Formic acid (Methanoic acid), HCOOH

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Formic acid (Methanoic acid), HCOOH
Categories:	Fluid; Solvent
Key Words:	HCOOH
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Physical Properties	Metric	English	Comments

Density	1.226 g/cc @Temperature 20.0 °C	0.04429 lb/in³ @Temperature 68.0 °F
Viscosity	1.773 cP @Temperature 20.0 °C	1.773 cP @Temperature 68.0 °F	Dynamic Viscosity
Molecular Weight	46.03 g/mol	46.03 g/mol
Vapor Pressure	0.044579 bar @Temperature 20.0 °C	33.437 torr @Temperature 68.0 °F
Surface Tension	37.58 dynes/cm @Temperature 20.0 °C	37.58 dynes/cm @Temperature 68.0 °F

Chemical Properties	Metric	English	Comments
Critical Temperature	307 °C	585 °F

Electrical Properties	Metric	English	Comments
Dielectric Constant	58.5 @Temperature 20.0 °C	58.5 @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
Heat of Vaporization	476 J/g	205 BTU/lb
Specific Heat Capacity	2.152 J/g-°C	0.5143 BTU/lb-°F
	0.982 J/g-°C @Temperature 25.0 °C	0.235 BTU/lb-°F @Temperature 77.0 °F	Vapor
Thermal Conductivity	0.274 W/m-K @Temperature 20.0 °C	1.90 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	8.27 °C	46.9 °F
Boiling Point	100.56 °C	213.01 °F

Optical Properties	Metric	English	Comments
Refractive Index	1.369 @Wavelength 589.3 nm	1.369 @Wavelength 589.3 nm	n_D

Descriptive Properties
Antoine's Vapor Pressure A Parameter	16.9882
Antoine's Vapor Pressure B Parameter	3599.58
Antoine's Vapor Pressure C Parameter	-26.09
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)		P in mmHg and T in K
CAS registry number (CARN)	64-18-6
Chemical Formula	HCOOH
Critical Compressibility (Zc)	0
Dipole moment (p/C.m)	5.003E-28
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	729.35
Dynamic Viscosity Parameter B	325.72
Henry's Law Constant (atm m³/mol)	1.67E-07
Molar Heat Capacity (298K)	45.224 J/mol-K
Molar Heat Capacity of Vapor a Parameter	11.7068
Molar Heat Capacity of Vapor b Parameter	0.1357
Molar Heat Capacity of Vapor c Parameter	-8.406E-05
Molar Heat Capacity of Vapor d Parameter	2.015E-08
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³		C_p in J/mol-K
UN Number	1779

References for this datasheet.

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