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Thionyl bromide

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Origin: China

Cas No: 507-16-4

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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CAS No.: 507-16-4 Formula: Br2OS Molecular Weight: 207.87200

Description

Thionyl bromide is the chemical compound SOBr2. It is less stable and less widely used than its chloride analogue, thionyl chloride. It is prepared by the action of hydrogen bromide on thionyl chloride, a characteristic reaction where a stronger acid is converted to a weaker acid:
SOCl2 + 2HBr → SOBr2 + 2HCl
Thionyl bromide is used for some brominations of certain α,β-unsaturated carbonyls, and it also converts alcohols to alkyl bromides. Otherwise it hydrolyzes readily to release sulfur dioxide:
SOBr2 + H2O → SO2 + 2HBr

Basic Info

Chemical Name	Thionyl bromide
Synonyms	thionylbromide; Sulfur oxy dibromide; Thionyl dibromide; sulfurous dibromide; SOBr2;
CAS No.	507-16-4
Molecular Formula	Br2OS
Molecular Weight	207.87200
PSA	36.28000
LogP	2.22060

Properties

Appearance & Physical State	Yellow liquid
Density	2.683
Boiling Point	48ºC (20 mmHg)
Melting Point	-52ºC
Flash Point	156ºC
Refractive Index	1.675
Storage Condition	2-8ºC
Vapor Pressure	10 mm Hg ( 31 °C)

Safety Info

Hazard Class	8
Safety Statements	S26-S36/37/39-S45
WGK Germany	3
Packing Group	II
RIDADR	UN 3264
Risk Statements	R14; R20/21; R34
Hazard Codes	C

Synthesis Route

phosphorus trichloride dibromide→Thionyl bromide+phosphoryl trichloride
thionyl dichloride+hydrogen bromide→Thionyl bromide
hydrogen bromide→Thionyl bromide

Precursor

thionyl dichloride
Aluminium bromide
phosphorus trichloride dibromide
hydrogen bromide

Downstream Product

hypobromous dithioperoxyanhydride
sulfur dioxide
trifluoromethanesulfinyl bromide
dibromine

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