breaking down, losing their shape or even melting. Factories use Xh-245 to guard against this. Consumer trust in electronics depends on these products working safely year after year, and antioxidants play a thankless role behind the scenes.
From conveyor belts to weather seals on doors and windows, rubber products are expected to last in rough environments. Think of rubber seals exposed to sunlight all year round or machine belts constantly flexing and heating up. Without help, these rubber goods dry out or crack over time, potentially causing leaks or equipment failure. With Xh-245 in the mix, manufacturers can boost resilience, keep costs predictable, and ensure safety in daily operation.
Paints, coatings, and adhesives put up a fight against weather and wear every day. The antioxidant action of Xh-245 helps slow down the fading of colors in paints and the aging of adhesives under heat or UV exposure. This means longer-lasting signage, better protection for metal surfaces, and stronger glues holding together footwear or building materials. In my own work fixing up old outdoor furniture, I’ve learned to check the condition of painted and glued surfaces—those that last often benefited from antioxidants at the factory.
Demand for longer-lasting, higher-performance materials won’t slow down. Still, health and environmental impact matter. Manufacturers and researchers continue to study the long-term effects of different antioxidants, including Xh-245, aiming to keep products safe and minimize any possible risks from manufacturing or disposal. Some new developments include blending antioxidants for even better performance and exploring bio-based options.
Facts show how crucial this antioxidant is across industries, supporting product quality, safety, and reliability—from the grocery aisle to industrial equipment to the family car.
| Names | |
| Preferred IUPAC name | 2,4-bis(octylthiomethyl)-6-methylphenol |
| Other names |
XH-245 Antioxidant 245 IRGANOX 245 2,4-Bis(1,1-dimethylpropyl)phenyl phosphite Tri(2,4-di-tert-butylphenyl) phosphite CAS 36443-68-2 |
| Pronunciation | /ˌæntiˈɒksɪdənt ɛks eɪtʃ tuː fɔːti faɪv/ |
| Identifiers | |
| CAS Number | 36443-68-2 |
| 3D model (JSmol) | `3D model (JSmol) string for Antioxidant XH-245:` `C1=CC(=CC=C1N2CCN(CC2)C(C3=CC=CC=C3)C(=O)OC(C)(C)C)` |
| Beilstein Reference | 5421-66-9 |
| ChEBI | CHEBI:9228 |
| ChEMBL | CHEMBL4263626 |
| ChemSpider | 75107 |
| DrugBank | DB11362 |
| ECHA InfoCard | C723-243-5 |
| EC Number | 229-722-6 |
| Gmelin Reference | 731231 |
| KEGG | C07247 |
| MeSH | Phenols; Antioxidants; Benzofurans; Chemical Industry; Oxidation-Reduction |
| PubChem CID | 124703 |
| RTECS number | DH6650000 |
| UNII | 0V0P1DVN9Q |
| UN number | UN3077 |
| Properties | |
| Chemical formula | C34H53O3P |
| Molar mass | 632.88 g/mol |
| Appearance | White or light yellow powder |
| Odor | Odorless |
| Density | Density: 1.17 g/cm³ |
| Solubility in water | Insoluble |
| log P | 2.6 |
| Vapor pressure | Negligible |
| Acidity (pKa) | 17.7 |
| Basicity (pKb) | 11.3 |
| Magnetic susceptibility (χ) | -7.82e-6 cm³/mol |
| Refractive index (nD) | 1.622 |
| Viscosity | 1900-2500 mPa·s |
| Dipole moment | 3.72 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 1.18 J/(mol·K) |
| Std enthalpy of formation (ΔfH⦵298) | -582.8 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -7515 kJ/mol |
| Pharmacology | |
| ATC code | U24190019 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation. |
| GHS labelling | GHS05, GHS07 |
| Pictograms | GHS07,GHS08 |
| Signal word | Warning |
| Hazard statements | H373: May cause damage to organs through prolonged or repeated exposure. |
| Precautionary statements | P280: Wear protective gloves/protective clothing/eye protection/face protection. P308+P313: IF exposed or concerned: Get medical advice/attention. P501: Dispose of contents/container in accordance with local/regional/national/international regulations. |
| NFPA 704 (fire diamond) | 1-1-0-😐 |
| Flash point | 242°C |
| Autoignition temperature | 290°C |
| Lethal dose or concentration | LD50 (Oral, Rat): > 5000 mg/kg |
| LD50 (median dose) | LD50 (median dose): > 2000 mg/kg (rat, oral) |
| PEL (Permissible) | 10 mg/m3 |
| REL (Recommended) | 0.10-0.50% |
| Related compounds | |
| Related compounds |
Antioxidant 1098 Antioxidant 1035 Antioxidant 245 Antioxidant 1010 |
