ETHYL BROMIDE - (74-96-4)

Introduction

Name: ethyl bromide; bromoethane
* IUPAC
CAS Number: 74-96-4
Chemical Formula: C2H5Br or CH3CH2Br
Molar Mass: 108.9651 g
State of Matter: colorless liquid
Mass Percent: C 22.045 %; H 4.6250 %; Br 73.329 % 

Classification

• organic • alkane

Uses/Function

• "Ethylating agent in organic synthesis; as refrigerant. Formerly used as a topical and inhalation anesthetic." 1

Physical Properties

Melting Point:*
-118.6°C 2 = 154.55 K = -181.48°F
Boiling Point:*
38.5°C 2 = 311.65 K = 101.3°F
Density (g/cm3):
1.4604 at 20°C 2
* - 1 atm pressure

Solubility

Qualitative:
slightly soluble:  2
miscible:  • • 2

Bonding

Double Bonds: 0
Triple Bonds: 0
Sigma Bonds: 7
Pi Bonds: 0
Total: 7
Carboxyl Groups: 0
Hydroxyl Groups: 0
Hybridization: all carbons are sp3

Thermochemistry

ΔHf° (ℓ): -21.63 kcal/mol = -90.5 kJ/mol 3
ΔHf° (g): -14.79 kcal/mol = -61.9 kJ/mol 3
ΔHf° (ℓ): -21.99 kcal/mol 4 = -92.01 kJ/mol
ΔHf° (g): -15.30 kcal/mol 4 = -64.02 kJ/mol
S° (ℓ): 47.49 cal/(mol•K) = 198.7 J/(mol•K) 5
S° (g): 68.52 cal/(mol•K) = 286.7 J/(mol•K) 5
S° (ℓ): 47.5 cal/(mol•K) 6 = 198.74 J/(mol•K)
S° (g): 68.71 cal/(mol•K) 6 = 287.48 J/(mol•K)
ΔGf° (ℓ): -6.17 kcal/mol = -25.8 kJ/mol 7
ΔGf° (g): -5.71 kcal/mol = -23.9 kJ/mol 7
ΔGf° (ℓ): -6.64 kcal/mol 8 = -27.78 kJ/mol
ΔGf° (g): -6.29 kcal/mol 8 = -26.32 kJ/mol

Safety Information

NFPA 704 Ratings:
Health: 2 - Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury.
Flammability: 1 - Must be heated before ignition can occur. Flash point over 93°C (200°F).
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 3807.
(2) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 3-152.
(3) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-31.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:68.
(5) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-31.
(6) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:68.
(7) - Lide, David R. CRC Handbook of Chemistry and Physics, 83rd ed.; CRC Press: Boca Raton, FL, 2002; p 5-31.
(8) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:68.