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P-Metilbenzoata acido

4-Metilbenzoata acido
Kemia formulo C8H8O2
p-Metilbenzoata acido
Plata kemia strukturo de la
Metilbenzoata acido
p-Metilbenzoata acido
Tridimensia kemia strukturo de la Metilbenzoata acido
Alternativa(j) nomo(j)
  • Metilbenzoata acido
  • p-Metilbenzoata estero de la metilbenzoata acido
  • p-Metilbenzoata estero de la p-metilbenzoata acido
CAS-numero-kodo 99-94-5
ChemSpider kodo 7470
PubChem-kodo 7190
Fizikaj proprecoj
Aspekto blanka solidaĵo
Molmaso 136,15g mol−1
Denseco 1,06 g/cm−3[1]
Fandpunkto 128 °C [2]
Bolpunkto 274,5 °C [3]
Refrakta indico  1,5086
Ekflama temperaturo 181 °C [4]
124,7 °C[5][6].
Solvebleco Akvo:<0,1 g/L
Mortiga dozo (LD50) >2000 mg/kg (buŝe)
GHS etikedigo de kemiaĵoj
GHS Damaĝo Piktogramo
07 – Toksa substanco
GHS Signalvorto Averto
GHS Deklaroj pri damaĝoj H302, H315, H317, H319, H335
GHS Deklaroj pri antaŭgardoj P261, P264, P264+265, P270, P271, P272, P280, P301+317, P302+352, P304+340, P305+351+338, P319, P321, P330, P332+317, P333+313, P337+317, P362+364, P403+233, P405, P501
Escepte kiam indikitaj, datumoj estas prezentataj laŭ iliaj normaj kondiĉoj pri temperaturo kaj premo
(25 °C kaj 100 kPa)

p-Metilbenzoata acido4-toluenata acido estas organika kombinaĵo apartenanta al la familio de la esteroj, rezultanta el hidrolizo de la p-metilbenzoila klorido aŭ oksidigo de la p-metilbenzila alkoholo. p-Metilbenzoata acido estas blanka solidaĵo, nesolvebla en akvo sed solvebla en alkoholoj kaj aliaj nepolaraj organikaj solvantoj. p-Metilbenzoata acido prezentas acidan grupon ligitan al p-metilbenzoata grupo. Ĝi konsistas je 8 karbonatomoj, 8 hidrogenatomoj, 2 oksigenatomoj kaj posedas antifungajn kaj antimikrobajn proprecojn.

Reakcioj

Reakcio 1

  • Preparado de p-Metilbenzoata acido per hidrolizo de la p-toluenoila klorido:

p-Toluoila klorido p-Metilbenzoata acido

Reakcio 2

  • Preparado de p-Metilbenzoata acido per oksidigo de la p-metilbenzila alkoholo:

p-Metilbenzila alkoholo p-Metilbenzoata acido

Reakcio 3

  • Preparado de p-Metilbenzoata acido per oksidigo de la p-metilbenzaldehido:

p-Metilbenzaldehido p-Metilbenzoata acido

Reakcio 4

  • Preparado de p-Metilbenzoata acido per traktado de p-toluenoila klorido kun natria hidroksido:

p-Toluoila klorido + natria hidroksido p-Metilbenzoata acido + natria klorido

Vidu ankaŭ

Referencoj

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