2,3,5-Triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide is a complex organic compound with the molecular formula C27H21O2P. It is a derivative of oxaphosphole, a heterocyclic compound containing oxygen and phosphorus atoms. The structure of 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide features a six-membered ring with alternating oxygen and phosphorus atoms, and three phenyl groups attached to the carbon atoms at positions 2, 3, and 5. 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide is of interest in the field of organic chemistry, particularly in the synthesis of phosphorus-containing heterocycles, which have potential applications in materials science, pharmaceuticals, and agrochemicals. The specific properties and reactivity of 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide can be influenced by the electronic and steric effects of the phenyl substituents, making it a subject of study for understanding the behavior of phosphorus-containing compounds in various chemical transformations.

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Basic information
1. Product Name: 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide
2. Synonyms:
3. CAS NO:4643-56-5
4. Molecular Formula:
5. Molecular Weight: 332.339
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide(CAS DataBase Reference)
10. NIST Chemistry Reference: 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide(4643-56-5)
11. EPA Substance Registry System: 2,3,5-triphenyl-2,3-dihydro-[1,2]oxaphosphole 2-oxide(4643-56-5)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 4643-56-5(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 4643-56-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,4 and 3 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 4643-56:
(6*4)+(5*6)+(4*4)+(3*3)+(2*5)+(1*6)=95
95 % 10 = 5
So 4643-56-5 is a valid CAS Registry Number.

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