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| 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 |
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| p-Toluylsäure physikalisch-chemischer Eigenschaften |
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| Siedepunkt:: |
274-275 °C(lit.)
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| storage temp. : |
Store at RT. |
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| Wasserlöslichkeit: |
<0.1 g/100 mL at 19 ºC |
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| Stabilität:: |
Stable. Incompatible with strong oxidizing agents, strong bases. |
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p-Toluylsäure Chemische Eigenschaften,Einsatz,Produktion Methoden |
Chemische Eigenschaften
colourless crystals or white crystalline powder |
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Verwenden
Intermediates of Liquid Crystals |
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Allgemeine Beschreibung
White powder. Sublimes. |
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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. |
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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. . |
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Brandgefahr
Flash point data for p-Toluic acid are not available; however, p-Toluic acid is probably combustible. |
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R-Sätze Betriebsanweisung:
R22:Gesundheitsschädlich beim Verschlucken. |
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S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden. |
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Aussehen Eigenschaften
C8H8O2; p-Toluylsäure, p-Tolylsäure. Feinkristallines, farbloses Pulver mit schwach aromatischem Geruch. |
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Gefahren für Mensch und Umwelt
Gesundheitsschädlich beim Verschlucken. Nervengift.
LD50 (oral, Ratt): 400 mg/kg |
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Schutzmaßnahmen und Verhaltensregeln
Schutzhandschuhe als kurzzeitiger Staubschutz. |
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Verhalten im Gefahrfall
Trocken aufnehmen. Staubentwicklung vermeiden.
Wasser, Kohlendioxid, Schaum, Pulver. |
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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 |
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Sachgerechte Entsorgung
Laborchemikalienabfälle oder gelöst in Aceton in halogenfreien organischen Lösemittelabfällen. |
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| p-Toluylsäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler. Global( 246)Lieferanten |
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para-Toluic acid
p-carboxytoluene
p-toluic
Benzoic Acids (Building Blocks for Liquid Crystals)
Building Blocks for Liquid Crystals
P-METHYLBENZOIC ACID
RARECHEM AL BO 0067
P-TOLUYLIC ACID
P-TOLUIC ACID
PTLA
SUPPORTED BENZOIC ACID
Organic Building Blocks
toluenecarboxylic acid
Crithminic acid
BENZOIC ACID, 4-METHYL-
Building Blocks
Carbonyl Compounds
Carboxylic Acids
C8
4-METHYLBENZOIC ACID ZONE REFINED
4-METHYLBENZOIC ACID
4-TOLUIC ACID
99-94-5
AKOS BBS-00003712
ARYL ACID
P-ToluicAcid>98%
P-ToluicAcidForSynthesis
PARA -TOLUIC ACID FOR SYNTHESIS
CH3C6H4CO2H
4-Methylbenzoic acid 98%
p-Toluylsure
Intermediates
1% Divinylbenzene (DVB) cross-linked polystyrene, 100 - 200 mesh, 2.5 - 3.0mmol/g.
blocks
BuildingBlocks
Liquid Crystal intermediates
99945
Aromatic Carboxylic Acids, Amides, Anilides, Anhydrides & Salts
Carboxylic Acids
Phenyls & Phenyl-Het
Benzoic Acids (Building Blocks for Liquid Crystals)
Building Blocks for Liquid Crystals
Functional Materials
Carboxylic Acids
Phenyls & Phenyl-Het
p-Tolylcarboxylic acid
4-Toluic acid ,99%
p-Toluic acid ,99%
p-Toluic acid,4-Methylbenzoic acid
4-Carboxytoluene, p-Toluic acid
p-Toluic acid, 98% 100GR
Building Blocks
C8
Carbonyl Compounds
Chemical Synthesis
Organic Building Blocks
p-Toluic acid 98%
p-Toluic acid, CP,97%
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