4-Brombenzoesure

Bezeichnung:4-Brombenzoesure

CAS-Nr586-76-5

Englisch Name:4-Bromobenzoic acid

CBNumberCB1490484

SummenformelC7H5BrO2

Molgewicht201.02

MOL-Datei586-76-5.mol

Synonyma

4-Brombenzoesure

4-Brombenzoesure physikalisch-chemischer Eigenschaften

Schmelzpunkt	252-254 °C (lit.)
Siedepunkt	116 °C(Press: 15-16 Torr)
Dichte	1,894 g/cm³
Brechungsindex	1.6080 (estimate)
storage temp.	Sealed in dry,Room Temperature
Löslichkeit	ethanol: soluble5%
Aggregatzustand	Crystals or Powder
pka	3.96(at 25℃)
Farbe	White to beige to pink-brownish
Wasserlöslichkeit	SOLUBLE IN HOT WATER
Merck	14,1408
BRN	1906923
Stabilität	Stable. Incompatible with strong oxidizing agents.
InChIKey	TUXYZHVUPGXXQG-UHFFFAOYSA-N
CAS Datenbank	586-76-5(CAS DataBase Reference)
NIST chemische Informationen	Benzoic acid, 4-bromo-(586-76-5)
EPA chemische Informationen	4-Bromobenzoic acid (586-76-5)

Sicherheit

Kennzeichnung gefährlicher	Xn,Xi
R-Sätze:	22-36/37/38-36-37/38
S-Sätze:	26-36-24/25-22-37/39
WGK Germany	3
RTECS-Nr.	DG4448050
Hazard Note	Irritant
TSCA	Yes
HS Code	29163900

Gefahreninformationscode (GHS)

4-Bromobenzoic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R36:Reizt die Augen.
R37/38:Reizt die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
S22:Staub nicht einatmen.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
White to light yellow crystal powder
Verwenden
4-Bromobenzoic acid was used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography. It was used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry. It is also used as an intermediate for the synthesis of agrochemicals, pharmaceutical, chemical intermediates and liquid crystals.
Definition
ChEBI: A bromobenzoic acid carrying a single bromo subsituent at the 4-position.
Synthesis Reference(s)
Synthetic Communications, 17, p. 457, 1987 DOI: 10.1080/00397918708063924
Tetrahedron Letters, 18, p. 4631, 1977
Allgemeine Beschreibung
Colorless to red crystals.
Reaktivität anzeigen
Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in 4-Bromobenzoic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.
Health Hazard
ACUTE/CHRONIC HAZARDS: Explodes above its melting point.
läuterung methode
Crystallise the acid from MeOH, or MeOH/water mixture, 90% EtOH and Et2O. The methyl ester has m 81o from Et2O or dilute MeOH. The anilide has m 197o (from EtOH). [Male & Thorp J Am Chem Soc 35 269 1913, Lamneck J Am Chem Soc 76 406 1954, Vandenbelt et al. Anal Chem 26 926 1954, Beilstein 9 IV 1017.]

4-Bromobenzoic acid Upstream-Materialien And Downstream Produkte

4-Brombenzoesure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

586-76-5, 4-Bromobenzoic acid Verwandte Suche:

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