Bromoethane CAS#74‑96‑4
Bromoethane is a colourless, highly volatile and flammable aliphatic bromoalkane liquid. Upon prolonged exposure to ambient air and ultraviolet light, the substance will gradually develop a yellowish discoloration. It carries a distinctive ether‑like aroma together with a slight burning pungent taste.
Its key physical parameters are listed as follows: specific gravity reaches 1.4505 measured within the temperature range of 4 °C to 25 °C; boiling point sits at 38.4 °C, while its melting point is‑119 °C. At 25 °C, its vapor pressure registers 475 mmHg. Regarding solubility, it dissolves in water at 0.91 % (w/w) under 20 °C condition, and is fully miscible with ethanol, diethyl ether, chloroform and numerous other common organic solvents.
For fire‑relevant properties, its closed‑cup flash point is‑20 °C, and the auto‑ignition temperature is 511 °C. Its flammability concentration range in air falls between 6.75 % and 11.25 %. Though bromoethane maintains fair stability under normal storage conditions, hazardous decomposition will take place under intense heating, releasing highly‑toxic bromine vapor and hydrobromide fumes. Moreover, it is chemically incompatible and may undergo vigorous reactions with strong oxidizing agents, hence separate storage and careful handling are strongly required.
Bromoethane Chemical Properties |
Melting point | -119 °C |
Boiling point | 37-40 °C(lit.) |
density | 1.46 g/mL at 25 °C(lit.) |
vapor density | ~3.75 (vs air) |
vapor pressure | 25.32 psi ( 55 °C) |
refractive index | n20/D 1.425(lit.) |
Fp | -23 °C |
storage temp. | Store below +30°C. |
solubility | Miscible with ethanol, ether, chloroform and organic solvents. |
form | Liquid |
color | Clear colorless to slightly yellow |
explosive limit | 6.7-11.3%(V) |
Water Solubility | 0.91 g/100 mL (20 ºC) |
Sensitive | Light Sensitive |
Merck | 14,3771 |
BRN | 1209224 |
Henry's Law Constant | 7.56(x 10-3 atmm3/mol) at 25 °C (Hine and Mookerjee, 1975) |
Dielectric constant | 9.4（20℃） |
Exposure limits | TLV-TWA 200 ppm (～90 mg/m3) (ACGIH, MSHA, OSHA, and NIOSH); TLV STEL 250 ppm (～110 mg/m3) (ACGIH); IDLH 3500 ppm (NIOSH). |
Stability: | Stable. Highly flammable. Readily forms explosive mixtures with air. Note low flash point. Incompatible with alkali metals, aluminium, magnesium, strong bases, water, strong oxidizing agents. May be light sensitive. |
InChI | 1S/C2H5Br/c1-2-3/h2H2,1H3 |
InChIKey | RDHPKYGYEGBMSE-UHFFFAOYSA-N |
SMILES | CCBr |
Surface tension | 24.2mN/m at 20°C |
CAS DataBase Reference | 74-96-4(CAS DataBase Reference) |
NIST Chemistry Reference | Ethane, bromo-(74-96-4) |
IARC | 3 (Vol. 52, 71) 1999 |
EPA Substance Registry System | Bromoethane (74-96-4) |
Safety Information |
Hazard Codes | F,Xn |
Risk Statements | 11-20/22-40 |
Safety Statements | 36/37 |
RIDADR | UN 1891 6.1/PG 2 |
WGK Germany | 1 |
RTECS | KH6475000 |
F | 8 |
Autoignition Temperature | 952 °F |
TSCA | TSCA listed |
HS Code | 2903 39 19 |
HazardClass | 6.1 |
PackingGroup | II |
Storage Class | 3 - Flammable liquids |
Hazard Classifications | Acute Tox. 4 Inhalation |
Hazardous Substances Data | 74-96-4(Hazardous Substances Data) |
Toxicity | LC50 rats, mice (ppm): 27000, 16200 (Vernot) |
IDLA | 2,000 ppm |
