- InChI
- InChI=1S/C8H24O4Si4/c1-13(2)9-14(3,4)11-16(7,8)12-15(5,6)10-13/h1-8H3
- InChI Key
- HMMGMWAXVFQUOA-UHFFFAOYSA-N
- Formula
- C8H24O4Si4
- SMILES
-
C[Si]1(C)O[Si](C)(C)O[Si](C)(C
)O[Si](C)(C)O1 - Molecular Weight1
- 296.62
- CAS
- 556-67-2
- Other Names
-
- CO9810
- Cyclotetrasilane, octamethyl
- D4 (octamethylcyclotetrasiloxane)
- NUC Silicone VS 7207
- O9810
- Octamethylcyclotetrasiloxane
- Octamethyltetrasiloxane
- Oktamethylcyklotetrasiloxan
- Cp,liquid : Liquid phase heat capacity (J/mol×K).
- ΔfusH : Enthalpy of fusion at a given temperature (kJ/mol).
- ΔvapH° : Enthalpy of vaporization at standard conditions (kJ/mol).
- ΔvapH : Enthalpy of vaporization at a given temperature (kJ/mol).
- log10WS : Log10 of Water solubility in mol/l.
- logPoct/wat : Octanol/Water partition coefficient.
- Pc : Critical Pressure (kPa).
- Pvap : Vapor pressure (kPa).
- ρc : Critical density (kg/m3).
- ρl : Liquid Density (kg/m3).
- Inp : Non-polar retention indices.
- csound,fluid : Speed of sound in fluid (m/s).
- Tboil : Normal Boiling Point Temperature (K).
- Tc : Critical Temperature (K).
- Tfus : Normal melting (fusion) point (K).
- Ttriple : Triple Point Temperature (K).
- Vc : Critical Volume (m3/kmol).
- Vm : Molar Volume (m3/mol).
- 1: Molecular weight from the IUPAC atomic weights tables.
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Contents
- Physical Properties
- Temperature Dependent Properties
- Datasets
- Correlations
- Similar Compounds
- Mixtures
- Sources
Physical Properties
| Property | Value | Unit | Source |
|---|---|---|---|
| ΔvapH° | [56.10; 57.00] | kJ/mol |
|
| ΔvapH° | 57.00 ± 0.80 | kJ/mol | NIST |
| ΔvapH° | 56.10 | kJ/mol | NIST |
| log10WS | 6.05 | Crippen Calculated Property | |
| logPoct/wat | 2.874 | Crippen Calculated Property | |
| Pc | [1320.00; 1339.59] | kPa |
|
| Pc | 1320.00 ± 20.00 | kPa | NIST |
| Pc | 1339.59 ± 6.86 | kPa | NIST |
| ρc | 295.13 ± 2.94 | kg/m3 | NIST |
| Inp | [994.00; 1022.00] |
|
|
| Inp | 1004.00 | NIST | |
| Inp | 994.00 | NIST | |
| Inp | 1022.00 | NIST | |
| Inp | 1010.00 | NIST | |
| Inp | 1010.00 | NIST | |
| Inp | 1011.00 | NIST | |
| Inp | 1013.00 | NIST | |
| Inp | 1017.00 | NIST | |
| Inp | 1017.00 | NIST | |
| Inp | 1000.00 | NIST | |
| Inp | 1004.00 | NIST | |
| Tboil | [446.20; 448.50] | K |
|
| Tboil | 448.50 ± 0.50 | K | NIST |
| Tboil | 446.20 ± 0.60 | K | NIST |
| Tc | [585.70; 586.50] | K |
|
| Tc | 585.70 ± 0.30 | K | NIST |
| Tc | 586.50 ± 0.20 | K | NIST |
| Tfus | [287.40; 290.65] | K |
|
| Tfus | 290.00 ± 0.10 | K | NIST |
| Tfus | 290.65 ± 0.20 | K | NIST |
| Tfus | 287.40 ± 0.10 | K | NIST |
| Ttriple | [23.76; 290.25] | K |
|
| Ttriple | 290.25 ± 0.02 | K | NIST |
| Ttriple | 23.76 ± 0.04 | K | NIST |
| Vc | [0.984; 1.005] | m3/kmol |
|
| Vc | 1.005 ± 0.001 | m3/kmol | NIST |
| Vc | 0.984 ± 0.003 | m3/kmol | NIST |
| Vm | 3.12e-04 | m3/mol | Thermod... |
Temperature Dependent Properties
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Cp,liquid | [511.50; 568.40] | J/mol×K | [293.15; 425.95] |
|
|
T(K) Liquid phase heat capacity (J/mol×K) 510 520 530 540 550 560 570 300 350 400 | ||||
| Cp,liquid | 511.50 | J/mol×K | 293.15 | Selecte... |
| Cp,liquid | 513.60 | J/mol×K | 298.00 | Selecte... |
| Cp,liquid | 515.80 | J/mol×K | 303.15 | Selecte... |
| Cp,liquid | 517.20 | J/mol×K | 306.25 | Selecte... |
| Cp,liquid | 520.10 | J/mol×K | 313.12 | Selecte... |
| Cp,liquid | 522.70 | J/mol×K | 319.00 | Selecte... |
| Cp,liquid | 524.50 | J/mol×K | 323.25 | Selecte... |
| Cp,liquid | 526.40 | J/mol×K | 327.55 | Selecte... |
| Cp,liquid | 529.10 | J/mol×K | 334.75 | Selecte... |
| Cp,liquid | 530.80 | J/mol×K | 337.88 | Selecte... |
| Cp,liquid | 532.70 | J/mol×K | 342.23 | Selecte... |
| Cp,liquid | 535.20 | J/mol×K | 348.05 | Selecte... |
| Cp,liquid | 538.80 | J/mol×K | 352.20 | Selecte... |
| Cp,liquid | 539.90 | J/mol×K | 358.83 | Selecte... |
| Cp,liquid | 542.20 | J/mol×K | 364.28 | Selecte... |
| Cp,liquid | 543.00 | J/mol×K | 370.25 | Selecte... |
| Cp,liquid | 548.00 | J/mol×K | 377.55 | Selecte... |
| Cp,liquid | 550.10 | J/mol×K | 382.48 | Selecte... |
| Cp,liquid | 552.30 | J/mol×K | 388.65 | Selecte... |
| Cp,liquid | 554.70 | J/mol×K | 393.15 | Selecte... |
| Cp,liquid | 557.70 | J/mol×K | 399.83 | Selecte... |
| Cp,liquid | 560.80 | J/mol×K | 407.15 | Selecte... |
| Cp,liquid | 564.50 | J/mol×K | 415.73 | Selecte... |
| Cp,liquid | 568.40 | J/mol×K | 425.95 | Selecte... |
| ΔfusH | 23.77 | kJ/mol | 290.50 | NIST |
| ΔvapH | [44.10; 48.50] | kJ/mol | [365.50; 415.00] |
|
| ΔvapH | 48.50 | kJ/mol | 365.50 | NIST |
| ΔvapH | 45.60 | kJ/mol | 365.50 | NIST |
| ΔvapH | 44.10 | kJ/mol | 378.50 | NIST |
| ΔvapH | 47.60 | kJ/mol | 415.00 | NIST |
| Pvap | [0.24; 5.11] | kPa | [308.15; 368.15] |
|
|
T(K) Vapor pressure (kPa) 0 1 2 3 4 5 320 340 360 | ||||
| Pvap | 0.24 | kPa | 308.15 | Tempera... |
| Pvap | 0.43 | kPa | 318.15 | Tempera... |
| Pvap | 0.75 | kPa | 328.15 | Tempera... |
| Pvap | 1.26 | kPa | 338.15 | Tempera... |
| Pvap | 2.06 | kPa | 348.15 | Tempera... |
| Pvap | 3.29 | kPa | 358.15 | Tempera... |
| Pvap | 5.11 | kPa | 368.15 | Tempera... |
| ρl | [915.80; 956.03] | kg/m3 | [293.15; 328.15] |
|
|
T(K) Liquid Density (kg/m3) 920 930 940 950 960 300 310 320 | ||||
| ρl | 956.03 | kg/m3 | 293.15 | The mix... |
| ρl | 938.83 | kg/m3 | 308.15 | The mix... |
| ρl | 938.88 | kg/m3 | 308.15 | Volumet... |
| ρl | 933.13 | kg/m3 | 313.15 | The mix... |
| ρl | 933.06 | kg/m3 | 313.15 | Volumet... |
| ρl | 927.38 | kg/m3 | 318.15 | The mix... |
| ρl | 927.34 | kg/m3 | 318.15 | Volumet... |
| ρl | 921.62 | kg/m3 | 323.15 | The mix... |
| ρl | 921.59 | kg/m3 | 323.15 | Volumet... |
| ρl | 915.91 | kg/m3 | 328.15 | The mix... |
| ρl | 915.80 | kg/m3 | 328.15 | Volumet... |
Datasets
Speed of sound, m/s
| Fixed | Measured | |
|---|---|---|
| Temperature, K - Fluid (supercritical or subcritical phases) | Pressure, kPa - Fluid (supercritical or subcritical phases) | Speed of sound, m/s - Fluid (supercritical or subcritical phases) |
