[A15684] CAS 39416-48-3 | Pyridine hydrobromide perbromide, tech. 90%

CAS : 39416-48-3
UN# : UN3261
MDL : MFCD00013223
Hazard Class : 8
EINECS : 254-446-8
Packing Group : III

Other name :

Pyridinium bromide perbromidePyridinium tribromide

Chemical Properties

Formula : C5H5N•HBr3
Formula weight : 319.82
Melting Point : 128-136°
Sensitivity : Ambient temperatures.
Form : Crystalline solid
Solubility : Soluble in methanol, acetic acid, ethanol, n-butanol and terahydrofuran. Insoluble in water, carbon tetrachloride, ethyl bromide, benzene, toluene, ligroin, petroleum ether.

Literature References

Stable, crystalline, readily-handled source of bromine, useful for a wide range of brominations, including ɑ-bromination of ketones: J. Am. Chem. Soc., 70, 417 (1948), and conversion of alkenes to vic-dibromides. See, for example: Org. Synth. Coll., 5, 604 (1973), Note 2. The rate of addition to alkenes increases markedly on increased substitution, so that selective bromination of the more substituted of two double bonds can be achieved: Synthesis, 966 (1979). In pyridine, cyclopentenones are converted directly to their ɑ-bromo derivatives (addition-elimination): Synth. Commun., 18, 1323 (1988). Selective monobromination of anilines, predominantly at the para-position, can be effected in THF: Synth. Commun., 23, 855 (1993). In aqueous AcOH, alkyl aryl ethers are p-brominated in high yield: Synth. Commun., 28, 499 (1998), whereas aryl methyl ethers are demethylated on heating in xylene: Indian J. Chem., 33B, 288 (1994). Cleaves thioacetals in the presence of TBAB: J. Org. Chem., 46, 1745 (1981).

Notes

Store in cool place. Incompatible with strong oxidizing agents and strong bases.Other References:Beilstein: 3690144Merck: 14,7973UN#: UN3261

Grade Specifications

Grade Specifications

Hazard Statements : H314-H318Causes severe skin burns and eye damage.Causes serious eye damage.
Precautionary Statements : P260-P303+P361+P353-P305+P351+P338-P301+P330+P331-P405-P501aDo not breathe dust/fume/gas/mist/vapours/spray.IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.Store locked up.Dispose of contents/container in accordance with local/regional/national/international regulations.