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Properties of substance:

p-toluenesulfonic acid

Group of substances:

organic

Physical appearance:

white monoclinic crystals

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

C7H8O3S

Structural formula as text:

CH3C6H4SO3H

Molar/atomic mass: 172.2

Melting point (°C):

106-107

CAS №: 105-15-4

Solubility (g/100 g of solvent):

acetonitrile: soluble [Ref.]
diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
water: 67 (20°C) [Ref.]

Hygroscopic:

yes

Vapour pressure (Torr):

20 (140°C)

Dissociation:

pKa (1) = 0.7 (25°C, water)

LD50 (mg/kg):

2480 (rats, oral)
735 (, oral)

References:

  1. Dictionary of organic compounds. - Vol. 3, naphthacarbazole - zygadenine. - М.: ИИЛ, 1949. - pp. 775
  2. Lange's handbook of chemistry. - 16 ed. - McGraw Hill, 2005. - pp. 2.240
  3. Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 309-310
  4. Краткая химическая энциклопедия. - Т. 5: Т-Я. - М.: Советская энциклопедия, 1967. - pp. 212 [Russian]
  5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 1006-1007 [Russian]
  6. Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 94 [Russian]
  7. Токсикологический вестник. - 2003. - №6. - pp. 54 [Russian]
  8. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 606-607 [Russian]
  9. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 584 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru