9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide Chemical Properties

Melting point:

119°C

Boiling point:

399.7±25.0 °C(Predicted)

vapor pressure 

0.004Pa at 25℃

storage temp. 

Sealed in dry,Room Temperature

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

Solid

color 

White to Off-White

Water Solubility 

3.574g/L at 25℃

InChI

InChI=1S/C12H9O2P/c13-15-12-8-4-2-6-10(12)9-5-1-3-7-11(9)14-15/h1-8,15H

InChIKey

VBQRUYIOTHNGOP-UHFFFAOYSA-N

SMILES

O1C2=CC=CC=C2C2=CC=CC=C2P1=O

LogP

1.87

CAS DataBase Reference

35948-25-5(CAS DataBase Reference)

EPA Substance Registry System

6H-Dibenz[c,e][1,2]oxaphosphorin, 6-oxide (35948-25-5)

Safety Information

Risk Statements 

36/37/38

Safety Statements 

26-36/37/39

HS Code 

2934999090

9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide Usage And Synthesis

Uses

9,10-Dihydro-9-oxa-10-phosphaphenanthrene 10-Oxide is an high effective componant of flame retardant epoxy resins.

Flammability and Explosibility

Non flammable

Synthesis

General procedure for the synthesis of 9,10-dihydro-9-oxa-10-phosphaphenanthrene from 10-chloro-9,10-dihydro-9-oxa-10-phosphaphenanthrene: 10 g of 6-chloro-6H-dibenzo[c,e][1,2]oxaphosphorine (0.0426 mol), 1.2 g of hydrochloric acid (0.0335 mol), and 2.1 g of water were added to a reactor and stirred for 5 minutes to form a homogeneous solution. The reaction mixture was heated at 80 °C for 1 h. Upon completion of the reaction, the system was divided into an organic layer and an aqueous layer. The temperature of the organic layer was maintained at 80 °C, and the organic layer was separated and transferred to another reactor. Reduced pressure distillation was carried out at 165 °C and 0.3 mbar to give 9.03 g of the white solid product 9,10-dihydro-9-oxa-10-phospha-phenanthrene-10-oxide [Yield: 98%; Color: 8 Hazen; Purity: 99.25% (major component: minor component = 99.25%: 0.75%); Melting point: 122.13 °C (DSC peak)] .

References

[1] Patent: US2011/34717, 2011, A1. Location in patent: Page/Page column 3
[2] Patent: US2007/173659, 2007, A1. Location in patent: Page/Page column 5
[3] J. Gen. Chem. USSR (Engl. Transl.), 1972, vol. 42, p. 88 - 90
[4] Zhurnal Obshchei Khimii, 1972, vol. 42, p. 93 - 96
[5] Heterocycles, 2011, vol. 83, # 4, p. 743 - 753

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