| 450.00 | 38.90 | 110.351 |
| 450.00 | 46.70 | 109.656 |
| 450.00 | 57.41 | 108.801 |
| 450.00 | 62.89 | 108.299 |
| 450.00 | 69.33 | 107.727 |
| 465.00 | 31.29 | 113.043 |
| 465.00 | 32.63 | 112.986 |
| 465.00 | 36.51 | 112.753 |
| 465.00 | 40.99 | 112.32 |
| 465.00 | 46.84 | 111.935 |
| 465.00 | 47.85 | 111.913 |
| 465.00 | 49.18 | 111.723 |
| 465.00 | 57.21 | 111.202 |
| 465.00 | 58.99 | 110.976 |
| 465.00 | 61.46 | 110.824 |
| 465.00 | 68.51 | 110.332 |
| 465.00 | 70.69 | 110.062 |
| 465.00 | 73.59 | 109.872 |
| 465.00 | 74.87 | 109.829 |
| 465.00 | 77.48 | 109.53 |
| 465.00 | 81.72 | 109.278 |
| 465.00 | 87.87 | 108.72 |
| 465.00 | 92.89 | 108.286 |
| 465.00 | 97.68 | 107.963 |
| 465.00 | 101.01 | 107.535 |
| 465.00 | 105.11 | 107.277 |
| 465.00 | 106.95 | 107.179 |
| 465.00 | 111.40 | 106.695 |
| 465.00 | 116.93 | 106.3 |
| 465.00 | 121.67 | 105.761 |
| 465.00 | 123.48 | 105.664 |
| 480.00 | 42.70 | 114.022 |
| 480.00 | 54.67 | 113.202 |
| 480.00 | 65.08 | 112.478 |
| 480.00 | 71.30 | 112.038 |
| 480.00 | 85.50 | 111.071 |
| 480.00 | 92.46 | 110.502 |
| 480.00 | 109.21 | 109.241 |
| 480.00 | 118.88 | 108.493 |
| 480.00 | 129.21 | 107.675 |
| 480.00 | 140.39 | 106.769 |
| 480.00 | 152.36 | 105.769 |
| 480.00 | 165.42 | 104.642 |
| 495.00 | 27.45 | 117.135 |
| 495.00 | 36.20 | 116.658 |
| 495.00 | 47.54 | 115.985 |
| 495.00 | 143.41 | 109.744 |
| 495.00 | 159.70 | 108.434 |
| 495.00 | 160.40 | 108.391 |
| 495.00 | 174.53 | 107.346 |
| 495.00 | 186.64 | 106.439 |
| 495.00 | 198.61 | 105.492 |
| 495.00 | 224.52 | 103.408 |
| Reference | ||
Operational condition: Frequency, MHz = 8 (Liquid)
| Fixed | Measured | |
|---|---|---|
| Temperature, K - Liquid | Pressure, kPa - Liquid | Speed of sound, m/s - Liquid |
| 299.79 | 130.00 | 911.09 |
| 299.80 | 520.00 | 913.77 |
| 299.81 | 980.00 | 916.96 |
| 299.81 | 1500.00 | 920.51 |
| 299.82 | 1980.00 | 923.9 |
| 299.83 | 3440.00 | 933.79 |
| 299.85 | 6010.00 | 950.89 |
| 300.15 | 10240.00 | 978.63 |
| 299.67 | 14920.00 | 1006.82 |
| 350.07 | 120.00 | 747.75 |
| 350.06 | 530.00 | 751.64 |
| 350.05 | 960.00 | 755.62 |
| 350.05 | 1480.00 | 760.43 |
| 350.04 | 1960.00 | 764.8 |
| 350.04 | 3530.00 | 778.49 |
| 350.03 | 6210.00 | 800.86 |
| 350.00 | 10200.00 | 832.31 |
| 349.98 | 14970.00 | 866.97 |
| 350.35 | 22660.00 | 915.86 |
| 349.96 | 26230.00 | 939.02 |
| 399.71 | 120.00 | 600.99 |
| 399.70 | 510.00 | 605.91 |
| 399.70 | 1030.00 | 612.25 |
| 399.70 | 1460.00 | 617.43 |
| 399.70 | 2040.00 | 624.18 |
| 399.68 | 3610.00 | 641.86 |
| 399.64 | 6070.00 | 667.98 |
| 399.64 | 10120.00 | 706.83 |
| 399.63 | 15100.00 | 749.46 |
| 399.69 | 19290.00 | 782.02 |
| 399.62 | 19680.00 | 784.97 |
| 449.64 | 130.00 | 461.18 |
| 449.64 | 500.00 | 467.67 |
| 449.63 | 960.00 | 475.36 |
| 449.70 | 1490.00 | 484.22 |
| 449.69 | 1960.00 | 491.86 |
| 449.77 | 3600.00 | 516.36 |
| 449.87 | 5900.00 | 547.45 |
| 450.00 | 10040.00 | 596.17 |
| 450.19 | 15080.00 | 646.97 |
| 450.23 | 16420.00 | 659.13 |
| 499.92 | 330.00 | 321.35 |
| 499.94 | 520.00 | 329.04 |
| 499.92 | 1490.00 | 354.75 |
| 499.91 | 2030.00 | 367.4 |
| 499.88 | 3480.00 | 398.42 |
| 499.88 | 6030.00 | 444.06 |
| 500.00 | 10650.00 | 509.56 |
| 499.93 | 11150.00 | 515.95 |
| 549.61 | 3880.00 | 300.55 |
| 549.56 | 4550.00 | 317.1 |
| 549.55 | 5070.00 | 329.01 |
| 549.54 | 5510.00 | 338.9 |
| 549.97 | 6640.00 | 364.29 |
| Reference | ||
Correlations
| Property | Value | Unit | Temperature (K) | Source |
|---|---|---|---|---|
| Pvap | [1.33; 202.66] | kPa | [333.88; 477.61] |
The Yaw...
|
| Equation | ln(Pvp) = A + B/(T + C) | |||
| Coefficient A | 1.38745e+01 | |||
| Coefficient B | -3.32842e+03 | |||
| Coefficient C | -8.89110e+01 | |||
| Temperature range, min. | 333.88 | |||
| Temperature range, max. | 477.61 | |||
|
T(K) Vapor pressure (kPa) 0 50 100 150 200 350 400 450 | ||||
| Pvap | 1.33 | kPa | 333.88 | Calculated Property |
| Pvap | 3.06 | kPa | 349.85 | Calculated Property |
| Pvap | 6.39 | kPa | 365.82 | Calculated Property |
| Pvap | 12.31 | kPa | 381.79 | Calculated Property |
| Pvap | 22.15 | kPa | 397.76 | Calculated Property |
| Pvap | 37.62 | kPa | 413.73 | Calculated Property |
| Pvap | 60.81 | kPa | 429.70 | Calculated Property |
| Pvap | 94.15 | kPa | 445.67 | Calculated Property |
| Pvap | 140.42 | kPa | 461.64 | Calculated Property |
| Pvap | 202.66 | kPa | 477.61 | Calculated Property |
Similar Compounds
Find more compounds similar to Cyclotetrasiloxane, octamethyl-.
Mixtures
- Cyclotetrasiloxane, octamethyl- + 1,1,3,3-Tetraphenyl-1,3-dimethyldisiloxane
- 1,3-Diphenyltetramethyldisiloxane + Cyclotetrasiloxane, octamethyl-
- Cyclotetrasiloxane, octamethyl- + Heptane
- Carbon dioxide + Cyclotetrasiloxane, octamethyl-
Sources
- Crippen Method
- Crippen Method
- Ideal-gas heat capacities of dimethylsiloxanes from speed-of-sound measurements and ab initio calculations
- The mixing properties of 1,3,5-trimethyl-1,3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane with various organosilicon compounds at different temperatures
- Solubilities of 1,3-dimethyl-1,1,3,3-tetraphenyldisiloxane in different solvents from (288.15 to 313.15) K
- Volumetric and refractive properties of the mixtures of 1,1,3,3-tetramethyl-1,3-diphenyldisiloxane with various organosilicon compounds at T = (308.15 to 328.15) K
- Thermodynamic Properties of Octamethylcyclotetrasiloxane
- Selected Physicochemical Properties of Hexamethylcyclotrisiloxane, Octamethylcyclotetrasiloxane, and Decamethylcyclopentasiloxane
- Temperature-Dependent Vapor Pressure of Selected Cyclic and Linear Polydimethylsiloxane Oligomers
- Thermodynamic Study of Heptane + Silicone Mixtures. Excess Volumes and Enthalpies at 298.15 K
- Vapor Liquid Phase Equilibrium Data of CO2 in Some Physical Solvents from 285.19 K to 313.26 K
- NIST Webbook
- The Yaws Handbook of Vapor Pressure
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