ALPHA-BROMOSTYRENE

CAS NO.：98-81-7
Empirical Formula: C8H7Br
Molecular Weight: 183.05
MDL number: MFCD00012229
EINECS: 202-702-4
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:19:11

What is ALPHA-BROMOSTYRENE?

Chemical properties

ALPHA-Bromostyrene is a clear yellow liquid or Pale yellowish mobile liquid. Almost insoluble in water, soluble in alcohol and oils. B.P. approximately 190℃. (decompose.). Pungent-sweet, gassy-floral odor, reminiscen~ of Hyacinth in extreme dilution. Slightly softer than the odor of omega-Bromostyrol.

The Uses of ALPHA-BROMOSTYRENE

(1-Bromoethenyl)-benzene is a useful synthetic intermediate. It is a reactant used to synthesize Potassium (1-Phenylcyclopropyl)trifluoroborate (P698400). It can also be used in the synthesis of substituted cyclopentenones.

The Uses of ALPHA-BROMOSTYRENE

alpha-Bromostyrene has been suggested as a modifier for the classic chemical omega-Bromostyrol, but does not seem to offer significant advantages. alpha-Bromostyrol is easily hydrolyzed in the presence of water or mild acid to Aceto-phenone (which will affect the odor type significantly).

Preparation

From Styrene by treatment with Bromine. The resulting Styrene dibromide is treated with alcoholic KOH to yield alpha-Bromostyrol.

Properties of ALPHA-BROMOSTYRENE

Melting point:	−44 °C(lit.)
Boiling point:	67-70 °C4 mm Hg(lit.)
Density	1.41 g/mL at 25 °C(lit.)
refractive index	n20/D 1.588(lit.)
Flash point:	188 °F
storage temp.	2-8°C
solubility	Chloroform, Methanol
form	Liquid
color	Clear colorless to yellow

Safety information for ALPHA-BROMOSTYRENE

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.