Methanol (CH 3 OH; Methyl Alcohol)

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Methanol (CH₃OH; Methyl Alcohol)
Categories:	Fluid; Solvent
Key Words:	CH3OH
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Physical Properties	Original Value	Comments

Density	0.7914 g/cc @Temperature 20.0 °C
Viscosity	0.544 cP @Temperature 25.0 °C
	0.58 cP @Temperature 20.0 °C	Dynamic Viscosity
Molecular Weight	32.04 g/mol
Vapor Pressure	0.09869 atm @Temperature 15.2 °C
	97.3 torr @Temperature 20.0 °C
Surface Tension	22.07 dynes/cm @Temperature 25.0 °C	Gamma
	22.3 dynes/cm @Temperature 20.0 °C

Chemical Properties	Original Value	Comments
Critical Pressure	79.7829 atm
Critical Temperature	239.38 °C
Critical Density	0.274 g/cc
Critical Molar Volume	117 cm³/mol

Electrical Properties	Original Value	Comments
Dielectric Constant	32.63

Thermal Properties	Original Value	Comments
Heat of Fusion	100.3 J/g	Enthalpy of fusion at normal melting point
Heat of Vaporization	1099 J/g	Enthalpy of vaporization at normal boiling temperature
Specific Heat Capacity	2.542 J/g-°C
	1.367 J/g-°C @Temperature 25.0 °C	Vapor
Thermal Conductivity	0.200 W/m-K @Temperature 25.0 °C
	0.0262 W/m-K @Pressure 0.100 MPa, Temperature 127 °C	gas
	0.0386 W/m-K @Pressure 0.100 MPa, Temperature 227 °C	gas
	0.0530 W/m-K @Pressure 0.100 MPa, Temperature 327 °C	gas
Melting Point	-97.53 °C	At atmospheric pressure (760 torr)
Boiling Point	64.6 °C @Pressure 0.101 MPa

Optical Properties	Original Value	Comments
Refractive Index	1.3288 @Temperature 20.0 °C, Wavelength 589.3 nm	Na D line

Descriptive Properties
Antoine's Vapor Pressure A Parameter	18.5875
Antoine's Vapor Pressure B Parameter	3626.55
Antoine's Vapor Pressure C Parameter	-34.29
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)	P in mmHg and T in K
CAS registry number (CARN)	67-56-1
Chemical Formula	CH₄O
Critical Compressibility (Zc)	0.224
Dipole moment (p/C.m)	5.671E-28
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	555.3
Dynamic Viscosity Parameter B	260.64
Henry's Law Constant (atm m³/mol)	4.45E-06
Molar Heat Capacity (298K)	43.812 J/mol-K
Molar Heat Capacity of Vapor a Parameter	21.1376
Molar Heat Capacity of Vapor b Parameter	0.0709
Molar Heat Capacity of Vapor c Parameter	2.585E-05
Molar Heat Capacity of Vapor d Parameter	-2.85E-08
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³	C_p in J/mol-K
UN Number	1230
UV cut-off (nm)	210

References for this datasheet.

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VORG029 / 74540

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