Bromine, Br 2

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Bromine, Br₂
Categories:	Fluid; Pure Element
Material Notes:	CAS Number: 7726-95-6 Physical Form: Red Liquid
Key Words:	Bromine, Br2
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Physical Properties	Metric	English	Comments

Density	3.1028 g/cc	0.11210 lb/in³
Viscosity	0.996 cP @Temperature 20.0 °C	0.996 cP @Temperature 68.0 °F	Dynamic Viscosity
Molecular Weight	159.808 g/mol	159.808 g/mol
Vapor Pressure	0.231099 bar @Temperature 20.0 °C	173.339 torr @Temperature 68.0 °F

Chemical Properties	Metric	English	Comments
Atomic Mass	79.904	79.904	1995
Atomic Number	35	35
X-ray Absorption Edge	0.91994 Å	0.91994 Å	K
	6.925 Å	6.925 Å	L_I
	7.7523 Å	7.7523 Å	L_II
	7.9871 Å	7.9871 Å	L_III
Critical Pressure	103.400 bar	77556.4 torr
Critical Temperature	315 °C	599 °F
Critical Density	1.258 g/cc	0.04545 lb/in³
Critical Molar Volume	127 cm³/mol	7.75 in³/mol
Electronegativity	2.96	2.96	Pauling
Ionic Radius	0.390 Å	0.390 Å	Crystal Ionic Radius for Valence +7
	0.470 Å	0.470 Å	Crystal Ionic Radius for Valence +5
	1.96 Å	1.96 Å	Crystal Ionic Radius for Valence -1

Electrical Properties	Metric	English	Comments
Dielectric Constant	3.15 @Temperature 20.0 °C	3.15 @Temperature 68.0 °F

Thermal Properties	Metric	English	Comments
Heat of Fusion	65.83 J/g	28.32 BTU/lb
Heat of Vaporization	187.5 J/g	80.65 BTU/lb	At Boiling Point
	193.4 J/g @Temperature 25.0 °C	83.20 BTU/lb @Temperature 77.0 °F
Specific Heat Capacity	0.226 J/g-°C	0.0540 BTU/lb-°F
	0.4737 J/g-°C	0.1132 BTU/lb-°F	Liquid
	0.229 J/g-°C @Temperature 25.0 °C	0.0547 BTU/lb-°F @Temperature 77.0 °F	Vapor
Thermal Conductivity	0.123 W/m-K @Temperature 20.0 °C	0.854 BTU-in/hr-ft²-°F @Temperature 68.0 °F
Melting Point	-7.20 °C	19.0 °F
Boiling Point	58.8 °C	138 °F
Heat of Formation	0.000 kJ/mol	0.000 kJ/mol	Liquid
	30.9 kJ/mol	30.9 kJ/mol	Gas

Optical Properties	Metric	English	Comments
Refractive Index	1.659 @Temperature 15.0 °C, Wavelength 589 nm	1.659 @Temperature 59.0 °F, Wavelength 589 nm

Component Elements Properties	Metric	English	Comments
Bromine, Br	100 %	100 %

Descriptive Properties
Antoine's Vapor Pressure A Parameter	15.8441
Antoine's Vapor Pressure B Parameter	2582.32
Antoine's Vapor Pressure C Parameter	-51.56
Antoine's Vapor Pressure Formula	ln π_p = A - B/(T+C)		P in mmHg and T in K
Appearance	Red Liquid
CAS Number	7726-95-6
Critical Compressibility (Zc)	0.27
Dipole moment (p/C.m)	6.671E-29
Dynamic Viscosity Formula	log₁₀ η=A(1/T-1/B)
Dynamic Viscosity Parameter A	387.82
Dynamic Viscosity Parameter B	292.79
Molar Heat Capacity (298K)	36.521 J/mol-K
Molar Heat Capacity of Vapor a Parameter	33.836
Molar Heat Capacity of Vapor b Parameter	0.0112
Molar Heat Capacity of Vapor c Parameter	-1.191E-05
Molar Heat Capacity of Vapor d Parameter	4.531E-09
Molar Heat Capacity of Vapor Formula	C_p = a + bT + cT² + dT³		C_p in J/mol-K
Solubility	Soluble in H₂O

References for this datasheet.

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