Ultranox 626
- CAS No.
- 26741-53-7
- Chemical Name:
- Ultranox 626
- Synonyms
- antioxidant 24;THP-24;Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite;mark pep 24;ADK Stab PEP 24;Bis-(2,4-di-tert-butylphenyl)-pentaerythrityl diphosphite;Bis-(2,4-di-tert-butyl-pheny)-phosphiterythritol diphosphite;AN 626;AO-626;Ultranox 626
- CBNumber:
- CB0855183
- Molecular Formula:
- C33H50O6P2
- Molecular Weight:
- 604.69
- MDL Number:
- MFCD00071521
- MOL File:
- 26741-53-7.mol
- MSDS File:
- SDS
- TDS File:
- TDS
| Product description | Number | Pack Size | Price |
| 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane >95.0%(GC) | B5664 | 5g | $42 |
| 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane >95.0%(GC) | B5664 | 25g | $125 |
| AntiOxidant 24 | FA40363 | 250g | $267.5 |
| AntiOxidant 24 | FA40363 | 500g | $400 |
| AntiOxidant 24 | FA40363 | 1000g | $580 |
| More product size | |||
| Melting point | 160-178°C |
|---|---|
| Boiling point | 555.8±50.0 °C(Predicted) |
| Density | 1.166[at 20℃] |
| vapor pressure | 0Pa at 25℃ |
| storage temp. | under inert gas (nitrogen or Argon) at 2-8°C |
| solubility | Chloroform (Slightly), Hexanes (Slightly, Heated) |
| form | Solid |
| color | White to Off-White |
| Water Solubility | 93μg/L at 25℃ |
| Stability | Hygroscopic |
| InChIKey | AIBRSVLEQRWAEG-UHFFFAOYSA-N |
| SMILES | C1C2(COP(OC3=CC=C(C(C)(C)C)C=C3C(C)(C)C)OC2)COP(OC2=CC=C(C(C)(C)C)C=C2C(C)(C)C)O1 |
| LogP | 10.9 at 25℃ |
| Indirect Additives used in Food Contact Substances | PHOSPHOROUS ACID, CYCLIC NEOPENTANETETRAYL BIS(2,4-DI-TERT-BUTYLPHENYL) ESTER |
| CAS DataBase Reference | 26741-53-7(CAS DataBase Reference) |
| FDA 21 CFR | 178.2010(Antioxidants and/or stabilizers for polymers) |
| EWG's Food Scores | 1 |
| FDA UNII | GV29P0K7AC |
| EPA Substance Registry System | Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite (26741-53-7) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS09 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H410 | |||||||||
| Precautionary statements | P273-P391-P501 | |||||||||
| TSCA | TSCA listed | |||||||||
| HS Code | 2920.29.0000 | |||||||||
| REACH Registrations | Active | |||||||||
| NFPA 704 |
|
Ultranox 626 price More Price(65)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| TCI Chemical | B5664 | 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane >95.0%(GC) | 26741-53-7 | 5g | $42 | 2026-04-30 | Buy |
| TCI Chemical | B5664 | 3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane >95.0%(GC) | 26741-53-7 | 25g | $125 | 2026-04-30 | Buy |
| Biosynth | FA40363 | AntiOxidant 24 | 26741-53-7 | 250g | $267.5 | 2026-06-04 | Buy |
| Biosynth | FA40363 | AntiOxidant 24 | 26741-53-7 | 500g | $400 | 2026-06-04 | Buy |
| Biosynth | FA40363 | AntiOxidant 24 | 26741-53-7 | 1000g | $580 | 2026-06-04 | Buy |
Ultranox 626 Chemical Properties,Uses,Production
Appearance
Ultranox 626 is a white powder or granule.
Application
Antioxidant 626 (ultranox 626) is Approved by the FDA for food contact applications under 21CFRl78.2010 covering antioxidants and/or stabilizers for poly-mers.
Features
Ultranox 626 (Antioxidant 24, Irgafos 126) is suitable for polyolefins, polyesters, styrenes, engineering thermoplastics, PVC, elastomers and adhesives. Its products have excellent color stability, reduced polymer degradation, low dosage and higher phosphorus content than competitive phosphite antioxidants. It has synergistic effects when used with light stabilizers such as benzophenone and benzotriazole.
Description
Antioxidant 626 is a white to off-white powdery substance with low volatility and higher efficiency. It is often used in combination with hindered phenolic antioxidants.
Characteristics
Excellent colour stability during compounding, fabrication and end-use.
Reduction in polymer degradation during processing.
Improved gas fading performance in many applications.
High performance at low loading levels for more cost-effective formulations.
Higher phosphorous content than competitive phosphite antioxidants.
Synergism when used with light stabilizers such as benzophenones and benzotriazoles.
Uses
Antioxidant 626 is suitable for: polyolefin and olefin copolymers, polycarbonate, polyamide and other engineering plastics, rubber and elastomers, coatings and adhesives.
Definition
Ultranox 626 is a solid organophosphite antioxidant that improves gas fading performance and color stability during compounding, fabrication, and end use. It delivers high performance at low loading rates, making this a cost-effective addition to polymer formulas. Ultranox 626 synergizes with benzophenone and benzotriazole light stabilizers. It is so effective that it can replace another phosphite antioxidant in your formula and deliver equivalent performance at a significantly lower dosing rate.
Flammability and Explosibility
Not classified
Synthesis
96-76-4
![3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane](/CAS/GIF/3643-70-7.gif)
3643-70-7
26741-53-7
(3) The product dichloropentaerythritol diphosphite obtained from step (2) was dropwise added to a 0.6 mol/L aqueous solution of 2,4-di-tert-butylphenol. The molar ratio of 2,4-di-tert-butylphenol to dichloropentaerythritol diphosphite was maintained at 2.30:1. The mixture was stirred under nitrogen at a speed of 800 rpm and reacted at 60°C for 2 hours. The hydrogen chloride gas generated during the reaction was absorbed by a sodium hydroxide solution. (4) The solvent was removed by vacuum distillation under reduced pressure at 100°C and 0.06 MPa. An appropriate amount of isopropanol was then added to the residue, and the mixture was stirred to crystallize the product. (5) The reaction mixture obtained from step (4) was subjected to suction filtration to yield a white solid powder, identified as bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite.
References
[1] Patent: CN108250240, 2018, A. Location in patent: Paragraph 0034; 0037; 0038; 0106; 0108; 0110; 0112; 0114
Ultranox 626 Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Qingdao Truelight functional Material Technology Co., Ltd. | +86-13573844393 | songjames@truelightchem.com | China | 222 | 58 |
| Shanghai Tiandui New Material Co., Ltd | +8615921093949 | tianduichemical@shtiandui.com | China | 60 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615350571055 | Sibel@chuanghaibio.com | China | 8738 | 58 |
| Shaanxi Dideu Medichem Co. Ltd | +8617392709771 | 1097@dideu.com | China | 3992 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-86-13131129325 +8613131129325 | sales1@chuanghaibio.com | China | 5228 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615531151365 | mina@chuanghaibio.com | China | 18126 | 58 |
| Henan Fengda Chemical Co., Ltd | +86-371-86557731 +86-13613820652 | info@fdachem.com | China | 20122 | 58 |
| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 | admin@zlchemi.com | China | 3692 | 58 |
| Guangzhou Xijia New Materials Co.,Ltd | +undefined13650882421 | ebswax@163.com | China | 98 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21587 | 55 |
View Lastest Price from Ultranox 626 manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-06-05 | Antioxidant 24
26741-53-7
|
1KG | 95%min | 1000kg | WUHAN FORTUNA CHEMICAL CO., LTD | ||
 |
2026-06-02 | antioxidant AN 626
26741-53-7
|
25KG | 98% | 20tons | QINGDAO JADE NEW MATERIAL TECNOLOGY CO.,LTD | ||
 |
2026-05-28 | Ultranox 626
26741-53-7
|
$2.00-5.00 | 1KG | 99% | 10000kg | Hebei Chuanghai Biotechnology Co,.LTD |
-
- Antioxidant 24
26741-53-7
- $0.00
- 95%min
- WUHAN FORTUNA CHEMICAL CO., LTD
-
- antioxidant AN 626
26741-53-7
- $0.00
- 98%
- QINGDAO JADE NEW MATERIAL TECNOLOGY CO.,LTD
-
- Ultranox 626
26741-53-7
- $2.00-5.00
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
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