3643-70-7

Basic information

• Product Name: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane
• Synonyms: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane;2,4,8,10-Tetraoxa-3,9-diphosphaspiro(5.5)undecane, 3,9-dichloro-;Dichloro pentaerythritol diphosphite;Einecs 222-870-2
• CAS NO: 3643-70-7
• Molecular Formula: C₅H₈Cl₂O₄P₂
• Molecular Weight: 264.968142
• EINECS: 222-870-2
• Mol File: 3643-70-7.mol
• Article Data: 14

Chemical Properties

• Boiling Point: 309.5°Cat760mmHg
• Flash Point: 141°C
• Appearance: /
• Density: g/cm³
• Vapor Pressure: 0.00116mmHg at 25°C
• CAS DataBase Reference: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane(CAS DataBase Reference)
• NIST Chemistry Reference: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane(3643-70-7)
• EPA Substance Registry System: 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane(3643-70-7)

Safety Data

• Hazardous Substances Data: 3643-70-7(Hazardous Substances Data)

Usage

Uses

Cyclic Diphosphorochloridite Pentaerythritol is an intermediate in the synthesis of 3,9-Bis(octadecyloxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane (B508898), proposed for use as high-performance additives in high-voltage Li-ion batteries.

InChI:InChI=1/C5H8Cl2O4P2/c6-12-8-1-5(2-9-12)3-10-13(7)11-4-5/h1-4H2

Upstream product

• 115-77-5 Pentaerythritol 

Downstream Products

• 80693-00-1 bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite 
• 26741-53-7 3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-tetra-oxa-3,9-diphosphaspiro[5.5]-undecane 
• 18695-71-1 3.9-Bis-(3-phenyl-ureido)-2.4.8.10-tetraoxa-3.9-diphospha-spiro<5.5>undecan-3.9-disulfid 
• 144-35-4 3,9-diphenoxy-2,4,8,10-tetraoxa-3,9-diphospha-spiro[5.5]undecane 
• 7093-41-6 3,9-diethoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro<5.5>undecane 

Relevant articles and documents

Synthesis and thermal properties of spiro phosphorus compounds

Intumescent materials, 3,9-dichloro-2,4,8,10-tetraoxa-3,9-diphosphaspiro- [5,5]-undecane-3,9-dioxide and 3,9-dichloro-2,4,8,10-tetraoxa-3,9- diphosphaspiro-[5,5]-undecane having the capacity to produce dehydrating agent, blowing agent, and undergo carbonization during burning have been synthesized. The thermal behavior of the synthesized materials was investigated using differential thermal analysis, thermal volatilization analysis, programmed vacuum pyrolysis-mass spectrometry, flash pyrolysis-mass spectrometry and off-line pyrolysis-gas chromatography-mass spectrometry. The materials show exothermic degradation after 250 °C. Monitoring the release of hydrogen chloride and water, the blowing agents for the production of carbon foam, clearly indicated the superior performance of the pentavalent phosphorus compound over the trivalent phosphorus compound. The major gaseous degradation products released during pyrolysis showed the presence of sufficient quantities of several alkyl-substituted benzenes and fused aromatics. Suitable degradation mechanism has been proposed and discussed to explain the formation of various organics during thermal degradation.

Preparation method of 3,9 - difluoro -2, 4, 8, 10 - tetraoxygen -3, 9 - diphosphorus spiro [5.5] undecane (by machine translation)

The invention discloses a preparation method of 3, 9 - difluoro -2, 4, 8, 10 - tetraoxygen -3 and 9 - diphosphorus spiro [5.5] undecane, and belongs to the field of organic synthesis. The intermediate 3, 9 - dihalo -2, 4, 8, 10 - tetraoxygen -3, 9 - diphosphorus spiro [5.5] undecane are distilled to obtain 3, 9 - difluoro -2, 4, 8, 10 - tetraoxygen -3, 9 - diphosphorus spiro [5.5] undecane. The method is low in raw material price, simple and convenient to operate and suitable for industrial production. (by machine translation)

A double (2, 4 - dicumylphenyl) quarter [...] phosphite ester preparation method (by machine translation)

The embodiment of the invention discloses a double (2, 4 - dicumylphenyl) quarter [...] phosphite ester preparation method. The reaction temperature - 5 - 10 °C, micro reduced pressure conditions, to pentaerythritol, amine hydrochloride salt catalyst, aromatic hydrocarbon solvent in dropwise phosphorus trichloride, phases up to 85 - 90 °C, pressure reducing reaction 1 hours, stop after the pressure of the nitrogen protection, to obtain [...][...] phosphite ester reaction solution; the above reaction liquid to heating up to 90 - 100 °C of 2, 4 - dicumyl phenol in the aromatic hydrocarbon solvent, pressure reducing reflux reaction for 4 hours, inject the nitrogen, adding and mixing the [...] reaction system becomes alkaline, cooling to room temperature, filter, to get double (2, 4 - dicumylphenyl) quarter [...] phosphite. The invention through the reaction condition, such as temperature, pressure, time, catalyst, the charging sequence and after treatment of the strict control, eventually get the yield high, narrow melting range, low acid value, excellent hydrolysis resistance performance of high performance products. (by machine translation)