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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: 318.32276

Melting point (°C):

261

CAS №: 77-09-8

Solubility (g/100 g of solvent):

acetic acid: 0.44 (25°C) [Ref.]
acetone: 26.4 (18°C) [Ref.]
acetone: 28.01 (25°C) [Ref.]
benzene: 0.16 (18°C) [Ref.]
benzene: 0.0031 (25°C) [Ref.]
carbon disulphide: 0.18 (18°C) [Ref.]
carbon tetrachloride: 0.0013 (25°C) [Ref.]
chloroform: 3.06 (18°C) [Ref.]
chloroform: 0.006 (25°C) [Ref.]
diethyl ether: 8.34 (20°C) [Ref.]
diethyl ether: 0.48 (25°C) [Ref.]
ethanol: 26.5 (20°C) [Ref.]
ethanol 41.5%: 0.78 (25°C) [Ref.]
ethanol 92.4%: 10.37 (25°C) [Ref.]
ethanol 99.6%: 9.2 (25°C) [Ref.]
ethyl acetate: 6.56 (18°C) [Ref.]
ethylene glycol : 2.14 (25°C) [Ref.]
glycerol 95.2%: 0.053 (25°C) [Ref.]
kerosene: 0.0019 (25°C) [Ref.]
methanol: 14.2 (18°C) [Ref.]
methanol: 9.17 (25°C) [Ref.]
nitrobenzene: 4.41 (18°C) [Ref.]
petroleum ether: 0.017 (25°C) [Ref.]
pyridine: 769 (room temperature) [Ref.]
pyridine: 152.29 (25°C) [Ref.]
quinoline: 0.32 (20°C) [Ref.]
toluene: 0.61 (18°C) [Ref.]
water: 0.0002 (25°C) [Ref.]
xylene: 0.18 (18°C) [Ref.]

Numerical data:

Year of discovery: 1871

Density:

1.277 (32°C, g/cm3)

Reactions of synthesis:

  1. Yeild 93%. [Ref.1aster, Ref.2aster, Ref.3aster, Ref.4aster, Ref.5aster, Ref.6aster, Ref.7aster, Ref.8aster, Ref.9aster, Ref.10aster]

Dissociation:

pKa (1) = 9.4 (25°C, water)

References:

  1. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-446
  2. Dictionary of organic compounds. - Vol. 3, naphthacarbazole - zygadenine. - М.: ИИЛ, 1949. - pp. 372
  3. The Merck Index 11th ed., Merck & Company, 1989. - pp. 1150-1151
  4. Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 160 [Russian]
  5. Девяткин В.В., Ляхова Ю.М. Химия для любознательных, или о чем не узнаешь на уроке. - Ярославль: Академия Холдинг, 2000. - pp. 53 [Russian]
  6. Индикаторы. - Т.1. - М.: Мир, 1976. - pp. 135-136 [Russian]
  7. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1249, 1371, 1526, 1585 [Russian]
  8. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 1052-1053 [Russian]
  9. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 74 [Russian]
  10. Энциклопедия для детей. - Т.17: Химия. - М.: Аванта+, 2004. - pp. 163 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru