HYDROGEN BROMIDE* - (10035-10-6)

Introduction

Name: hydrogen bromide*; hydrobromic acid
* IUPAC
CAS Number: 10035-10-6
Chemical Formula: HBr
Molar Mass: 80.91194 g
Mass Percent: H 1.2457 %; Br 98.754 % 

Classification

• inorganic

Uses/Function

• "M[anu]f[acturin]g organic and inorganic bromides, hydrobromic acid, as reducing agent and as catalyst in controlled oxidations, in the alkylation of aromatic comp[oun]ds, in the isomerization of conjugated diolefins." 1

Physical Properties

Melting Point:*
-86.80°C 2 = 186.35 K = -124.24°F
-86.86°C 3 = 186.29 K = -124.348°F
Boiling Point:*
-66.38°C 2 = 206.77 K = -87.484°F
-66.72°C 3 = 206.43 K = -88.096°F
Density (g/cm3):
0.003307 at 25°C 2
0.003388 at 20°C 3
* - 1 atm pressure

Solubility

Qualitative:
soluble:  3
very soluble:  3

Bonding

Bonding: polar covalent
Ionic Character: 23.03 %

Thermochemistry

ΔHf° (g): -8.71 kcal/mol 4 = -36.44 kJ/mol
ΔHf° (g): -8.68 kcal/mol = -36.3 kJ/mol 5
S° (g): 47.47 cal/(mol•K) 6 = 198.61 J/(mol•K)
S° (g): 47.49 cal/(mol•K) = 198.7 J/(mol•K) 7
ΔGf° (g): -12.79 kcal/mol 8 = -53.51 kJ/mol
ΔGf° (g): -12.76 kcal/mol = -53.4 kJ/mol 9

Reactions

Safety Information

NFPA 704 Ratings:
Health: 3 - Short exposure could cause serious temporary or moderate residual injury.
Flammability: 0 - Will not burn.
Reactivity: 0 - Normally stable, even under fire exposure conditions, and is not reactive with water.

For More Information

Sources

(1) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 4814.
(2) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 4-60.
(3) - Dean, John A. Lange's Handbook of Chemistry, 11th ed.; McGraw-Hill Book Company: New York, NY, 1973; p 4-58.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(5) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-8.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(7) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-8.
(8) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(9) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-8.
(10) - T > -692.288618894124
(11) - T < 6650.82108902334
(12) - T > -791.800012076565
(13) - T > -236.666029439878
(14) - T > 925.953249980586
(15) - T > -101.960548833579
(16) - T > -107.67666880012
(17) - T < 11621.857107294