Acetonitrile, CH 3 CN

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Acetonitrile, CH₃CN
Categories:	Fluid; Solvent
Key Words:	CH3CN
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Physical Properties	Metric	English	Comments

Density	0.782 g/cc @Temperature 20.0 °C	0.0283 lb/in³ @Temperature 68.0 °F
Viscosity	0.353 cP @Temperature 20.0 °C	0.353 cP @Temperature 68.0 °F	Dynamic Viscosity
Molecular Weight	41.053 g/mol	41.053 g/mol
Vapor Pressure	0.090323 bar @Temperature 20.0 °C	67.748 torr @Temperature 68.0 °F
Surface Tension	27.22 dynes/cm @Temperature 20.0 °C	27.22 dynes/cm @Temperature 68.0 °F

Chemical Properties	Metric	English	Comments
Critical Pressure	48.3 bar	36300 torr
Critical Temperature	275 °C	527 °F
Critical Density	0.237 g/cc	0.00856 lb/in³
Critical Molar Volume	173 cm³/mol	10.6 in³/mol

Electrical Properties	Metric	English	Comments
Dielectric Constant	36.64 @Temperature 20.0 °C	36.64 @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
Heat of Vaporization	764.4 J/g	328.8 BTU/lb
Specific Heat Capacity	1.272 J/g-°C @Temperature 25.0 °C	0.3040 BTU/lb-°F @Temperature 77.0 °F	Vapor
Thermal Conductivity	0.190 W/m-K @Temperature 20.0 °C	1.32 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	-43.9 °C	-47.0 °F
Boiling Point	81.7 °C	179 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.344 @Wavelength 589.3 nm	1.344 @Wavelength 589.3 nm	n_D

Descriptive Properties
Antoine's Vapor Pressure A Parameter	16.2874
Antoine's Vapor Pressure B Parameter	2945.47
Antoine's Vapor Pressure C Parameter	-49.15
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)		P in mmHg and T in K
CAS registry number (CARN)	75-05-8
Chemical Formula	CH₃CN
Critical Compressibility (Zc)	0.184
Dipole moment (p/C.m)	1.167E-27
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	334.91
Dynamic Viscosity Parameter B	210.05
Henry's Law Constant (atm m³/mol)	2E-05
Molar Heat Capacity (298K)	52.202 J/mol-K
Molar Heat Capacity of Vapor a Parameter	20.4681
Molar Heat Capacity of Vapor b Parameter	0.1195
Molar Heat Capacity of Vapor c Parameter	-4.489E-05
Molar Heat Capacity of Vapor d Parameter	3.201E-09
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³		C_p in J/mol-K
UN Number	1648
UV cut-off (nm)	190

References for this datasheet.

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