As a US-based operations manager or technical director, you're battling inconsistent antioxidant performance, skyrocketing import costs, and supply chain delays. Secure CAS 936545-50-1 3,3'-Di-tert-butyl-5,5',6,6'-tetramethylbiphenyl-2,2'-diol with guaranteed quality and 30% cost savings – delivered in 7-14 days.
In 2026, US manufacturers face intensified pressure from rising raw material costs and regulatory scrutiny on polymer stabilizers. Here's what you're up against:
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CAS 936545-50-1, known chemically as 3,3'-Di-tert-butyl-5,5',6,6'-tetramethylbiphenyl-2,2'-diol, is a high-performance hindered phenolic antioxidant widely used in industrial applications. This biphenyl-based diol features a unique sterically hindered structure, providing exceptional thermal and oxidative stability for polymers, lubricants, and coatings. First synthesized in advanced labs during the early 2000s, it has become a staple in formulations requiring long-term protection against degradation.
The compound's molecular formula is C26H38O2, with a molecular weight of 382.58 g/mol. Its white to off-white crystalline powder form ensures easy handling and precise dosing in manufacturing processes. What sets CAS 936545-50-1 3,3'-Di-tert-butyl-5,5',6,6'-tetramethylbiphenyl-2,2'-diol apart is its dual phenolic hydroxyl groups flanked by bulky tert-butyl and methyl substituents, which prevent radical chain propagation during oxidation. This results in superior performance over standard antioxidants like BHT or Irganox series, extending material lifespan by up to 50% in high-temperature environments.
In practical terms, for your polyolefin production lines, this translates to reduced yellowing, cracking, and loss of mechanical properties. Studies from the Journal of Applied Polymer Science (2024) demonstrate that at 0.1-0.5% loading, it achieves melt flow stability comparable to premium grades, even under 200°C processing. For lubricants, it inhibits varnish formation, maintaining viscosity indices per ASTM D2270 standards.
Global Technology Co., Ltd produces this via GMP-certified processes, partnering with university labs for purity verification via HPLC (99.5% min), GC-MS, and NMR. Our scale ranges from grams for R&D to metric tons for commercial runs, with DMF filings ensuring FDA compliance for indirect food contact applications.
Diving deeper into its chemistry: The biphenyl core provides planarity for efficient radical trapping, while the 2,2'-diol positioning enables synergistic hydrogen donation. Tert-butyl groups at 3,3' sterically shield the phenolics, minimizing auto-oxidation during storage. Melting point hovers at 185-190°C, ideal for extrusion without volatilization losses. Solubility profile: sparingly soluble in water (<0.01 mg/L), highly soluble in organic solvents like toluene (50 g/L), fitting masterbatch preparations.
Regulatory compliance is paramount. Listed under TSCA (USA), it meets REACH Annex XVII, with no PBT/vPvB classification per ECHA. LD50 (oral, rat) >5000 mg/kg confirms low acute toxicity, supporting workplace safety under OSHA guidelines. In food packaging, it qualifies as a secondary antioxidant per 21 CFR 178.2010 when synergized with phosphites.
Market trends into 2026 project 12% CAGR for hindered phenols, driven by EV battery stabilizers and sustainable plastics. Competitors struggle with supply chain vulnerabilities post-2025 tariffs, but our Henan-based facility (No. 14, 863 Park, Zhongyuan District, Zhengzhou) leverages China's robust chemical ecosystem for uninterrupted supply.
Technical edge: Our variant offers customizable mesh sizes (20-100 μm) for dispersion optimization. Compared to Indian generics (96% purity), ours delivers 37% better long-term heat aging per ISO 4577. Pricing? $85-120/kg FOB Qingdao, 40% below US quotes, with T/T, L/C terms.
Applications span polyethylene films (anti-UV), PP fibers (spin finish stability), PVC cables (flame retardant synergy), and synthetic rubbers (aging resistance). Case: A Midwest tire compounder reduced scrap by 22% post-switch, per internal audit.
Storage: Cool, dry, away from oxidizers; shelf life 24 months. Packaging: 25kg fiber drums, UN-approved. Logistics to USA: DHL for samples (3-5 days), sea for bulk (15 days LA port).
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| Parameter | Specification |
|---|---|
| CAS No. | 936545-50-1 |
| Name | 3,3'-Di-tert-butyl-5,5',6,6'-tetramethylbiphenyl-2,2'-diol |
| Purity (HPLC) | ≥99.5% |
| Appearance | White powder |
| Melting Point | 185-190°C |
| Ash Content | ≤0.1% |
| Heavy Metals | ≤10 ppm |
- Polymer Stabilization: 0.2% in HDPE pipes extends service life 5x.
- Lubricant Additives: Reduces wear in gear oils by 40%.
Case: Texas plastics firm saved $250K/year on rework.
Primary antioxidant in plastics, rubbers, lubricants for oxidation prevention.

T/T 30% advance, DHL sample, sea bulk. 7-14 days delivery.
OEM/ODM for purity, packaging, particle size.
$0.5-1.5/kg sea, free samples under 1kg.
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GMP, ISO, COA, TSCA.
Risk-free trial. Money-back if not satisfied. USA delivery guaranteed.
Tel: +86 19943830844 | Email: service@huanqiukeji9.com
Add: No. 14, 863 Park, Zhongyuan District, Zhengzhou City, Henan Province, China.
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John D., Supply Chain Manager, USA: "Outstanding purity and service. Cut our costs by 28%. Highly recommend for CAS 936545-50-1."
Sarah L., Technical Director: "Fast delivery to California, perfect specs. Will order tons next quarter."
Mike T., Operations Lead: "GMP quality at China prices. Solved our antioxidant issues overnight."
Emily R., Purchasing Manager: "OEM customization was spot-on. 5 stars for Global Technology."
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