Acetonitrile (data page)
This page provides supplementary chemical data on acetonitrile.
Material Safety Data Sheet[]
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source and follow its directions.
Structure and properties[]
Structure and properties | |
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Index of refraction, nD | 1.344 at 20.0 °C [1] |
Abbe number | ? |
Dielectric constant, εr | 36.64 ε0 at 20 °C [1] |
Dipole Moment, | 3.84 D |
Bond strength | ? |
Bond length | ? |
Bond angle | ? |
Magnetic susceptibility | ? |
Viscosity[2] | 0.441 mPa·s at 0 °C 0.343 mPa·s at 25 °C |
Surface tension[2] | 29.29 dyn/cm |
Thermodynamic properties[]
Phase behavior | |
---|---|
Triple point[3] | 229.32 K (−43.83 °C), 167 Pa |
Critical point | 545 K (272 °C), 4.87 MPa |
Std enthalpy change of fusion, ΔfusH |
8.167 kJ/mol (crystal I → liq) |
Std entropy change of fusion, ΔfusS |
35.61 J/(mol·K) (crystal I → liq) |
Std enthalpy change of vaporization, ΔvapH |
33.225 kJ/mol at 25 °C 29.75 at 81.6 °C (BP) |
Std entropy change of vaporization, ΔvapS |
111.44 J/(mol·K) at 25 °C |
Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol at 25 °C |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | 92.36 J/(mol K)at 298.15 K |
, ΔtrsH |
0.8979 kJ/mol at −56.2 °C (crystal II → crystal I) |
, ΔtrsS |
4.14 J/(mol·K) at −56.2 °C (crystal II → crystal I) |
Liquid properties | |
Std enthalpy change of formation, ΔfH |
−40.56 kJ/mol |
Standard molar entropy, S |
149.62 J/(mol K) |
Enthalpy of combustion, ΔcH |
−1256.33 kJ/mol |
Heat capacity, cp | 91.7 J/(mol K) at 25 °C |
Gas properties | |
Std enthalpy change of formation, ΔfH |
−74.04 kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | ? J/(mol K) |
Vapor pressure of liquid[]
P in mm Hg | 1 | 10 | 40 | 100 | 400 | 760 | |
T in °C | −47.0(s) | −16.3 | 7.7 | 27.0 | 62.5 | 81.8 |
Table data obtained from CRC Handbook of Chemistry and Physics, 44th ed. The "(s)" notation indicates temperature of solid/vapor equilibrium. Otherwise the data is temperature of liquid/vapor equilibrium.
![](http://upload.wikimedia.org/wikipedia/commons/5/51/LogAcetonitrileVaporPressure.png)
Distillation data[]
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Spectral data[]
UV-Vis | |||||||||||||||||||||||||||||||||||||
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λmax | ? nm | ||||||||||||||||||||||||||||||||||||
Extinction coefficient, ε | ? | ||||||||||||||||||||||||||||||||||||
IR | |||||||||||||||||||||||||||||||||||||
Major absorption bands[5] |
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NMR | |||||||||||||||||||||||||||||||||||||
Proton NMR | |||||||||||||||||||||||||||||||||||||
Carbon-13 NMR | |||||||||||||||||||||||||||||||||||||
Other NMR data | |||||||||||||||||||||||||||||||||||||
MS | |||||||||||||||||||||||||||||||||||||
Masses of main fragments |
References[]
- ^ a b "Sigma Aldrich Solvent Center". Retrieved 22 May 2014.
- ^ a b c "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. Archived from the original on 3 June 2007. Retrieved 15 May 2007.
- ^ Vapor Pressures of Acetonitrile Determined by Comparative Ebulliometry, Michael B. Ewing* and Jesus C. Sanchez Ochoa, Journal of Chemical & Engineering Data 2004 49 (3), 486-491
- ^ a b c d "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. Retrieved 15 May 2007.
- ^ "Spectral Database for Organic Compounds". Advanced Industrial Science and Technology. Archived from the original (Queriable database) on 5 May 2006. Retrieved 7 June 2007.
- "NIST Standard Reference Database". Archived from the original on 23 May 2007. Retrieved 15 May 2007.
This box:
- Except where noted otherwise, data relate to Standard temperature and pressure.
- Reliability of data general note.
Categories:
- Chemical data pages