Main page (Russian) Search in database (English)

Properties of substance:

4-methylbenzoic acid

Synonyms:

p-toluic acid
para-toluic acid

Group of substances:

organic

Physical appearance:

colorless needles crystals

Empirical formula (Hill's system for organic substances):

C8H8O2

Structural formula as text:

CH3C6H4COOH

Molar/atomic mass: 136.148

Melting point (°C):

179.6-181

Sublimation point (°C):

275

Solubility (g/100 g of solvent):

m-xylene: 0.9 (14°C) [Ref.]
monochlorbenzene: 2.17 (31.8°C) [Ref.]
o-xylene: 1.05 (14°C) [Ref.]
p-cresole: 1.47 (14°C) [Ref.]
water: 0.04 (25°C) [Ref.]
water: 1.17 (100°C) [Ref.]

Dissociation:

pKa (1) = 4.36 (25°C, water)

References:

  1. Journal of Physical and Chemical Reference Data. - 2013. - Vol. 42, No. 3. - pp. 033103-475 - 033103-481
  2. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 586-588
  3. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 473
  4. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 493 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1395, 1512 [Russian]
  6. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 994-995 [Russian]
  7. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 94 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru