26741-53-7

Basic information

• Product Name: Antioxidant 24
• Synonyms: antioxidant 24;Ultranox 626;3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane;BIS-(2,4-DI-TERT-BUTYLPHENYL)PENTAERYTHRITOL DIPHOSPHITE (ULTRANOX 626);2,4,8,10-Tetraoxa-3,9-diphosphaspiro5.5undecane, 3,9-bis2,4-bis(1,1-dimethylethyl)phenoxy-;3,9-Bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecan;4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-bis[2,4-bis(1,1-dimethylethyl)phenoxy]-2;phosphorous acid, cyclic neopentanetetrayl bis(2,4-di-tert-butylphenyl)ester
• CAS NO: 26741-53-7
• Molecular Formula: C₃₃H₅₀O₆P₂
• Molecular Weight: 604.7
• EINECS: 247-952-5
• Product Categories: Industrial/Fine Chemicals;Organics
• Mol File: 26741-53-7.mol
• Article Data: 3

Chemical Properties

• Melting Point: 160-178°C
• Boiling Point: 555.8 °C at 760 mmHg
• Flash Point: 363.9 °C
• Appearance: White powder
• Density: 1.166[at 20℃]
• Vapor Pressure: 8.01E-12mmHg at 25°C
• Storage Temp.: under inert gas (nitrogen or Argon) at 2-8°C
• Solubility: Chloroform (Slightly), Hexanes (Slightly, Heated)
• Water Solubility: 93μg/L at 25℃
• CAS DataBase Reference: Antioxidant 24(CAS DataBase Reference)
• NIST Chemistry Reference: Antioxidant 24(26741-53-7)
• EPA Substance Registry System: Antioxidant 24(26741-53-7)

Safety Data

• Hazardous Substances Data: 26741-53-7(Hazardous Substances Data)

Usage

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.

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.

Uses

Antioxidant 626 is suitable for: polyolefin and olefin copolymers, polycarbonate, polyamide and other engineering plastics, rubber and elastomers, coatings and adhesives.

Flammability and Explosibility

Notclassified

InChI:InChI=1/C33H50O6P2/c1-29(2,3)23-13-15-27(25(17-23)31(7,8)9)38-40-34-19-33(20-35-40)21-36-41(37-22-33)39-28-16-14-24(30(4,5)6)18-26(28)32(10,11)12/h13-18H,19-22H2,1-12H3

Upstream product

• 115-77-5 Pentaerythritol 
• 96-76-4 2,4-di-tert-Butylphenol 
• 7719-12-2 phosphorus trichloride 
• 3643-70-7 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5] undecane 

Downstream Products

• 97994-11-1 3,9-bis[2,4-di-(tert-butyl)phenoxy]-2,4,8,10-tetraoxa-3λ⁵,9λ⁵-diphosphaspiro[5.5]undecane-3,9-dioxide 
• 1448343-88-1 3,9-bis[2,4-di(tert-butyl)phenoxy]-2,4,8,10-tetraoxa-3λ⁵,9λ⁵-diphosphaspiro[5.5]undecane-3,9-disulfide 
• 1448343-89-2 3,9-bis[2,4-di(tert-butyl)phenoxy]-2,4,8,10-tetraoxa-3λ⁵,9λ⁵-diphosphaspiro[5.5]undecane-3,9-diselone 
• 1448343-90-5 3,9-bis[2,4-di(tert-butyl)phenoxy]-2,4,8,10-tetraoxa-3λ⁵,9λ⁵-diphosphaspiro[5.5]undecane-3,9-ditungestonpentacarbonyl 

Relevant articles and documents

Synthetic process of antioxidant 626

The invention discloses a synthetic method of an antioxidant 626, namely bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite. The method disclosed by the invention comprises the following steps: firstly adding a catalyst to a selected solvent, performing stirring, then adding phosphorus trichloride, introducing nitrogen gas, continuously performing stirring, then dropwise adding pentaerythritol, and absorbing the generated hydrogen chloride gas with a sodium hydroxide solution; purifying the reaction product to obtain a dichloropentaerythritol diphosphite solution; and then, dropwise adding the dichloropentaerythritol diphosphite solution to a 2,4-di-tert-butylphenol aqueous solution, introducing nitrogen gas, performing stirring, absorbing the hydrogen chloride gas generated by reaction with the sodium hydroxide solution, and purifying the reaction product to obtain the product. The method disclosed by the invention has the advantages that the adopted raw materials are low in price, the reaction is easy to perform, side reactions are few, the purity of the product is high, the reaction time is short, the storage time of the product is long, the product has good hydrolysis resistance and stability, and furthermore, the yield of the product is also very high.

Process for the preparation of cyclic phosphites

The present invention relates to a process for the preparation of pentaerythritol esters of phosphorous acid derivatives by reacting pentaerythritol with a phosphorous trihalide and a phenol in the presence of a quaternary salt or a polyether. The use