p-Toluylsäure Produkt Beschreibung

p-Toluic acid Struktur
99-94-5
  • CAS-Nr.99-94-5
  • Bezeichnung:p-Toluylsäure
  • Englisch Name:p-Toluic acid
  • Synonyma:p-Toluylsure;p-Toluylsäure
    PTLA;p-toluic;p-Toluylsure;P-TOLUIC ACID;4-TOLUIC ACID;P-TOLUYLIC ACID;Crithminic acid;p-carboxytoluene;para-Toluic acid;P-ToluicAcid>98%
  • CBNumber:CB7854776
  • Summenformel:C8H8O2
  • Molgewicht:136.15
  • MOL-Datei:99-94-5.mol
p-Toluylsäure physikalisch-chemischer Eigenschaften
  • Schmelzpunkt: :177-180 °C (lit.)
  • Siedepunkt: :274-275 °C (lit.)
  • Dichte :1,06 g/cm3
  • Dampfdruck :0.02 hPa (70 °C)
  • Brechungsindex :1.5120 (estimate)
  • Flammpunkt: :181°C
  • storage temp.  :Store below +30°C.
  • Löslichkeit :0.3g/l
  • Aggregatzustand :Powder
  • pka :4.36(at 25℃)
  • Farbe :White to slightly yellow-cream
  • Wasserlöslichkeit :<0.1 g/100 mL at 19 ºC
  • Merck  :14,9535
  • BRN  :507600
  • Stabilität: :Stable. Incompatible with strong oxidizing agents, strong bases.
  • InChIKey :LPNBBFKOUUSUDB-UHFFFAOYSA-N
  • CAS Datenbank :99-94-5(CAS DataBase Reference)
  • NIST chemische Informationen :Benzoic acid, 4-methyl-(99-94-5)
  • EPA chemische Informationen :Benzoic acid, 4-methyl- (99-94-5)
Sicherheit
  • Kennzeichnung gefährlicher :Xn
  • R-Sätze: :22
  • S-Sätze: :22-24/25
  • WGK Germany  :1
  • RTECS-Nr. :XU1575000
  • Selbstentzündungstemperatur :570 °C
  • TSCA  :Yes
  • HS Code  :29163900
  • Toxizität :LD50 orally in Rabbit: 400 mg/kg

p-Toluic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

  • R-Sätze Betriebsanweisung: R22:Gesundheitsschädlich beim Verschlucken.
  • S-Sätze Betriebsanweisung: S22:Staub nicht einatmen.
    S24/25:Berührung mit den Augen und der Haut vermeiden.
  • Aussehen Eigenschaften C8H8O2; p-Toluylsäure, p-Tolylsäure. Feinkristallines, farbloses Pulver mit schwach aromatischem Geruch.
  • Gefahren für Mensch und Umwelt Gesundheitsschädlich beim Verschlucken. Nervengift.
    LD50 (oral, Ratt): 400 mg/kg
  • Schutzmaßnahmen und Verhaltensregeln Schutzhandschuhe als kurzzeitiger Staubschutz.
  • Verhalten im Gefahrfall Trocken aufnehmen. Staubentwicklung vermeiden.
    Wasser, Kohlendioxid, Schaum, Pulver.
  • Erste Hilfe Nach Hautkontakt: Mit viel Wasser abwaschen.
    Nach Augenkontakt: Mit viel Wasser und geöffnetem Lidspalt mindesten 10 Minuten ausspülen. Augenarzt hinzuziehen.
    Nach Einatmen: Frischluft.
    Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
    Ersthelfer: siehe gesonderten Anschlag

  • Sachgerechte Entsorgung Laborchemikalienabfälle oder gelöst in Aceton in halogenfreien organischen Lösemittelabfällen.
  • Chemische Eigenschaften colourless crystals or white crystalline powder. Slightly soluble in water; soluble in alcohol and ether. Combustible.
  • Verwenden Intermediates of Liquid Crystals
  • Definition ChEBI: A methylbenzoic acid in which the methyl substituent is located at position 4.
  • Synthesis Reference(s) Journal of the American Chemical Society, 94, p. 4024, 1972 DOI: 10.1021/ja00766a069
    The Journal of Organic Chemistry, 37, p. 2564, 1972 DOI: 10.1021/jo00981a010
  • Air & Water Reaktionen Fine dust dispensed in air in sufficient concentrations, and in the presence of an ignition source is a potential dust explosion hazard. . Insoluble in water.
  • Reaktivität anzeigen p-Toluic acid is a carboxylic acid. 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 p-Toluic 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. p-Toluic acid is incompatible with strong oxidizers. p-Toluic acid is also incompatible with strong bases. .
  • Brandgefahr Flash point data for p-Toluic acid are not available; however, p-Toluic acid is probably combustible.
  • läuterung methode Crystallise the acid from water, water/EtOH (1:1), MeOH/water or *benzene. [Beilstein 9 IV 1724.] Aromatic acid impurities (to <0.05%) can be removed via the (±)--methylbenzylamine salt as described for 2,4-dichlorobenzoic acid [Ley & Yates Organic Process Research & Development 12 120 2008]. The S-benzylisothiuronium salt has m 164o (from aqueous EtOH).
p-Toluic acid Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
p-Toluylsäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
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99-94-5, p-Toluic acid Verwandte Suche:
  • p-Tolylcarboxylic acid
  • 4-Toluic acid ,99%
  • 4-Carboxytoluene, p-Toluic acid
  • p-Toluic acid, 98% 100GR
  • p-carboxytoluene
  • p-toluic
  • p-Toluic acid ,99%
  • p-Toluic acid,4-Methylbenzoic acid
  • para-Toluic acid
  • 4-methylbenzoic acid p-Toluic acid
  • 4-Methylbenzoic acid for synthesis
  • p-Toluic acid 98%
  • p-Toluic acid, CP,97%
  • The Methyl benzoic acid
  • p-Toluic acid Vetec(TM) reagent grade, 98%
  • P-ToluicAcid>98%
  • P-ToluicAcidForSynthesis
  • PARA -TOLUIC ACID FOR SYNTHESIS
  • AKOS BBS-00003712
  • 4-Methylbenzoic acid 98%
  • p-Toluylsure
  • 1% Divinylbenzene (DVB) cross-linked polystyrene, 100 - 200 mesh, 2.5 - 3.0mmol/g.
  • P-METHYLBENZOIC ACID
  • RARECHEM AL BO 0067
  • P-TOLUYLIC ACID
  • P-TOLUIC ACID
  • PTLA
  • SUPPORTED BENZOIC ACID
  • toluenecarboxylic acid
  • Crithminic acid
  • BENZOIC ACID, 4-METHYL-
  • 4-METHYLBENZOIC ACID ZONE REFINED
  • 4-METHYLBENZOIC ACID
  • 4-TOLUIC ACID
  • p-TOLUIC ACID, 98%p-TOLUIC ACID, 98%p-TOLUIC ACID, 98%p-TOLUIC ACID, 98%
  • 4-Methylbenzoic acid 95+%
  • Ozagrel Impurity 15
  • p-Toluic Acid &gt
  • p-Toluic acid fandachem
  • PTA,P-Toluic Acid
  • Para-methylbenzoic acid
  • Para-toluenic acid
  • 99-94-5
  • CH3C6H4CO2H
  • 99945
  • ARYL ACID
  • Benzoic Acids (Building Blocks for Liquid Crystals)
  • Building Blocks for Liquid Crystals
  • Organic Building Blocks
  • Building Blocks
  • Carbonyl Compounds
  • Carboxylic Acids
  • C8
  • Building Blocks
  • C8
  • Carbonyl Compounds
  • Chemical Synthesis
  • Organic Building Blocks