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Properties of substance:

pyrocatechol

Group of substances:

organic

Physical appearance:

colorless monoclinic crystals

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

C6H6O2

Structural formula as text:

C6H4(OH)2

Molar/atomic mass: 110.1106

Melting point (°C):

105

Boiling point (°C):

245.9

Solubility (g/100 g of solvent):

acetone: 194 (20°C) [Ref.]
ammonia liquid : very easily soluble [Ref.]
benzene: 0.8 (20°C) [Ref.]
benzene: 8.1 (60°C) [Ref.]
carbon tetrachloride: 0.1 (20°C) [Ref.]
carbon tetrachloride: 0.9 (60°C) [Ref.]
chloroform: 2.1 (20°C) [Ref.]
chloroform: 7.4 (60°C) [Ref.]
diethyl ether: 190 (60°C) [Ref.]
ethanol: 139 (20°C) [Ref.]
ethanol: 288 (60°C) [Ref.]
pyridine: soluble [Ref.]
water: 45.1 (20°C) [Ref.]
water: 421 (60°C) [Ref.]

Density:

1.344 (4°C, g/cm3)
1.371 (15°C, d4)
1.1493 (21°C, g/cm3)

Refractive index (nD):

1.604 (20°C)

Vapour pressure (Torr):

100 (176°C)

Dissociation:

pKa (1) = 9.34 (25°C, water)
pKa (2) = 12.6 (25°C, water)

Dipole moment (D):

2.58 (20°C)

LD50 (mg/kg):

100 (mice, oral)

References:

  1. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 391-392
  2. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 258
  3. Общая органическая химия. - Т. 2, под ред. Бартона Д. и Оллиса В.Д. - М.: Химия, 1982. - pp. 218, 265-267 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 173 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 436 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1275, 1406 [Russian]
  7. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 890-891 [Russian]
  8. Харлампович Г.Д., Чуркин Ю.В. Фенолы. - М.: Химия, 1974. - pp. 13, 18 [Russian]
  9. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 532-533 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru