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Properties of substance:

phenolphthalein



skc-file

Group of substances:

organic

Physical appearance:

colorless rhombic crystals

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

C20H14O4

Molar/atomic mass: 318.32

Melting point (°C):

261

Solubility (g/100 g of solvent):

acetone: 26.4 (18°C) [Ref.]
benzene: 0.16 (18°C) [Ref.]
carbon disulphide: 0.18 (18°C) [Ref.]
carbon tetrachloride: very slightly soluble [Ref.]
chloroform: 3.06 (18°C) [Ref.]
diethyl ether: 8.34 (20°C) [Ref.]
ethanol: 26.5 (20°C) [Ref.]
ethyl acetate: 6.56 (18°C) [Ref.]
methanol: 14.2 (18°C) [Ref.]
nitrobenzene: 4.41 (18°C) [Ref.]
petroleum ether: 0.017 (25°C) [Ref.]
pyridine: 796 (20°C) [Ref.]
quinoline: 0.32 (20°C) [Ref.]
toluene: 0.61 (18°C) [Ref.]
water: 0.018 (20°C) [Ref.]
xylene: 0.18 (18°C) [Ref.]

Dissociation:

pKa (1) = 9.4 (25°C, water)

References:

  1. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1150-1151
  2. Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 160 [Russian]
  3. Девяткин В.В., Ляхова Ю.М. Химия для любознательных, или о чем не узнаешь на уроке. - Ярославль: Академия Холдинг, 2000. - pp. 53 [Russian]
  4. Индикаторы. - Т.1. - М.: Мир, 1976. - pp. 135-136 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1249, 1371, 1526, 1585 [Russian]
  6. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 1052-1053 [Russian]
  7. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 74 [Russian]
  8. Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 163 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru