Octaphenylcyclotetrasiloxane CAS546-56-5

Details:

Density 1.2 ± 0.1 g/cm3
Boiling point 334 ° C
Melting point 196-198 ° C (lit.)
Molecular formula C48H40O4Si4
Molecular weight 793.171
Flash point 200 ° C
Accurate quality 792.200378
PSA 36.92000
LogP 5.09280
Appearance: White powder
Refractive index 1.661
Storage conditions
Store in a cool, dry, and well ventilated warehouse. Keep away from sparks and heat sources. Prevent direct sunlight. Packaging sealing. It should be stored separately from acids and edible chemicals, and mixed storage should be avoided. The storage area should be equipped with suitable materials to contain leaks.
Stability
Under the action of trace amounts of sodium silicate and potassium silicate, intramolecular Si-O-Si bonds break and rearrange, forming a mixture of direct polysiloxane and cyclic siloxane. This catalytic fracture rearrangement process has equilibrium characteristics, and at the same time as the ring opening polymerization of the ring body into polymer, macromolecular fracture degradation also occurs. It reacts with excess sodium hydroxide methanol solution to produce sodium Diphenylsilanediol.
Insoluble in water
Molecular structure
1. Molar refractive index: 240.31
2. Molar volume (m3/mol): 654.6
3. Isometric volume (90.2K): 1721.2
4. Surface tension (dyne/cm): 47.7
5. Polarization rate (10-24cm3): 95.26
Computational chemistry
1. Reference value for hydrophobic parameter calculation (XlogP): None
2. Number of hydrogen bond donors: 0
3. Number of hydrogen bond receptors: 4
4. Number of rotatable Chemical bond: 8
5. Number of Tautomer: none
6. Topological molecule Polar surface area 36.9
7. Number of heavy atoms: 56
8. Surface charge: 0
9. Complexity: 906
10. Number of Isotope Atoms: 0
11. Determine the number of atomic structure centers: 0
12. Number of uncertain atomic structure centers: 0
13. Determine the number of Chemical bond stereo centers: 0
14. Number of uncertain Chemical bond structure centers: 0
15. Number of Covalent bond units: 1

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