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Ultranox 626

Ultranox 626 structure

CAS No:
26741-53-7
Formula:
C33H50O6P2
Chemical Name:
Ultranox 626
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
Categories:
Catalyst and Auxiliary > Antioxidants

Description

DryPowder; DryPowder, OtherSolid; OtherSolid; PelletsLargeCrystals

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.

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.

Ultranox 626 Basic Attributes

Molecular Weight：

604.69

Exact Mass：

604.69

EC Number：

247-952-5

UNII：

GV29P0K7AC

TSCA：

TSCA listed

DSSTox ID：

DTXSID2027911

Color/Form：

White to Off-White

HScode：

2920.29.0000

Characteristics

PSA：

55.4

XLogP3：

9.9

Appearance：

DryPowder; DryPowder, OtherSolid; OtherSolid; PelletsLargeCrystals

Density：

1.166[at 20℃]

Melting Point：

160-178°C

Boiling Point：

555.8±50.0 °C(Predicted)

Flash Point：

363.9±30.4 °C

Water Solubility：

93μg/L at 25℃

Vapor Pressure：

0Pa at 25℃

Flammability characteristics：

Not classified

Critical Temperature & Pressure：

under inert gas (nitrogen or Argon) at 2-8°C

Safety Information

Precautionary statement(s)：

P261, P264, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P391, P403+P233, P405, P501

Hazard Statements：

H315

GHS Classification：

|Warning|H315 (44.89%): Causes skin irritation [Warning Skin corrosion/irritation]|P261, P264, P271, P273, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P391, P403+P233, P405, and P501|Aggregated GHS information provided by 561 companies from 16 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Ultranox 626 Use and Manufacturing

Methods of Manufacturing

(3) The product of the product dichloropentaerythritol diphosphite obtained in the step (2) is added dropwise to an aqueous solution of 2, 4-di-tert-butylphenol having a concentration of 0.6 mol/L, 2, 4-di-tert-butyl The molar ratio of phenol and dichloropentaerythritol diphosphite is 2.30:1, stirred by nitrogen, stirring speed is 800 rpm, and reacted at 60 ° C for 2 h, the hydrogen chloride gas formed by the reaction is sodium hydroxide solution. absorb;(4) The solvent is distilled off under reduced pressure at a temperature of 100 ° C and a pressure of 0.06 MPa, and then an appropriate amount of isopropanol is added, and the product is crystallized by stirring;(5) The product obtained in the step (4) is suction-filtered to obtain a white solid powder, which is bis(2, 4-di-tert-butylphenyl)pentaerythritol diphosphite.

Uses

It is widely used in polymer materials such as PE, PP, PS, polyamide, polycarbonate, ABS after compounding with phenolic antioxidant

Antioxidants / Stabilisers

Adhesives and sealants

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

Production

1,000,000 - 10,000,000 lb

Manufacturing Info：

Paint and coating manufacturing|2,4,8,10-Tetraoxa-3,9-diphosphaspiro[5.5]undecane, 3,9-bis[2,4-bis(1,1-dimethylethyl)phenoxy]-: ACTIVE

Computed Properties

Molecular Weight:604.7
XLogP3:9.9
Hydrogen Bond Acceptor Count:6
Rotatable Bond Count:8
Exact Mass:604.30826331
Monoisotopic Mass:604.30826331
Topological Polar Surface Area:55.4
Heavy Atom Count:41
Complexity:764
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

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